./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF --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 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:28:11,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:28:11,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:28:11,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:28:11,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:28:11,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:28:11,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:28:11,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:28:11,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:28:11,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:28:11,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:28:11,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:28:11,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:28:11,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:28:11,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:28:11,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:28:11,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:28:11,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:28:11,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:28:11,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:28:11,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:28:11,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:28:11,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:28:11,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:28:12,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:28:12,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:28:12,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:28:12,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:28:12,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:28:12,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:28:12,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:28:12,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:28:12,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:28:12,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:28:12,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:28:12,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:28:12,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:28:12,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:28:12,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:28:12,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:28:12,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:28:12,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:28:12,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:28:12,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:28:12,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:28:12,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:28:12,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:28:12,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:28:12,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:28:12,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:28:12,083 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:28:12,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:28:12,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:28:12,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:28:12,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:28:12,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:28:12,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:28:12,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:28:12,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:28:12,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:28:12,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:28:12,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:28:12,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:28:12,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:12,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:28:12,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:28:12,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:28:12,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:28:12,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:28:12,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:28:12,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:28:12,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:28:12,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:28:12,092 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_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2021-11-20 06:28:12,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:28:12,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:28:12,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:28:12,385 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:28:12,386 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:28:12,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-11-20 06:28:12,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/data/fd53e9f24/a35a480c7e8b47bc9c3838b47cab7297/FLAG52196e6aa [2021-11-20 06:28:13,266 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:28:13,267 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-11-20 06:28:13,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/data/fd53e9f24/a35a480c7e8b47bc9c3838b47cab7297/FLAG52196e6aa [2021-11-20 06:28:13,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/data/fd53e9f24/a35a480c7e8b47bc9c3838b47cab7297 [2021-11-20 06:28:13,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:28:13,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:28:13,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:13,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:28:13,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:28:13,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58632603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13, skipping insertion in model container [2021-11-20 06:28:13,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:28:13,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:28:15,607 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-11-20 06:28:15,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:15,866 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:28:16,312 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-11-20 06:28:16,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:16,486 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:28:16,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16 WrapperNode [2021-11-20 06:28:16,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:16,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:16,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:28:16,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:28:16,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:16,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:16,720 INFO L137 Inliner]: procedures = 217, calls = 1688, calls flagged for inlining = 75, calls inlined = 52, statements flattened = 3526 [2021-11-20 06:28:16,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:16,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:28:16,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:28:16,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:28:16,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:16,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:16,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:16,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:16,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:16,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:17,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:17,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:28:17,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:28:17,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:28:17,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:28:17,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (1/1) ... [2021-11-20 06:28:17,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:17,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:17,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:28:17,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7717f99-23b1-424e-acff-03fff7a74613/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:28:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-20 06:28:17,148 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-20 06:28:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-20 06:28:17,149 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-20 06:28:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 06:28:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 06:28:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 06:28:17,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 06:28:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 06:28:17,150 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 06:28:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-11-20 06:28:17,151 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-11-20 06:28:17,151 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2021-11-20 06:28:17,151 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2021-11-20 06:28:17,151 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_common [2021-11-20 06:28:17,151 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_common [2021-11-20 06:28:17,152 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-11-20 06:28:17,152 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-11-20 06:28:17,152 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 06:28:17,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 06:28:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-20 06:28:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-20 06:28:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 06:28:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 06:28:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 06:28:17,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 06:28:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:28:17,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:28:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-11-20 06:28:17,154 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-11-20 06:28:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 06:28:17,155 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 06:28:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:28:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 06:28:17,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:28:17,156 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-11-20 06:28:17,156 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-11-20 06:28:17,156 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-11-20 06:28:17,156 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-11-20 06:28:17,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:28:17,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:28:17,157 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-11-20 06:28:17,157 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-11-20 06:28:17,157 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-20 06:28:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-20 06:28:17,158 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-11-20 06:28:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-11-20 06:28:17,158 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-11-20 06:28:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-11-20 06:28:17,159 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-20 06:28:17,159 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-20 06:28:17,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 06:28:17,160 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 06:28:17,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 06:28:17,160 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-11-20 06:28:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-11-20 06:28:17,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 06:28:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-20 06:28:17,163 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-20 06:28:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:28:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-11-20 06:28:17,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-11-20 06:28:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 06:28:17,165 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 06:28:17,166 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-20 06:28:17,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-20 06:28:17,166 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 06:28:17,166 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 06:28:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-11-20 06:28:17,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-11-20 06:28:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:28:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-11-20 06:28:17,167 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-11-20 06:28:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 06:28:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 06:28:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-20 06:28:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-20 06:28:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:28:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:28:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-11-20 06:28:17,170 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-11-20 06:28:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-11-20 06:28:17,170 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-11-20 06:28:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 06:28:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 06:28:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-20 06:28:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-20 06:28:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:28:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-11-20 06:28:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-11-20 06:28:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-11-20 06:28:17,173 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-11-20 06:28:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 06:28:17,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 06:28:17,174 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-20 06:28:17,174 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-20 06:28:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-11-20 06:28:17,175 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-11-20 06:28:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-11-20 06:28:17,176 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-11-20 06:28:17,177 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-11-20 06:28:17,177 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-11-20 06:28:17,177 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-20 06:28:17,178 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-20 06:28:17,178 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-11-20 06:28:17,178 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-11-20 06:28:17,178 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-20 06:28:17,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-20 06:28:17,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:28:17,179 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-20 06:28:17,179 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-20 06:28:17,179 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-11-20 06:28:17,180 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-11-20 06:28:17,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:28:17,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:28:17,759 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:28:17,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:28:18,013 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 06:29:02,351 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:29:02,382 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:29:02,384 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:29:02,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:29:02 BoogieIcfgContainer [2021-11-20 06:29:02,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:29:02,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:29:02,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:29:02,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:29:02,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:28:13" (1/3) ... [2021-11-20 06:29:02,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be8e7fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:29:02, skipping insertion in model container [2021-11-20 06:29:02,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:16" (2/3) ... [2021-11-20 06:29:02,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be8e7fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:29:02, skipping insertion in model container [2021-11-20 06:29:02,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:29:02" (3/3) ... [2021-11-20 06:29:02,407 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-11-20 06:29:02,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:29:02,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:29:02,466 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:29:02,473 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 [2021-11-20 06:29:02,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:29:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2021-11-20 06:29:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:29:02,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:02,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:02,520 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1349896211, now seen corresponding path program 1 times [2021-11-20 06:29:02,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:02,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838924808] [2021-11-20 06:29:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:02,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:03,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:03,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:03,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:03,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:03,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838924808] [2021-11-20 06:29:03,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838924808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:03,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:03,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:29:03,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40008279] [2021-11-20 06:29:03,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:03,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:29:03,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:03,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:29:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:29:03,512 INFO L87 Difference]: Start difference. First operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:29:05,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:07,634 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 [] [2021-11-20 06:29:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:09,454 INFO L93 Difference]: Finished difference Result 1558 states and 2209 transitions. [2021-11-20 06:29:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:29:09,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-20 06:29:09,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:09,483 INFO L225 Difference]: With dead ends: 1558 [2021-11-20 06:29:09,483 INFO L226 Difference]: Without dead ends: 823 [2021-11-20 06:29:09,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:29:09,503 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 471 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 445 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:09,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1997 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 06:29:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-20 06:29:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2021-11-20 06:29:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 511 states have (on average 1.3346379647749511) internal successors, (682), 529 states have internal predecessors, (682), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-11-20 06:29:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 994 transitions. [2021-11-20 06:29:09,683 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 994 transitions. Word has length 39 [2021-11-20 06:29:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:09,684 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 994 transitions. [2021-11-20 06:29:09,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:29:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 994 transitions. [2021-11-20 06:29:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:29:09,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:09,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:09,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:29:09,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1859369301, now seen corresponding path program 1 times [2021-11-20 06:29:09,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:09,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072131599] [2021-11-20 06:29:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:09,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:10,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:10,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:10,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:10,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:10,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072131599] [2021-11-20 06:29:10,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072131599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:10,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:10,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:29:10,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261322730] [2021-11-20 06:29:10,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:10,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:29:10,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:29:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:29:10,180 INFO L87 Difference]: Start difference. First operand 718 states and 994 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:29:12,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:14,257 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 [] [2021-11-20 06:29:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:17,162 INFO L93 Difference]: Finished difference Result 2329 states and 3239 transitions. [2021-11-20 06:29:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:29:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-11-20 06:29:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:17,196 INFO L225 Difference]: With dead ends: 2329 [2021-11-20 06:29:17,196 INFO L226 Difference]: Without dead ends: 1619 [2021-11-20 06:29:17,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:29:17,209 INFO L933 BasicCegarLoop]: 1067 mSDtfsCounter, 1820 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 1002 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:17,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1911 Valid, 3021 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1002 Valid, 902 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-20 06:29:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-11-20 06:29:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1405. [2021-11-20 06:29:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3346653346653348) internal successors, (1336), 1032 states have internal predecessors, (1336), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-20 06:29:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1948 transitions. [2021-11-20 06:29:17,431 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1948 transitions. Word has length 39 [2021-11-20 06:29:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:17,432 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1948 transitions. [2021-11-20 06:29:17,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:29:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1948 transitions. [2021-11-20 06:29:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:29:17,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:17,453 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:29:17,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:29:17,453 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash 950658258, now seen corresponding path program 1 times [2021-11-20 06:29:17,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:17,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439923689] [2021-11-20 06:29:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:17,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:29:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:29:17,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:17,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439923689] [2021-11-20 06:29:17,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439923689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:17,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:17,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:29:17,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469053046] [2021-11-20 06:29:17,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:17,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:29:17,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:17,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:29:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:29:17,897 INFO L87 Difference]: Start difference. First operand 1405 states and 1948 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 06:29:19,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:21,973 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:23,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:26,175 INFO L93 Difference]: Finished difference Result 1637 states and 2275 transitions. [2021-11-20 06:29:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:29:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-11-20 06:29:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:26,188 INFO L225 Difference]: With dead ends: 1637 [2021-11-20 06:29:26,189 INFO L226 Difference]: Without dead ends: 1626 [2021-11-20 06:29:26,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:29:26,191 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 1335 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 547 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:26,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 2480 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 612 Invalid, 3 Unknown, 0 Unchecked, 8.1s Time] [2021-11-20 06:29:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-11-20 06:29:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1405. [2021-11-20 06:29:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3336663336663337) internal successors, (1335), 1032 states have internal predecessors, (1335), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-20 06:29:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1947 transitions. [2021-11-20 06:29:26,278 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1947 transitions. Word has length 59 [2021-11-20 06:29:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:26,279 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1947 transitions. [2021-11-20 06:29:26,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 06:29:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1947 transitions. [2021-11-20 06:29:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:29:26,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:26,282 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:29:26,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:29:26,282 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:26,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916560, now seen corresponding path program 1 times [2021-11-20 06:29:26,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:26,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269231539] [2021-11-20 06:29:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:26,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:29:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:29:26,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:26,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269231539] [2021-11-20 06:29:26,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269231539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:26,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:26,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:29:26,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589969891] [2021-11-20 06:29:26,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:26,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:29:26,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:26,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:29:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:29:26,843 INFO L87 Difference]: Start difference. First operand 1405 states and 1947 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:28,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:30,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:32,896 INFO L93 Difference]: Finished difference Result 1617 states and 2249 transitions. [2021-11-20 06:29:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:29:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2021-11-20 06:29:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:32,912 INFO L225 Difference]: With dead ends: 1617 [2021-11-20 06:29:32,913 INFO L226 Difference]: Without dead ends: 1614 [2021-11-20 06:29:32,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:32,917 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 1392 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 582 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:32,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 1939 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 444 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 06:29:32,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-11-20 06:29:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1404. [2021-11-20 06:29:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1001 states have (on average 1.3326673326673326) internal successors, (1334), 1031 states have internal predecessors, (1334), 308 states have call successors, (308), 95 states have call predecessors, (308), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-20 06:29:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1945 transitions. [2021-11-20 06:29:33,010 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1945 transitions. Word has length 59 [2021-11-20 06:29:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:33,011 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1945 transitions. [2021-11-20 06:29:33,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1945 transitions. [2021-11-20 06:29:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:29:33,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:33,015 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:29:33,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:29:33,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:33,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1180428650, now seen corresponding path program 1 times [2021-11-20 06:29:33,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:33,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388367146] [2021-11-20 06:29:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:33,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:29:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:29:33,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388367146] [2021-11-20 06:29:33,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388367146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:33,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:33,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:29:33,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43851820] [2021-11-20 06:29:33,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:33,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:29:33,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:29:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:29:33,484 INFO L87 Difference]: Start difference. First operand 1404 states and 1945 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:35,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:37,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:39,648 INFO L93 Difference]: Finished difference Result 1616 states and 2247 transitions. [2021-11-20 06:29:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:29:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2021-11-20 06:29:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:39,660 INFO L225 Difference]: With dead ends: 1616 [2021-11-20 06:29:39,660 INFO L226 Difference]: Without dead ends: 1613 [2021-11-20 06:29:39,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:39,662 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 1315 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 541 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:39,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 2416 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 603 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 06:29:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-20 06:29:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1403. [2021-11-20 06:29:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1001 states have (on average 1.3316683316683318) internal successors, (1333), 1030 states have internal predecessors, (1333), 307 states have call successors, (307), 95 states have call predecessors, (307), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-20 06:29:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1943 transitions. [2021-11-20 06:29:39,795 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1943 transitions. Word has length 60 [2021-11-20 06:29:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:39,798 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 1943 transitions. [2021-11-20 06:29:39,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1943 transitions. [2021-11-20 06:29:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:29:39,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:39,800 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:29:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:29:39,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2061626285, now seen corresponding path program 1 times [2021-11-20 06:29:39,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:39,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539382142] [2021-11-20 06:29:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:39,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:29:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:29:40,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:40,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539382142] [2021-11-20 06:29:40,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539382142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:40,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:40,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:29:40,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051483053] [2021-11-20 06:29:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:40,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:29:40,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:29:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:29:40,239 INFO L87 Difference]: Start difference. First operand 1403 states and 1943 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:42,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:43,870 INFO L93 Difference]: Finished difference Result 1615 states and 2245 transitions. [2021-11-20 06:29:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:29:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-20 06:29:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:43,882 INFO L225 Difference]: With dead ends: 1615 [2021-11-20 06:29:43,883 INFO L226 Difference]: Without dead ends: 1612 [2021-11-20 06:29:43,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:43,885 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 1388 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 581 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:43,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 1931 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 445 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:29:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-11-20 06:29:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1402. [2021-11-20 06:29:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1001 states have (on average 1.3306693306693307) internal successors, (1332), 1029 states have internal predecessors, (1332), 306 states have call successors, (306), 95 states have call predecessors, (306), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-20 06:29:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1941 transitions. [2021-11-20 06:29:43,985 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1941 transitions. Word has length 61 [2021-11-20 06:29:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:43,986 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 1941 transitions. [2021-11-20 06:29:43,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1941 transitions. [2021-11-20 06:29:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:29:43,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:43,989 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:29:43,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:29:43,989 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash 513890701, now seen corresponding path program 1 times [2021-11-20 06:29:43,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:43,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057781501] [2021-11-20 06:29:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:43,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:29:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:29:44,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:44,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057781501] [2021-11-20 06:29:44,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057781501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:44,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:44,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:29:44,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776088384] [2021-11-20 06:29:44,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:44,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:29:44,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:29:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:29:44,368 INFO L87 Difference]: Start difference. First operand 1402 states and 1941 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:46,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:48,452 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 [] [2021-11-20 06:29:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:51,836 INFO L93 Difference]: Finished difference Result 4572 states and 6368 transitions. [2021-11-20 06:29:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:29:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-20 06:29:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:51,860 INFO L225 Difference]: With dead ends: 4572 [2021-11-20 06:29:51,861 INFO L226 Difference]: Without dead ends: 3180 [2021-11-20 06:29:51,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:29:51,870 INFO L933 BasicCegarLoop]: 1076 mSDtfsCounter, 1689 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 935 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 3574 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:51,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 3574 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1113 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 06:29:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-11-20 06:29:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2755. [2021-11-20 06:29:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 1965 states have (on average 1.3338422391857507) internal successors, (2621), 2019 states have internal predecessors, (2621), 605 states have call successors, (605), 187 states have call predecessors, (605), 184 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2021-11-20 06:29:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3828 transitions. [2021-11-20 06:29:52,053 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3828 transitions. Word has length 62 [2021-11-20 06:29:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:52,053 INFO L470 AbstractCegarLoop]: Abstraction has 2755 states and 3828 transitions. [2021-11-20 06:29:52,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:29:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3828 transitions. [2021-11-20 06:29:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:29:52,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:52,059 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:29:52,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:29:52,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1643939959, now seen corresponding path program 1 times [2021-11-20 06:29:52,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:52,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306276721] [2021-11-20 06:29:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:52,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:29:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:29:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:29:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:29:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:29:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:29:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:29:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:29:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:29:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:29:52,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:52,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306276721] [2021-11-20 06:29:52,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306276721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:52,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:52,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:29:52,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276736575] [2021-11-20 06:29:52,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:52,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:29:52,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:29:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:29:52,610 INFO L87 Difference]: Start difference. First operand 2755 states and 3828 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:29:54,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:29:56,691 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 [] [2021-11-20 06:29:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:58,547 INFO L93 Difference]: Finished difference Result 6206 states and 8670 transitions. [2021-11-20 06:29:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:29:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 104 [2021-11-20 06:29:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:58,572 INFO L225 Difference]: With dead ends: 6206 [2021-11-20 06:29:58,572 INFO L226 Difference]: Without dead ends: 3469 [2021-11-20 06:29:58,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:29:58,585 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 747 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 680 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:58,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 2893 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 723 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 06:29:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-11-20 06:29:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2813. [2021-11-20 06:29:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2813 states, 2021 states have (on average 1.335477486392875) internal successors, (2699), 2075 states have internal predecessors, (2699), 605 states have call successors, (605), 189 states have call predecessors, (605), 186 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2021-11-20 06:29:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 3906 transitions. [2021-11-20 06:29:58,768 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 3906 transitions. Word has length 104 [2021-11-20 06:29:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:58,769 INFO L470 AbstractCegarLoop]: Abstraction has 2813 states and 3906 transitions. [2021-11-20 06:29:58,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:29:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 3906 transitions. [2021-11-20 06:29:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:29:58,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:58,777 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:29:58,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:29:58,778 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash -832428614, now seen corresponding path program 1 times [2021-11-20 06:29:58,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:58,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561620659] [2021-11-20 06:29:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:58,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:29:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:29:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:29:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:29:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:29:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:29:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:29:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:29:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:29:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:29:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:29:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:29:59,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:59,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561620659] [2021-11-20 06:29:59,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561620659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:59,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:59,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:29:59,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25388885] [2021-11-20 06:29:59,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:59,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:29:59,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:59,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:29:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:29:59,306 INFO L87 Difference]: Start difference. First operand 2813 states and 3906 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:30:01,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:03,389 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 [] [2021-11-20 06:30:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:05,442 INFO L93 Difference]: Finished difference Result 6780 states and 9559 transitions. [2021-11-20 06:30:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:30:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 133 [2021-11-20 06:30:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:05,470 INFO L225 Difference]: With dead ends: 6780 [2021-11-20 06:30:05,470 INFO L226 Difference]: Without dead ends: 3993 [2021-11-20 06:30:05,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:30:05,484 INFO L933 BasicCegarLoop]: 1139 mSDtfsCounter, 987 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 842 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:05,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 3360 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 708 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 06:30:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-11-20 06:30:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 2825. [2021-11-20 06:30:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2033 states have (on average 1.3334972946384653) internal successors, (2711), 2087 states have internal predecessors, (2711), 605 states have call successors, (605), 189 states have call predecessors, (605), 186 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2021-11-20 06:30:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3918 transitions. [2021-11-20 06:30:05,678 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3918 transitions. Word has length 133 [2021-11-20 06:30:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 3918 transitions. [2021-11-20 06:30:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:30:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3918 transitions. [2021-11-20 06:30:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 06:30:05,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:05,685 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:30:05,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:30:05,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash -780408024, now seen corresponding path program 1 times [2021-11-20 06:30:05,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:05,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61188623] [2021-11-20 06:30:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:05,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:30:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:05,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:30:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:30:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:30:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:30:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:30:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:30:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:30:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:30:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:30:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:30:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:30:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-20 06:30:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-20 06:30:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:30:06,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:06,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61188623] [2021-11-20 06:30:06,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61188623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:06,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:06,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:30:06,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276839667] [2021-11-20 06:30:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:06,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:30:06,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:30:06,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:30:06,257 INFO L87 Difference]: Start difference. First operand 2825 states and 3918 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (18), 7 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-20 06:30:08,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:10,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:12,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:14,373 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 [] [2021-11-20 06:30:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:19,749 INFO L93 Difference]: Finished difference Result 6269 states and 8750 transitions. [2021-11-20 06:30:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:30:19,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (18), 7 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 149 [2021-11-20 06:30:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:19,775 INFO L225 Difference]: With dead ends: 6269 [2021-11-20 06:30:19,776 INFO L226 Difference]: Without dead ends: 3470 [2021-11-20 06:30:19,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:30:19,786 INFO L933 BasicCegarLoop]: 1589 mSDtfsCounter, 2029 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 1642 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2158 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 5350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1642 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:19,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2158 Valid, 2653 Invalid, 5350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1642 Valid, 3704 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2021-11-20 06:30:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2021-11-20 06:30:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 2822. [2021-11-20 06:30:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2031 states have (on average 1.3318562284588873) internal successors, (2705), 2085 states have internal predecessors, (2705), 604 states have call successors, (604), 188 states have call predecessors, (604), 186 states have return successors, (600), 600 states have call predecessors, (600), 600 states have call successors, (600) [2021-11-20 06:30:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 3909 transitions. [2021-11-20 06:30:20,013 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 3909 transitions. Word has length 149 [2021-11-20 06:30:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:20,014 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 3909 transitions. [2021-11-20 06:30:20,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (18), 7 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-20 06:30:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 3909 transitions. [2021-11-20 06:30:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:30:20,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:20,021 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:30:20,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:30:20,022 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash 130040048, now seen corresponding path program 1 times [2021-11-20 06:30:20,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:20,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704796003] [2021-11-20 06:30:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:20,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:30:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:30:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:30:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:30:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:30:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:30:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:30:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:30:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:30:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:30:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:30:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:30:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-20 06:30:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-20 06:30:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:30:20,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704796003] [2021-11-20 06:30:20,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704796003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:20,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:20,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:30:20,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694399428] [2021-11-20 06:30:20,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:20,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:30:20,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:30:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:30:20,722 INFO L87 Difference]: Start difference. First operand 2822 states and 3909 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 06:30:22,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:24,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:26,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:30,474 INFO L93 Difference]: Finished difference Result 7589 states and 10796 transitions. [2021-11-20 06:30:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:30:30,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 154 [2021-11-20 06:30:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:30,503 INFO L225 Difference]: With dead ends: 7589 [2021-11-20 06:30:30,503 INFO L226 Difference]: Without dead ends: 4793 [2021-11-20 06:30:30,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:30:30,516 INFO L933 BasicCegarLoop]: 1321 mSDtfsCounter, 1259 mSDsluCounter, 9067 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 619 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 10388 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:30,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 10388 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 2249 Invalid, 3 Unknown, 0 Unchecked, 9.4s Time] [2021-11-20 06:30:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2021-11-20 06:30:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 2819. [2021-11-20 06:30:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2029 states have (on average 1.3302119270576638) internal successors, (2699), 2082 states have internal predecessors, (2699), 603 states have call successors, (603), 188 states have call predecessors, (603), 186 states have return successors, (600), 600 states have call predecessors, (600), 600 states have call successors, (600) [2021-11-20 06:30:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3902 transitions. [2021-11-20 06:30:30,746 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3902 transitions. Word has length 154 [2021-11-20 06:30:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:30,747 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 3902 transitions. [2021-11-20 06:30:30,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 06:30:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3902 transitions. [2021-11-20 06:30:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 06:30:30,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:30,755 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:30,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:30:30,756 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1003086829, now seen corresponding path program 1 times [2021-11-20 06:30:30,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324324182] [2021-11-20 06:30:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:30,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:30:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:30:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:30:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:30:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:30:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:30:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:30:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:30:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:30:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:30:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:30:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:30:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-20 06:30:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-20 06:30:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:30:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 06:30:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-20 06:30:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:30:31,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:31,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324324182] [2021-11-20 06:30:31,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324324182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:31,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:31,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:30:31,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801633058] [2021-11-20 06:30:31,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:31,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:30:31,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:30:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:30:31,420 INFO L87 Difference]: Start difference. First operand 2819 states and 3902 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 5 states have internal predecessors, (115), 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) [2021-11-20 06:30:33,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:35,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:37,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:39,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:44,603 INFO L93 Difference]: Finished difference Result 6442 states and 9243 transitions. [2021-11-20 06:30:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:30:44,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 5 states have internal predecessors, (115), 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 184 [2021-11-20 06:30:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:44,643 INFO L225 Difference]: With dead ends: 6442 [2021-11-20 06:30:44,643 INFO L226 Difference]: Without dead ends: 5057 [2021-11-20 06:30:44,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:30:44,649 INFO L933 BasicCegarLoop]: 1118 mSDtfsCounter, 1879 mSDsluCounter, 2939 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 951 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 4057 SdHoareTripleChecker+Invalid, 5293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 951 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:44,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2004 Valid, 4057 Invalid, 5293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [951 Valid, 4338 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2021-11-20 06:30:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5057 states. [2021-11-20 06:30:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5057 to 2819. [2021-11-20 06:30:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2029 states have (on average 1.3292262198127156) internal successors, (2697), 2082 states have internal predecessors, (2697), 603 states have call successors, (603), 188 states have call predecessors, (603), 186 states have return successors, (600), 600 states have call predecessors, (600), 600 states have call successors, (600) [2021-11-20 06:30:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3900 transitions. [2021-11-20 06:30:44,875 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3900 transitions. Word has length 184 [2021-11-20 06:30:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:44,875 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 3900 transitions. [2021-11-20 06:30:44,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 5 states have internal predecessors, (115), 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) [2021-11-20 06:30:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3900 transitions. [2021-11-20 06:30:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-20 06:30:44,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:44,884 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:44,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:30:44,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash 176585654, now seen corresponding path program 1 times [2021-11-20 06:30:44,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:44,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734598621] [2021-11-20 06:30:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:44,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:30:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:30:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:30:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:30:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:30:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:30:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:30:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:30:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:30:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:30:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:30:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:30:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-20 06:30:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-20 06:30:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 06:30:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-20 06:30:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-20 06:30:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:30:45,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:45,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734598621] [2021-11-20 06:30:45,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734598621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:45,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:45,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:30:45,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144653042] [2021-11-20 06:30:45,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:45,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:30:45,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:30:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:30:45,438 INFO L87 Difference]: Start difference. First operand 2819 states and 3900 transitions. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 06:30:47,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:49,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:30:51,525 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 [] [2021-11-20 06:30:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:54,437 INFO L93 Difference]: Finished difference Result 3402 states and 4778 transitions. [2021-11-20 06:30:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:30:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 189 [2021-11-20 06:30:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:54,438 INFO L225 Difference]: With dead ends: 3402 [2021-11-20 06:30:54,438 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 06:30:54,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:30:54,449 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 1538 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 1128 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 2231 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1128 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:54,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 2231 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1128 Valid, 2094 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2021-11-20 06:30:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 06:30:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 06:30:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 06:30:54,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2021-11-20 06:30:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:54,451 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 06:30:54,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 06:30:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 06:30:54,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 06:30:54,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:30:54,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:30:54,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.