./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--usb--serial--usbserial.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bf654a6a1eca45ac77a809162568fb8018795c05fa9eb6946186269d2e2c9c25 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:00:24,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:00:24,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:00:25,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:00:25,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:00:25,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:00:25,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:00:25,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:00:25,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:00:25,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:00:25,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:00:25,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:00:25,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:00:25,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:00:25,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:00:25,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:00:25,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:00:25,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:00:25,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:00:25,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:00:25,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:00:25,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:00:25,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:00:25,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:00:25,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:00:25,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:00:25,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:00:25,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:00:25,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:00:25,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:00:25,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:00:25,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:00:25,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:00:25,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:00:25,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:00:25,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:00:25,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:00:25,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:00:25,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:00:25,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:00:25,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:00:25,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:00:25,150 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:00:25,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:00:25,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:00:25,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:00:25,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:00:25,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:00:25,162 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:00:25,162 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:00:25,163 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:00:25,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:00:25,165 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:00:25,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:00:25,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:00:25,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:00:25,166 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:00:25,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:00:25,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:00:25,167 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:00:25,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:00:25,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:00:25,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:00:25,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:00:25,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:00:25,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:00:25,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:00:25,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:00:25,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:00:25,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:00:25,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:00:25,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:00:25,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:00:25,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:00:25,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:00:25,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:00:25,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:00:25,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:00:25,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:00:25,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:00:25,174 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf654a6a1eca45ac77a809162568fb8018795c05fa9eb6946186269d2e2c9c25 [2021-11-23 02:00:25,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:00:25,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:00:25,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:00:25,485 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:00:25,486 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:00:25,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-23 02:00:25,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/data/cae270ba0/ddc31f3e30504e078d526d13ea8dc779/FLAG1c8e710aa [2021-11-23 02:00:26,612 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:00:26,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-23 02:00:26,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/data/cae270ba0/ddc31f3e30504e078d526d13ea8dc779/FLAG1c8e710aa [2021-11-23 02:00:26,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/data/cae270ba0/ddc31f3e30504e078d526d13ea8dc779 [2021-11-23 02:00:26,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:00:26,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:00:26,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:00:26,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:00:26,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:00:26,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:00:26" (1/1) ... [2021-11-23 02:00:26,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b342f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:26, skipping insertion in model container [2021-11-23 02:00:26,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:00:26" (1/1) ... [2021-11-23 02:00:26,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:00:27,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:00:30,216 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_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[323188,323201] [2021-11-23 02:00:30,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:00:30,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:00:31,198 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_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[323188,323201] [2021-11-23 02:00:31,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:00:31,466 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:00:31,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31 WrapperNode [2021-11-23 02:00:31,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:00:31,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:00:31,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:00:31,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:00:31,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:31,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:31,986 INFO L137 Inliner]: procedures = 481, calls = 4096, calls flagged for inlining = 211, calls inlined = 204, statements flattened = 8088 [2021-11-23 02:00:31,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:00:31,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:00:31,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:00:31,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:00:31,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:31,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:32,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:32,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:32,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:32,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:32,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:32,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:00:32,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:00:32,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:00:32,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:00:32,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (1/1) ... [2021-11-23 02:00:32,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:00:32,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:32,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:00:32,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9d2d8e-6be9-4f8a-8c5e-6d853b6ed4bd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:00:32,614 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2021-11-23 02:00:32,615 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2021-11-23 02:00:32,615 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2021-11-23 02:00:32,615 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2021-11-23 02:00:32,615 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 02:00:32,615 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 02:00:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:00:32,616 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:00:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-23 02:00:32,616 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-23 02:00:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-23 02:00:32,617 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-23 02:00:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-23 02:00:32,617 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-23 02:00:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 02:00:32,617 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 02:00:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-23 02:00:32,618 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-23 02:00:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:00:32,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:00:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2021-11-23 02:00:32,619 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2021-11-23 02:00:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_5 [2021-11-23 02:00:32,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_5 [2021-11-23 02:00:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-23 02:00:32,620 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-23 02:00:32,620 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2021-11-23 02:00:32,620 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2021-11-23 02:00:32,620 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 02:00:32,620 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 02:00:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-23 02:00:32,621 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-23 02:00:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister_drivers [2021-11-23 02:00:32,621 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister_drivers [2021-11-23 02:00:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2021-11-23 02:00:32,622 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2021-11-23 02:00:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-23 02:00:32,622 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-23 02:00:32,623 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_work [2021-11-23 02:00:32,623 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_work [2021-11-23 02:00:32,623 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:00:32,623 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:00:32,624 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2021-11-23 02:00:32,624 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2021-11-23 02:00:32,624 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2021-11-23 02:00:32,625 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2021-11-23 02:00:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-23 02:00:32,626 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-23 02:00:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-23 02:00:32,627 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-23 02:00:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:00:32,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:00:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:00:32,628 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:00:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2021-11-23 02:00:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2021-11-23 02:00:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-23 02:00:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-23 02:00:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 02:00:32,630 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-23 02:00:32,631 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-23 02:00:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:00:32,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:00:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:00:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:00:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-11-23 02:00:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-11-23 02:00:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:00:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-23 02:00:32,633 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-23 02:00:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-23 02:00:32,633 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-23 02:00:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-23 02:00:32,634 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-23 02:00:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:00:32,635 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:00:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-23 02:00:32,635 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-23 02:00:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2021-11-23 02:00:32,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2021-11-23 02:00:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:00:32,636 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:00:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:00:32,637 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-23 02:00:32,637 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-23 02:00:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:00:32,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:00:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:00:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-23 02:00:32,639 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-23 02:00:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-23 02:00:32,640 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-23 02:00:32,640 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-23 02:00:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-23 02:00:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:00:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 02:00:32,642 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 02:00:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-23 02:00:32,642 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-23 02:00:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-23 02:00:32,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-23 02:00:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 02:00:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 02:00:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-23 02:00:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-23 02:00:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:00:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:00:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:00:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:00:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:00:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:00:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:00:32,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:00:32,649 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:00:32,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:00:32,650 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2021-11-23 02:00:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2021-11-23 02:00:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 02:00:32,653 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 02:00:32,653 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-23 02:00:32,653 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-23 02:00:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:00:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:00:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-23 02:00:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-23 02:00:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:00:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:00:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:00:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:00:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-11-23 02:00:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-11-23 02:00:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 02:00:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 02:00:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2021-11-23 02:00:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2021-11-23 02:00:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-23 02:00:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-23 02:00:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 02:00:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 02:00:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 02:00:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 02:00:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 02:00:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 02:00:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2021-11-23 02:00:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2021-11-23 02:00:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:00:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:00:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:00:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:00:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_show [2021-11-23 02:00:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_show [2021-11-23 02:00:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-23 02:00:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-23 02:00:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-23 02:00:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-23 02:00:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:00:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:00:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-23 02:00:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-23 02:00:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:00:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:00:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_4 [2021-11-23 02:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_4 [2021-11-23 02:00:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-23 02:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-23 02:00:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_msr_changed [2021-11-23 02:00:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_msr_changed [2021-11-23 02:00:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2021-11-23 02:00:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2021-11-23 02:00:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:00:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-11-23 02:00:32,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-11-23 02:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_store [2021-11-23 02:00:32,669 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_store [2021-11-23 02:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:00:32,669 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:00:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-11-23 02:00:32,670 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-11-23 02:00:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:00:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:00:32,670 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:00:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-23 02:00:32,671 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-23 02:00:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-11-23 02:00:32,671 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-11-23 02:00:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-23 02:00:32,671 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-23 02:00:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:00:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:00:32,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:00:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-23 02:00:32,672 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-23 02:00:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:00:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2021-11-23 02:00:32,673 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2021-11-23 02:00:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:00:32,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:00:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-23 02:00:32,674 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-23 02:00:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:00:32,674 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:00:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2021-11-23 02:00:32,791 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2021-11-23 02:00:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 02:00:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 02:00:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:00:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:00:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_softint [2021-11-23 02:00:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_softint [2021-11-23 02:00:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-23 02:00:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-23 02:00:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-23 02:00:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-23 02:00:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2021-11-23 02:00:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2021-11-23 02:00:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2021-11-23 02:00:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2021-11-23 02:00:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2021-11-23 02:00:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2021-11-23 02:00:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2021-11-23 02:00:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2021-11-23 02:00:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-23 02:00:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-23 02:00:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure serial_wait_until_sent [2021-11-23 02:00:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_wait_until_sent [2021-11-23 02:00:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 02:00:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 02:00:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2021-11-23 02:00:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2021-11-23 02:00:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2021-11-23 02:00:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2021-11-23 02:00:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:00:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:00:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-23 02:00:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-23 02:00:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:00:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:00:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:00:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure serial_set_termios [2021-11-23 02:00:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_set_termios [2021-11-23 02:00:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-23 02:00:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-23 02:00:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-23 02:00:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2021-11-23 02:00:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:00:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:00:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-23 02:00:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-23 02:00:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-11-23 02:00:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-11-23 02:00:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-11-23 02:00:32,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-11-23 02:00:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_get_by_minor [2021-11-23 02:00:32,796 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_get_by_minor [2021-11-23 02:00:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:00:32,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:00:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2021-11-23 02:00:32,796 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2021-11-23 02:00:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_handle_sysrq_char [2021-11-23 02:00:32,796 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_handle_sysrq_char [2021-11-23 02:00:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-23 02:00:32,796 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-23 02:00:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_table_lock [2021-11-23 02:00:32,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_table_lock [2021-11-23 02:00:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:00:32,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:00:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_table_lock [2021-11-23 02:00:32,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_table_lock [2021-11-23 02:00:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2021-11-23 02:00:32,803 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2021-11-23 02:00:32,803 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-23 02:00:32,803 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-23 02:00:32,803 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-23 02:00:32,803 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-23 02:00:32,803 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:00:32,803 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:00:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:00:32,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:00:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2021-11-23 02:00:32,804 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2021-11-23 02:00:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:00:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-23 02:00:32,804 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-23 02:00:33,945 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:00:33,949 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:00:34,621 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:00:49,715 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:00:51,316 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:00:51,316 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:00:51,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:00:51 BoogieIcfgContainer [2021-11-23 02:00:51,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:00:51,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:00:51,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:00:51,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:00:51,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:00:26" (1/3) ... [2021-11-23 02:00:51,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f509ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:00:51, skipping insertion in model container [2021-11-23 02:00:51,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:31" (2/3) ... [2021-11-23 02:00:51,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f509ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:00:51, skipping insertion in model container [2021-11-23 02:00:51,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:00:51" (3/3) ... [2021-11-23 02:00:51,331 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-23 02:00:51,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:00:51,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:00:51,401 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:00:51,408 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=FINITE_AUTOMATA, 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 [2021-11-23 02:00:51,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:00:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 1863 states, 1174 states have (on average 1.3568994889267463) internal successors, (1593), 1216 states have internal predecessors, (1593), 555 states have call successors, (555), 133 states have call predecessors, (555), 132 states have return successors, (544), 531 states have call predecessors, (544), 544 states have call successors, (544) [2021-11-23 02:00:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-23 02:00:51,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:51,511 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:51,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1736752305, now seen corresponding path program 1 times [2021-11-23 02:00:51,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:51,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015469453] [2021-11-23 02:00:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:51,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:00:52,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:52,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015469453] [2021-11-23 02:00:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015469453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:52,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:00:52,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690397301] [2021-11-23 02:00:52,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:52,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:52,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:52,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:52,798 INFO L87 Difference]: Start difference. First operand has 1863 states, 1174 states have (on average 1.3568994889267463) internal successors, (1593), 1216 states have internal predecessors, (1593), 555 states have call successors, (555), 133 states have call predecessors, (555), 132 states have return successors, (544), 531 states have call predecessors, (544), 544 states have call successors, (544) Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:00:54,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:00:57,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:00,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:03,974 INFO L93 Difference]: Finished difference Result 5359 states and 7997 transitions. [2021-11-23 02:01:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:01:03,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 207 [2021-11-23 02:01:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:04,038 INFO L225 Difference]: With dead ends: 5359 [2021-11-23 02:01:04,039 INFO L226 Difference]: Without dead ends: 3516 [2021-11-23 02:01:04,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:04,064 INFO L933 BasicCegarLoop]: 3025 mSDtfsCounter, 2431 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2431 SdHoareTripleChecker+Valid, 5397 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:04,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2431 Valid, 5397 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 681 Invalid, 3 Unknown, 0 Unchecked, 10.7s Time] [2021-11-23 02:01:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-11-23 02:01:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3492. [2021-11-23 02:01:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 2216 states have (on average 1.3470216606498195) internal successors, (2985), 2266 states have internal predecessors, (2985), 1015 states have call successors, (1015), 261 states have call predecessors, (1015), 260 states have return successors, (1083), 978 states have call predecessors, (1083), 1006 states have call successors, (1083) [2021-11-23 02:01:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 5083 transitions. [2021-11-23 02:01:04,606 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 5083 transitions. Word has length 207 [2021-11-23 02:01:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:04,611 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 5083 transitions. [2021-11-23 02:01:04,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:01:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 5083 transitions. [2021-11-23 02:01:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 02:01:04,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:04,630 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:04,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:01:04,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:04,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1214001539, now seen corresponding path program 1 times [2021-11-23 02:01:04,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:04,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236271521] [2021-11-23 02:01:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:04,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:01:05,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236271521] [2021-11-23 02:01:05,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236271521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:05,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:05,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:01:05,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040062099] [2021-11-23 02:01:05,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:05,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:01:05,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:01:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:05,206 INFO L87 Difference]: Start difference. First operand 3492 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:01:07,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:09,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:12,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:15,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:18,879 INFO L93 Difference]: Finished difference Result 9840 states and 14258 transitions. [2021-11-23 02:01:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:01:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 214 [2021-11-23 02:01:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:18,954 INFO L225 Difference]: With dead ends: 9840 [2021-11-23 02:01:18,954 INFO L226 Difference]: Without dead ends: 6395 [2021-11-23 02:01:18,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:18,988 INFO L933 BasicCegarLoop]: 3282 mSDtfsCounter, 2119 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 5530 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:18,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 5530 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 808 Invalid, 2 Unknown, 0 Unchecked, 13.2s Time] [2021-11-23 02:01:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2021-11-23 02:01:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6369. [2021-11-23 02:01:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 4026 states have (on average 1.3415300546448088) internal successors, (5401), 4117 states have internal predecessors, (5401), 1842 states have call successors, (1842), 501 states have call predecessors, (1842), 500 states have return successors, (1971), 1775 states have call predecessors, (1971), 1833 states have call successors, (1971) [2021-11-23 02:01:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 9214 transitions. [2021-11-23 02:01:19,559 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 9214 transitions. Word has length 214 [2021-11-23 02:01:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:19,560 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 9214 transitions. [2021-11-23 02:01:19,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:01:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 9214 transitions. [2021-11-23 02:01:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 02:01:19,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:19,567 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:19,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:01:19,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -109734932, now seen corresponding path program 1 times [2021-11-23 02:01:19,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:19,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017633084] [2021-11-23 02:01:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:19,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:01:20,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017633084] [2021-11-23 02:01:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017633084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:20,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:20,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:01:20,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022450765] [2021-11-23 02:01:20,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:20,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:01:20,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:20,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:01:20,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:20,175 INFO L87 Difference]: Start difference. First operand 6369 states and 9214 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:01:22,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:24,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:28,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:30,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:35,353 INFO L93 Difference]: Finished difference Result 18583 states and 27035 transitions. [2021-11-23 02:01:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:01:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 214 [2021-11-23 02:01:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:35,605 INFO L225 Difference]: With dead ends: 18583 [2021-11-23 02:01:35,605 INFO L226 Difference]: Without dead ends: 12261 [2021-11-23 02:01:35,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:35,652 INFO L933 BasicCegarLoop]: 4101 mSDtfsCounter, 2416 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2416 SdHoareTripleChecker+Valid, 6409 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:35,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2416 Valid, 6409 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 866 Invalid, 2 Unknown, 0 Unchecked, 14.7s Time] [2021-11-23 02:01:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12261 states. [2021-11-23 02:01:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12261 to 12227. [2021-11-23 02:01:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12227 states, 7731 states have (on average 1.3409649463200104) internal successors, (10367), 7901 states have internal predecessors, (10367), 3516 states have call successors, (3516), 979 states have call predecessors, (3516), 979 states have return successors, (3967), 3395 states have call predecessors, (3967), 3507 states have call successors, (3967) [2021-11-23 02:01:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12227 states to 12227 states and 17850 transitions. [2021-11-23 02:01:36,380 INFO L78 Accepts]: Start accepts. Automaton has 12227 states and 17850 transitions. Word has length 214 [2021-11-23 02:01:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:36,381 INFO L470 AbstractCegarLoop]: Abstraction has 12227 states and 17850 transitions. [2021-11-23 02:01:36,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:01:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 12227 states and 17850 transitions. [2021-11-23 02:01:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-23 02:01:36,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:36,387 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:36,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:01:36,387 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1544384157, now seen corresponding path program 1 times [2021-11-23 02:01:36,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:36,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090953948] [2021-11-23 02:01:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:36,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:01:36,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090953948] [2021-11-23 02:01:36,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090953948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:36,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:36,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:01:36,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308014286] [2021-11-23 02:01:36,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:36,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:01:36,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:01:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:36,795 INFO L87 Difference]: Start difference. First operand 12227 states and 17850 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:01:38,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:41,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:43,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:45,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:48,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:50,621 INFO L93 Difference]: Finished difference Result 36235 states and 52888 transitions. [2021-11-23 02:01:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:01:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 217 [2021-11-23 02:01:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:50,977 INFO L225 Difference]: With dead ends: 36235 [2021-11-23 02:01:50,977 INFO L226 Difference]: Without dead ends: 24055 [2021-11-23 02:01:51,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:51,051 INFO L933 BasicCegarLoop]: 4186 mSDtfsCounter, 2362 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2362 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:51,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2362 Valid, 6513 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 881 Invalid, 2 Unknown, 0 Unchecked, 13.2s Time] [2021-11-23 02:01:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24055 states. [2021-11-23 02:01:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24055 to 24021. [2021-11-23 02:01:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24021 states, 15217 states have (on average 1.341131629099034) internal successors, (20408), 15528 states have internal predecessors, (20408), 6866 states have call successors, (6866), 1936 states have call predecessors, (6866), 1937 states have return successors, (7777), 6649 states have call predecessors, (7777), 6857 states have call successors, (7777) [2021-11-23 02:01:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24021 states to 24021 states and 35051 transitions. [2021-11-23 02:01:52,510 INFO L78 Accepts]: Start accepts. Automaton has 24021 states and 35051 transitions. Word has length 217 [2021-11-23 02:01:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:52,511 INFO L470 AbstractCegarLoop]: Abstraction has 24021 states and 35051 transitions. [2021-11-23 02:01:52,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 02:01:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 24021 states and 35051 transitions. [2021-11-23 02:01:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 02:01:52,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:52,518 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:52,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:01:52,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash -839316636, now seen corresponding path program 1 times [2021-11-23 02:01:52,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:52,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203973590] [2021-11-23 02:01:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:52,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:01:52,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:52,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203973590] [2021-11-23 02:01:52,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203973590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:52,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:52,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:01:52,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677325594] [2021-11-23 02:01:52,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:52,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:01:52,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:01:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:52,976 INFO L87 Difference]: Start difference. First operand 24021 states and 35051 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:01:55,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:57,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:01,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:06,003 INFO L93 Difference]: Finished difference Result 70209 states and 104880 transitions. [2021-11-23 02:02:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 228 [2021-11-23 02:02:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:06,615 INFO L225 Difference]: With dead ends: 70209 [2021-11-23 02:02:06,616 INFO L226 Difference]: Without dead ends: 46235 [2021-11-23 02:02:06,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:06,920 INFO L933 BasicCegarLoop]: 3938 mSDtfsCounter, 2432 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2432 SdHoareTripleChecker+Valid, 6140 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:06,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2432 Valid, 6140 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 811 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2021-11-23 02:02:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46235 states. [2021-11-23 02:02:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46235 to 46032. [2021-11-23 02:02:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 29301 states have (on average 1.3446640046414797) internal successors, (39400), 29999 states have internal predecessors, (39400), 12966 states have call successors, (12966), 3804 states have call predecessors, (12966), 3764 states have return successors, (16106), 12397 states have call predecessors, (16106), 12952 states have call successors, (16106) [2021-11-23 02:02:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 68472 transitions. [2021-11-23 02:02:10,256 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 68472 transitions. Word has length 228 [2021-11-23 02:02:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:10,257 INFO L470 AbstractCegarLoop]: Abstraction has 46032 states and 68472 transitions. [2021-11-23 02:02:10,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:02:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 68472 transitions. [2021-11-23 02:02:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-23 02:02:10,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:10,265 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:10,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:02:10,266 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash -250457945, now seen corresponding path program 1 times [2021-11-23 02:02:10,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:10,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967349316] [2021-11-23 02:02:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:10,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:02:10,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967349316] [2021-11-23 02:02:10,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967349316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:10,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:10,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:02:10,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461568896] [2021-11-23 02:02:10,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:10,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:10,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:10,739 INFO L87 Difference]: Start difference. First operand 46032 states and 68472 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:02:12,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:14,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:17,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:18,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:25,731 INFO L93 Difference]: Finished difference Result 68074 states and 100531 transitions. [2021-11-23 02:02:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 229 [2021-11-23 02:02:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:26,155 INFO L225 Difference]: With dead ends: 68074 [2021-11-23 02:02:26,155 INFO L226 Difference]: Without dead ends: 68071 [2021-11-23 02:02:26,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:26,196 INFO L933 BasicCegarLoop]: 4185 mSDtfsCounter, 2368 mSDsluCounter, 2576 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2368 SdHoareTripleChecker+Valid, 6449 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:26,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2368 Valid, 6449 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 876 Invalid, 2 Unknown, 0 Unchecked, 13.3s Time] [2021-11-23 02:02:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68071 states. [2021-11-23 02:02:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68071 to 68040. [2021-11-23 02:02:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68040 states, 43299 states have (on average 1.3436338021663319) internal successors, (58178), 44321 states have internal predecessors, (58178), 19126 states have call successors, (19126), 5654 states have call predecessors, (19126), 5614 states have return successors, (23194), 18315 states have call predecessors, (23194), 19112 states have call successors, (23194) [2021-11-23 02:02:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68040 states to 68040 states and 100498 transitions. [2021-11-23 02:02:30,395 INFO L78 Accepts]: Start accepts. Automaton has 68040 states and 100498 transitions. Word has length 229 [2021-11-23 02:02:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:30,397 INFO L470 AbstractCegarLoop]: Abstraction has 68040 states and 100498 transitions. [2021-11-23 02:02:30,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:02:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 68040 states and 100498 transitions. [2021-11-23 02:02:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-23 02:02:30,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:30,404 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:30,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:02:30,405 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:30,405 INFO L85 PathProgramCache]: Analyzing trace with hash 824297159, now seen corresponding path program 1 times [2021-11-23 02:02:30,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:30,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446412456] [2021-11-23 02:02:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:30,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:02:30,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:30,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446412456] [2021-11-23 02:02:30,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446412456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:30,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:30,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:02:30,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226675895] [2021-11-23 02:02:30,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:30,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:30,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:30,884 INFO L87 Difference]: Start difference. First operand 68040 states and 100498 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:02:33,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:35,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:39,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:41,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:46,517 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:48,350 INFO L93 Difference]: Finished difference Result 68064 states and 100521 transitions. [2021-11-23 02:02:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:48,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 230 [2021-11-23 02:02:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:48,724 INFO L225 Difference]: With dead ends: 68064 [2021-11-23 02:02:48,724 INFO L226 Difference]: Without dead ends: 68061 [2021-11-23 02:02:48,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:48,757 INFO L933 BasicCegarLoop]: 4185 mSDtfsCounter, 2365 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2365 SdHoareTripleChecker+Valid, 6452 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:48,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2365 Valid, 6452 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 875 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2021-11-23 02:02:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68061 states. [2021-11-23 02:02:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68061 to 68041. [2021-11-23 02:02:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68041 states, 43300 states have (on average 1.3436258660508082) internal successors, (58179), 44322 states have internal predecessors, (58179), 19126 states have call successors, (19126), 5654 states have call predecessors, (19126), 5614 states have return successors, (23194), 18315 states have call predecessors, (23194), 19112 states have call successors, (23194) [2021-11-23 02:02:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68041 states to 68041 states and 100499 transitions. [2021-11-23 02:02:51,631 INFO L78 Accepts]: Start accepts. Automaton has 68041 states and 100499 transitions. Word has length 230 [2021-11-23 02:02:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:51,632 INFO L470 AbstractCegarLoop]: Abstraction has 68041 states and 100499 transitions. [2021-11-23 02:02:51,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:02:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 68041 states and 100499 transitions. [2021-11-23 02:02:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-23 02:02:51,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:51,638 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:51,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:02:51,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash -218028118, now seen corresponding path program 1 times [2021-11-23 02:02:51,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:51,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791179428] [2021-11-23 02:02:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:51,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:02:52,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:52,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791179428] [2021-11-23 02:02:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791179428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:52,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:52,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:02:52,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993928958] [2021-11-23 02:02:52,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:52,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:52,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:52,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:52,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:52,289 INFO L87 Difference]: Start difference. First operand 68041 states and 100499 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:02:54,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:56,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:59,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:02,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:06,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:08,076 INFO L93 Difference]: Finished difference Result 68073 states and 100552 transitions. [2021-11-23 02:03:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 231 [2021-11-23 02:03:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:08,409 INFO L225 Difference]: With dead ends: 68073 [2021-11-23 02:03:08,409 INFO L226 Difference]: Without dead ends: 68070 [2021-11-23 02:03:08,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:08,440 INFO L933 BasicCegarLoop]: 4185 mSDtfsCounter, 2361 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 6455 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:08,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 6455 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 873 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2021-11-23 02:03:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68070 states. [2021-11-23 02:03:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68070 to 68042. [2021-11-23 02:03:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68042 states, 43301 states have (on average 1.3436179303018405) internal successors, (58180), 44323 states have internal predecessors, (58180), 19126 states have call successors, (19126), 5654 states have call predecessors, (19126), 5614 states have return successors, (23194), 18315 states have call predecessors, (23194), 19112 states have call successors, (23194) [2021-11-23 02:03:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68042 states to 68042 states and 100500 transitions. [2021-11-23 02:03:11,402 INFO L78 Accepts]: Start accepts. Automaton has 68042 states and 100500 transitions. Word has length 231 [2021-11-23 02:03:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:11,403 INFO L470 AbstractCegarLoop]: Abstraction has 68042 states and 100500 transitions. [2021-11-23 02:03:11,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:03:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 68042 states and 100500 transitions. [2021-11-23 02:03:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-23 02:03:11,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:11,408 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:11,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:03:11,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1829631530, now seen corresponding path program 1 times [2021-11-23 02:03:11,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:11,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82169316] [2021-11-23 02:03:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:11,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:03:11,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:11,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82169316] [2021-11-23 02:03:11,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82169316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:11,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:11,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:11,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828635702] [2021-11-23 02:03:11,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:11,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:11,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:11,786 INFO L87 Difference]: Start difference. First operand 68042 states and 100500 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:03:13,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:15,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:19,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:25,907 INFO L93 Difference]: Finished difference Result 128430 states and 194129 transitions. [2021-11-23 02:03:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:25,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 232 [2021-11-23 02:03:25,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:26,869 INFO L225 Difference]: With dead ends: 128430 [2021-11-23 02:03:26,870 INFO L226 Difference]: Without dead ends: 128400 [2021-11-23 02:03:26,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:26,983 INFO L933 BasicCegarLoop]: 3845 mSDtfsCounter, 2435 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2435 SdHoareTripleChecker+Valid, 5993 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:26,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2435 Valid, 5993 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 800 Invalid, 3 Unknown, 0 Unchecked, 10.6s Time] [2021-11-23 02:03:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128400 states. [2021-11-23 02:03:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128400 to 128372. [2021-11-23 02:03:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128372 states, 82021 states have (on average 1.3443508369807733) internal successors, (110265), 84179 states have internal predecessors, (110265), 35582 states have call successors, (35582), 10992 states have call predecessors, (35582), 10768 states have return successors, (48160), 33679 states have call predecessors, (48160), 35564 states have call successors, (48160) [2021-11-23 02:03:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128372 states to 128372 states and 194007 transitions. [2021-11-23 02:03:33,783 INFO L78 Accepts]: Start accepts. Automaton has 128372 states and 194007 transitions. Word has length 232 [2021-11-23 02:03:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 128372 states and 194007 transitions. [2021-11-23 02:03:33,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:03:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 128372 states and 194007 transitions. [2021-11-23 02:03:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 02:03:33,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:33,789 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:33,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:03:33,789 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:33,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1047687908, now seen corresponding path program 1 times [2021-11-23 02:03:33,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:33,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421537880] [2021-11-23 02:03:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:33,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:03:34,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:34,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421537880] [2021-11-23 02:03:34,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421537880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:34,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:34,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:34,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126448238] [2021-11-23 02:03:34,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:34,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:34,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:34,303 INFO L87 Difference]: Start difference. First operand 128372 states and 194007 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:03:36,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:38,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:45,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:54,828 INFO L93 Difference]: Finished difference Result 315298 states and 479856 transitions. [2021-11-23 02:03:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 238 [2021-11-23 02:03:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:56,591 INFO L225 Difference]: With dead ends: 315298 [2021-11-23 02:03:56,591 INFO L226 Difference]: Without dead ends: 186957 [2021-11-23 02:03:57,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:57,212 INFO L933 BasicCegarLoop]: 3164 mSDtfsCounter, 2584 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2584 SdHoareTripleChecker+Valid, 5366 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:57,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2584 Valid, 5366 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 684 Invalid, 2 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 02:03:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186957 states.