./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-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P --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 7a2974a33527a9392dca8d355734fee3e0faaae6e14749128119c28fd0f37e8f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:12:44,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:12:44,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:12:44,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:12:44,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:12:44,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:12:44,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:12:44,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:12:44,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:12:44,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:12:44,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:12:44,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:12:44,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:12:44,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:12:44,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:12:44,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:12:44,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:12:44,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:12:44,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:12:44,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:12:44,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:12:44,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:12:44,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:12:44,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:12:44,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:12:44,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:12:44,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:12:44,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:12:44,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:12:44,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:12:44,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:12:44,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:12:44,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:12:44,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:12:44,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:12:44,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:12:44,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:12:44,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:12:44,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:12:44,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:12:44,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:12:44,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:12:44,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:12:44,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:12:44,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:12:44,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:12:44,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:12:44,894 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:12:44,894 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:12:44,894 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:12:44,894 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:12:44,895 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:12:44,896 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:12:44,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:12:44,896 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:12:44,896 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:12:44,896 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:12:44,897 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:12:44,897 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:12:44,897 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:12:44,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:12:44,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:12:44,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:12:44,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:12:44,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:12:44,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:12:44,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:12:44,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:12:44,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:12:44,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:12:44,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:12:44,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:12:44,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:12:44,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:12:44,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:12:44,903 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:12:44,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:12:44,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:12:44,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:12:44,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:12:44,904 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_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a2974a33527a9392dca8d355734fee3e0faaae6e14749128119c28fd0f37e8f [2021-11-21 01:12:45,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:12:45,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:12:45,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:12:45,250 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:12:45,251 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:12:45,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-21 01:12:45,345 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/data/bc1b3ad7c/94238d096419403e85df39f2be29c158/FLAGa9e9ca1db [2021-11-21 01:12:46,312 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:12:46,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-21 01:12:46,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/data/bc1b3ad7c/94238d096419403e85df39f2be29c158/FLAGa9e9ca1db [2021-11-21 01:12:46,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/data/bc1b3ad7c/94238d096419403e85df39f2be29c158 [2021-11-21 01:12:46,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:12:46,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:12:46,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:12:46,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:12:46,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:12:46,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:12:46" (1/1) ... [2021-11-21 01:12:46,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe7b1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:46, skipping insertion in model container [2021-11-21 01:12:46,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:12:46" (1/1) ... [2021-11-21 01:12:46,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:12:46,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:12:49,908 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_d3a7723c-11ee-461f-82bc-a22e3192b1a2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i[386204,386217] [2021-11-21 01:12:49,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:12:50,055 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:12:50,676 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_d3a7723c-11ee-461f-82bc-a22e3192b1a2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i[386204,386217] [2021-11-21 01:12:50,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:12:50,872 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:12:50,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50 WrapperNode [2021-11-21 01:12:50,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:12:50,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:12:50,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:12:50,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:12:50,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:51,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:51,463 INFO L137 Inliner]: procedures = 333, calls = 3594, calls flagged for inlining = 139, calls inlined = 136, statements flattened = 6651 [2021-11-21 01:12:51,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:12:51,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:12:51,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:12:51,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:12:51,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:51,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:51,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:51,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:51,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:51,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:52,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:52,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:12:52,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:12:52,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:12:52,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:12:52,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (1/1) ... [2021-11-21 01:12:52,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:12:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:12:52,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:12:52,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:12:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure disable_ast [2021-11-21 01:12:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_ast [2021-11-21 01:12:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-21 01:12:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-21 01:12:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure type3_infoblock [2021-11-21 01:12:52,229 INFO L138 BoogieDeclarations]: Found implementation of procedure type3_infoblock [2021-11-21 01:12:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:12:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:12:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:12:52,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:12:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_interrupt [2021-11-21 01:12:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_interrupt [2021-11-21 01:12:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:12:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:12:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure reset_init_sia [2021-11-21 01:12:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_init_sia [2021-11-21 01:12:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-21 01:12:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-21 01:12:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 01:12:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 01:12:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_alloc_rx_buff [2021-11-21 01:12:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_alloc_rx_buff [2021-11-21 01:12:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-21 01:12:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-21 01:12:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure test_for_100Mb [2021-11-21 01:12:52,233 INFO L138 BoogieDeclarations]: Found implementation of procedure test_for_100Mb [2021-11-21 01:12:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:12:52,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:12:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure type4_infoblock [2021-11-21 01:12:52,233 INFO L138 BoogieDeclarations]: Found implementation of procedure type4_infoblock [2021-11-21 01:12:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_put_cache [2021-11-21 01:12:52,234 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_put_cache [2021-11-21 01:12:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-21 01:12:52,234 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-21 01:12:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure type5_infoblock [2021-11-21 01:12:52,235 INFO L138 BoogieDeclarations]: Found implementation of procedure type5_infoblock [2021-11-21 01:12:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure load_packet [2021-11-21 01:12:52,235 INFO L138 BoogieDeclarations]: Found implementation of procedure load_packet [2021-11-21 01:12:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 01:12:52,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 01:12:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_mii [2021-11-21 01:12:52,236 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_mii [2021-11-21 01:12:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140m_autoconf [2021-11-21 01:12:52,236 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140m_autoconf [2021-11-21 01:12:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_switch_mac_port [2021-11-21 01:12:52,237 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_switch_mac_port [2021-11-21 01:12:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-21 01:12:52,237 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-21 01:12:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure srom_latch [2021-11-21 01:12:52,238 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_latch [2021-11-21 01:12:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure is_100_up [2021-11-21 01:12:52,239 INFO L138 BoogieDeclarations]: Found implementation of procedure is_100_up [2021-11-21 01:12:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_open [2021-11-21 01:12:52,239 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_open [2021-11-21 01:12:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:12:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:12:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ta [2021-11-21 01:12:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ta [2021-11-21 01:12:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2021-11-21 01:12:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2021-11-21 01:12:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:12:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:12:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 01:12:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 01:12:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_autoconf [2021-11-21 01:12:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_autoconf [2021-11-21 01:12:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le16 [2021-11-21 01:12:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le16 [2021-11-21 01:12:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 01:12:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 01:12:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure build_setup_frame [2021-11-21 01:12:52,243 INFO L138 BoogieDeclarations]: Found implementation of procedure build_setup_frame [2021-11-21 01:12:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure type2_infoblock [2021-11-21 01:12:52,243 INFO L138 BoogieDeclarations]: Found implementation of procedure type2_infoblock [2021-11-21 01:12:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure test_mii_reg [2021-11-21 01:12:52,243 INFO L138 BoogieDeclarations]: Found implementation of procedure test_mii_reg [2021-11-21 01:12:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure type0_infoblock [2021-11-21 01:12:52,244 INFO L138 BoogieDeclarations]: Found implementation of procedure type0_infoblock [2021-11-21 01:12:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_cache_state [2021-11-21 01:12:52,244 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_cache_state [2021-11-21 01:12:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-21 01:12:52,245 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-21 01:12:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:12:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_media [2021-11-21 01:12:52,245 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_media [2021-11-21 01:12:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2021-11-21 01:12:52,246 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2021-11-21 01:12:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 01:12:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure autoconf_media [2021-11-21 01:12:52,247 INFO L138 BoogieDeclarations]: Found implementation of procedure autoconf_media [2021-11-21 01:12:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_autoconf [2021-11-21 01:12:52,247 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_autoconf [2021-11-21 01:12:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure mii_rd [2021-11-21 01:12:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_rd [2021-11-21 01:12:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure DevicePresent [2021-11-21 01:12:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure DevicePresent [2021-11-21 01:12:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-21 01:12:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-21 01:12:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ast [2021-11-21 01:12:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ast [2021-11-21 01:12:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:12:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure dc21143_infoleaf [2021-11-21 01:12:52,250 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21143_infoleaf [2021-11-21 01:12:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-21 01:12:52,250 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-21 01:12:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 01:12:52,251 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 01:12:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-21 01:12:52,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-21 01:12:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 01:12:52,252 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 01:12:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le32 [2021-11-21 01:12:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le32 [2021-11-21 01:12:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-21 01:12:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_sw_reset [2021-11-21 01:12:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_sw_reset [2021-11-21 01:12:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:12:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-21 01:12:52,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-21 01:12:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-21 01:12:52,258 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-21 01:12:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:12:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure is_10_up [2021-11-21 01:12:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure is_10_up [2021-11-21 01:12:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-21 01:12:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-21 01:12:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-21 01:12:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-21 01:12:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure is_anc_capable [2021-11-21 01:12:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure is_anc_capable [2021-11-21 01:12:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-21 01:12:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-21 01:12:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure type1_infoblock [2021-11-21 01:12:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure type1_infoblock [2021-11-21 01:12:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-21 01:12:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-21 01:12:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 01:12:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 01:12:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-21 01:12:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-21 01:12:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure is_spd_100 [2021-11-21 01:12:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure is_spd_100 [2021-11-21 01:12:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140_infoleaf [2021-11-21 01:12:52,270 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140_infoleaf [2021-11-21 01:12:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 01:12:52,270 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 01:12:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-21 01:12:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-21 01:12:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-21 01:12:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-21 01:12:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_queue_pkt [2021-11-21 01:12:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_queue_pkt [2021-11-21 01:12:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:12:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_mii [2021-11-21 01:12:52,272 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_mii [2021-11-21 01:12:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure test_media [2021-11-21 01:12:52,272 INFO L138 BoogieDeclarations]: Found implementation of procedure test_media [2021-11-21 01:12:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_rx_buffs [2021-11-21 01:12:52,272 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_rx_buffs [2021-11-21 01:12:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-21 01:12:52,273 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-21 01:12:52,273 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-21 01:12:52,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-21 01:12:52,273 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-21 01:12:52,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-21 01:12:52,273 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buffs [2021-11-21 01:12:52,273 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buffs [2021-11-21 01:12:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:12:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2021-11-21 01:12:52,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2021-11-21 01:12:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-21 01:12:52,274 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-21 01:12:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:12:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 01:12:52,275 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 01:12:52,275 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-21 01:12:52,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-21 01:12:52,275 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2021-11-21 01:12:52,275 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2021-11-21 01:12:52,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:12:52,275 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:12:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init [2021-11-21 01:12:52,276 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init [2021-11-21 01:12:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure ping_media [2021-11-21 01:12:52,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ping_media [2021-11-21 01:12:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-21 01:12:52,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-21 01:12:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-21 01:12:52,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-21 01:12:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure srom_autoconf [2021-11-21 01:12:52,277 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_autoconf [2021-11-21 01:12:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:12:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure srom_exec [2021-11-21 01:12:52,277 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_exec [2021-11-21 01:12:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-21 01:12:52,278 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-21 01:12:52,278 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-21 01:12:52,278 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-21 01:12:52,278 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:12:52,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:12:52,278 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_tx [2021-11-21 01:12:52,278 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_tx [2021-11-21 01:12:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 01:12:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 01:12:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure gep_wr [2021-11-21 01:12:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_wr [2021-11-21 01:12:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-21 01:12:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-21 01:12:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure srom_rd [2021-11-21 01:12:52,280 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_rd [2021-11-21 01:12:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:12:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-21 01:12:52,280 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-21 01:12:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_srom [2021-11-21 01:12:52,280 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_srom [2021-11-21 01:12:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 01:12:52,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 01:12:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure SetMulticastFilter [2021-11-21 01:12:52,281 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMulticastFilter [2021-11-21 01:12:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-21 01:12:52,281 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-21 01:12:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:12:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ioctl [2021-11-21 01:12:52,282 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ioctl [2021-11-21 01:12:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_cache [2021-11-21 01:12:52,282 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_cache [2021-11-21 01:12:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:12:52,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:12:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:12:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-21 01:12:52,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-21 01:12:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_srom [2021-11-21 01:12:52,283 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_srom [2021-11-21 01:12:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_3 [2021-11-21 01:12:52,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_3 [2021-11-21 01:12:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-11-21 01:12:52,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-11-21 01:12:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:12:52,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:12:52,288 INFO L130 BoogieDeclarations]: Found specification of procedure mii_swap [2021-11-21 01:12:52,288 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_swap [2021-11-21 01:12:52,289 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_suspect_state [2021-11-21 01:12:52,289 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_suspect_state [2021-11-21 01:12:52,289 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_mii [2021-11-21 01:12:52,289 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_mii [2021-11-21 01:12:52,289 INFO L130 BoogieDeclarations]: Found specification of procedure compact_infoblock [2021-11-21 01:12:52,289 INFO L138 BoogieDeclarations]: Found implementation of procedure compact_infoblock [2021-11-21 01:12:52,289 INFO L130 BoogieDeclarations]: Found specification of procedure gep_rd [2021-11-21 01:12:52,290 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_rd [2021-11-21 01:12:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure mii_address [2021-11-21 01:12:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_address [2021-11-21 01:12:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_reset_phy [2021-11-21 01:12:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_reset_phy [2021-11-21 01:12:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_putb_cache [2021-11-21 01:12:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_putb_cache [2021-11-21 01:12:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buff [2021-11-21 01:12:52,292 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buff [2021-11-21 01:12:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_setup_intr [2021-11-21 01:12:52,292 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_setup_intr [2021-11-21 01:12:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure dc21142_infoleaf [2021-11-21 01:12:52,292 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21142_infoleaf [2021-11-21 01:12:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_stats [2021-11-21 01:12:52,292 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_stats [2021-11-21 01:12:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_save_skbs [2021-11-21 01:12:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_save_skbs [2021-11-21 01:12:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure dc2114x_autoconf [2021-11-21 01:12:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure dc2114x_autoconf [2021-11-21 01:12:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-21 01:12:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-21 01:12:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-21 01:12:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-21 01:12:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure srom_map_media [2021-11-21 01:12:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_map_media [2021-11-21 01:12:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-21 01:12:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-21 01:12:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_close [2021-11-21 01:12:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_close [2021-11-21 01:12:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure yawn [2021-11-21 01:12:52,295 INFO L138 BoogieDeclarations]: Found implementation of procedure yawn [2021-11-21 01:12:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wdata [2021-11-21 01:12:52,295 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wdata [2021-11-21 01:12:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:12:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init_connection [2021-11-21 01:12:52,295 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init_connection [2021-11-21 01:12:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wr [2021-11-21 01:12:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wr [2021-11-21 01:12:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-21 01:12:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:12:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:12:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_state [2021-11-21 01:12:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_state [2021-11-21 01:12:53,325 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:12:53,339 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:12:53,771 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:13:08,321 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:13:11,503 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:13:11,503 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-21 01:13:11,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:13:11 BoogieIcfgContainer [2021-11-21 01:13:11,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:13:11,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:13:11,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:13:11,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:13:11,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:12:46" (1/3) ... [2021-11-21 01:13:11,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba6e08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:13:11, skipping insertion in model container [2021-11-21 01:13:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:12:50" (2/3) ... [2021-11-21 01:13:11,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba6e08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:13:11, skipping insertion in model container [2021-11-21 01:13:11,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:13:11" (3/3) ... [2021-11-21 01:13:11,524 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-21 01:13:11,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:13:11,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:13:11,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:13:11,639 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 [2021-11-21 01:13:11,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:13:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 2706 states, 1731 states have (on average 1.3575967648757943) internal successors, (2350), 1793 states have internal predecessors, (2350), 854 states have call successors, (854), 136 states have call predecessors, (854), 135 states have return successors, (846), 835 states have call predecessors, (846), 846 states have call successors, (846) [2021-11-21 01:13:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 01:13:11,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:11,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:11,776 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1596020278, now seen corresponding path program 1 times [2021-11-21 01:13:11,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:11,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126761886] [2021-11-21 01:13:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:11,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-21 01:13:12,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126761886] [2021-11-21 01:13:12,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126761886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:12,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:12,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:13:12,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850092669] [2021-11-21 01:13:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:12,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:13:12,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:13:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:13:12,677 INFO L87 Difference]: Start difference. First operand has 2706 states, 1731 states have (on average 1.3575967648757943) internal successors, (2350), 1793 states have internal predecessors, (2350), 854 states have call successors, (854), 136 states have call predecessors, (854), 135 states have return successors, (846), 835 states have call predecessors, (846), 846 states have call successors, (846) 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:13:14,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:13:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:20,655 INFO L93 Difference]: Finished difference Result 7765 states and 11873 transitions. [2021-11-21 01:13:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:13:20,658 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2021-11-21 01:13:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:20,753 INFO L225 Difference]: With dead ends: 7765 [2021-11-21 01:13:20,754 INFO L226 Difference]: Without dead ends: 5051 [2021-11-21 01:13:20,801 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 [2021-11-21 01:13:20,807 INFO L933 BasicCegarLoop]: 4430 mSDtfsCounter, 3578 mSDsluCounter, 3874 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3578 SdHoareTripleChecker+Valid, 7930 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:20,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3578 Valid, 7930 Invalid, 850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 843 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2021-11-21 01:13:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-11-21 01:13:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 5045. [2021-11-21 01:13:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 3207 states have (on average 1.3489242282507017) internal successors, (4326), 3284 states have internal predecessors, (4326), 1578 states have call successors, (1578), 260 states have call predecessors, (1578), 259 states have return successors, (1577), 1555 states have call predecessors, (1577), 1577 states have call successors, (1577) [2021-11-21 01:13:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 7481 transitions. [2021-11-21 01:13:21,446 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 7481 transitions. Word has length 102 [2021-11-21 01:13:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:21,447 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 7481 transitions. [2021-11-21 01:13:21,448 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:13:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 7481 transitions. [2021-11-21 01:13:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-21 01:13:21,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:21,460 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:21,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:13:21,461 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:21,463 INFO L85 PathProgramCache]: Analyzing trace with hash -631487762, now seen corresponding path program 1 times [2021-11-21 01:13:21,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:21,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116546864] [2021-11-21 01:13:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:21,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:13:21,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:21,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116546864] [2021-11-21 01:13:21,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116546864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:21,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:21,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:21,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675383972] [2021-11-21 01:13:21,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:21,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:21,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:21,781 INFO L87 Difference]: Start difference. First operand 5045 states and 7481 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:13:23,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:13:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:33,651 INFO L93 Difference]: Finished difference Result 15121 states and 22576 transitions. [2021-11-21 01:13:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:13:33,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 131 [2021-11-21 01:13:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:33,767 INFO L225 Difference]: With dead ends: 15121 [2021-11-21 01:13:33,767 INFO L226 Difference]: Without dead ends: 10093 [2021-11-21 01:13:33,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:13:33,818 INFO L933 BasicCegarLoop]: 4812 mSDtfsCounter, 3917 mSDsluCounter, 14453 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 18026 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:33,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 18026 Invalid, 1707 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1703 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2021-11-21 01:13:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2021-11-21 01:13:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 10064. [2021-11-21 01:13:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10064 states, 6402 states have (on average 1.3495782567947516) internal successors, (8640), 6560 states have internal predecessors, (8640), 3144 states have call successors, (3144), 518 states have call predecessors, (3144), 517 states have return successors, (3288), 3091 states have call predecessors, (3288), 3143 states have call successors, (3288) [2021-11-21 01:13:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10064 states to 10064 states and 15072 transitions. [2021-11-21 01:13:34,602 INFO L78 Accepts]: Start accepts. Automaton has 10064 states and 15072 transitions. Word has length 131 [2021-11-21 01:13:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:34,603 INFO L470 AbstractCegarLoop]: Abstraction has 10064 states and 15072 transitions. [2021-11-21 01:13:34,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:13:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10064 states and 15072 transitions. [2021-11-21 01:13:34,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:13:34,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:34,609 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:34,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:13:34,609 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash 414724431, now seen corresponding path program 1 times [2021-11-21 01:13:34,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:34,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492254950] [2021-11-21 01:13:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:34,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:13:34,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492254950] [2021-11-21 01:13:34,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492254950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:34,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:34,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:34,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683190485] [2021-11-21 01:13:34,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:34,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:34,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:34,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:34,875 INFO L87 Difference]: Start difference. First operand 10064 states and 15072 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:13:36,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:13:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:45,380 INFO L93 Difference]: Finished difference Result 30202 states and 45238 transitions. [2021-11-21 01:13:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:13:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 134 [2021-11-21 01:13:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:45,560 INFO L225 Difference]: With dead ends: 30202 [2021-11-21 01:13:45,560 INFO L226 Difference]: Without dead ends: 20155 [2021-11-21 01:13:45,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:13:45,646 INFO L933 BasicCegarLoop]: 4568 mSDtfsCounter, 3918 mSDsluCounter, 13858 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3922 SdHoareTripleChecker+Valid, 17219 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:45,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3922 Valid, 17219 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1645 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2021-11-21 01:13:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2021-11-21 01:13:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20112. [2021-11-21 01:13:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20112 states, 12794 states have (on average 1.349851492887291) internal successors, (17270), 13126 states have internal predecessors, (17270), 6280 states have call successors, (6280), 1038 states have call predecessors, (6280), 1037 states have return successors, (6569), 6159 states have call predecessors, (6569), 6279 states have call successors, (6569) [2021-11-21 01:13:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20112 states to 20112 states and 30119 transitions. [2021-11-21 01:13:47,003 INFO L78 Accepts]: Start accepts. Automaton has 20112 states and 30119 transitions. Word has length 134 [2021-11-21 01:13:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 20112 states and 30119 transitions. [2021-11-21 01:13:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:13:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 20112 states and 30119 transitions. [2021-11-21 01:13:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-21 01:13:47,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:47,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:47,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:13:47,010 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1535226547, now seen corresponding path program 1 times [2021-11-21 01:13:47,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823752067] [2021-11-21 01:13:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:47,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:13:47,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:47,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823752067] [2021-11-21 01:13:47,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823752067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:47,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:47,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047439801] [2021-11-21 01:13:47,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:47,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:47,282 INFO L87 Difference]: Start difference. First operand 20112 states and 30119 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:13:49,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:13:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:54,927 INFO L93 Difference]: Finished difference Result 31511 states and 46984 transitions. [2021-11-21 01:13:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:13:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 135 [2021-11-21 01:13:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:55,054 INFO L225 Difference]: With dead ends: 31511 [2021-11-21 01:13:55,054 INFO L226 Difference]: Without dead ends: 20176 [2021-11-21 01:13:55,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:13:55,117 INFO L933 BasicCegarLoop]: 3546 mSDtfsCounter, 3912 mSDsluCounter, 7837 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3916 SdHoareTripleChecker+Valid, 10625 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:55,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3916 Valid, 10625 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1155 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-21 01:13:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20176 states. [2021-11-21 01:13:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20176 to 20128. [2021-11-21 01:13:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 12810 states have (on average 1.3494145199063232) internal successors, (17286), 13138 states have internal predecessors, (17286), 6276 states have call successors, (6276), 1042 states have call predecessors, (6276), 1041 states have return successors, (6565), 6159 states have call predecessors, (6565), 6275 states have call successors, (6565) [2021-11-21 01:13:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 30127 transitions. [2021-11-21 01:13:56,910 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 30127 transitions. Word has length 135 [2021-11-21 01:13:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:56,911 INFO L470 AbstractCegarLoop]: Abstraction has 20128 states and 30127 transitions. [2021-11-21 01:13:56,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:13:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 30127 transitions. [2021-11-21 01:13:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-21 01:13:56,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:56,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:56,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:13:56,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash -803598729, now seen corresponding path program 1 times [2021-11-21 01:13:56,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:56,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874308160] [2021-11-21 01:13:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:56,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:13:57,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874308160] [2021-11-21 01:13:57,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874308160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:57,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:57,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:57,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211019744] [2021-11-21 01:13:57,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:57,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:57,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:57,162 INFO L87 Difference]: Start difference. First operand 20128 states and 30127 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:13:59,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:14:07,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:14:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:09,889 INFO L93 Difference]: Finished difference Result 41614 states and 62093 transitions. [2021-11-21 01:14:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:14:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 132 [2021-11-21 01:14:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:10,084 INFO L225 Difference]: With dead ends: 41614 [2021-11-21 01:14:10,085 INFO L226 Difference]: Without dead ends: 30263 [2021-11-21 01:14:10,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:10,277 INFO L933 BasicCegarLoop]: 4404 mSDtfsCounter, 3913 mSDsluCounter, 13527 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3917 SdHoareTripleChecker+Valid, 16800 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:10,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3917 Valid, 16800 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1536 Invalid, 2 Unknown, 0 Unchecked, 11.7s Time] [2021-11-21 01:14:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30263 states. [2021-11-21 01:14:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30263 to 30188. [2021-11-21 01:14:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30188 states, 19224 states have (on average 1.349250936329588) internal successors, (25938), 19700 states have internal predecessors, (25938), 9402 states have call successors, (9402), 1562 states have call predecessors, (9402), 1561 states have return successors, (9981), 9239 states have call predecessors, (9981), 9401 states have call successors, (9981) [2021-11-21 01:14:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30188 states to 30188 states and 45321 transitions. [2021-11-21 01:14:12,596 INFO L78 Accepts]: Start accepts. Automaton has 30188 states and 45321 transitions. Word has length 132 [2021-11-21 01:14:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:12,597 INFO L470 AbstractCegarLoop]: Abstraction has 30188 states and 45321 transitions. [2021-11-21 01:14:12,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 30188 states and 45321 transitions. [2021-11-21 01:14:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-21 01:14:12,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:12,611 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:12,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:14:12,612 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -788905108, now seen corresponding path program 1 times [2021-11-21 01:14:12,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:12,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823092869] [2021-11-21 01:14:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:12,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:14:12,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:12,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823092869] [2021-11-21 01:14:12,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823092869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:12,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:12,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:14:12,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650975879] [2021-11-21 01:14:12,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:12,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:14:12,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:14:12,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:12,809 INFO L87 Difference]: Start difference. First operand 30188 states and 45321 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:14,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:14:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:22,664 INFO L93 Difference]: Finished difference Result 47318 states and 70701 transitions. [2021-11-21 01:14:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:14:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 136 [2021-11-21 01:14:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:22,856 INFO L225 Difference]: With dead ends: 47318 [2021-11-21 01:14:22,856 INFO L226 Difference]: Without dead ends: 30284 [2021-11-21 01:14:23,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:23,107 INFO L933 BasicCegarLoop]: 3546 mSDtfsCounter, 3910 mSDsluCounter, 7837 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3914 SdHoareTripleChecker+Valid, 10625 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:23,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3914 Valid, 10625 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1155 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-21 01:14:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30284 states. [2021-11-21 01:14:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30284 to 30212. [2021-11-21 01:14:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 19248 states have (on average 1.3488154613466334) internal successors, (25962), 19718 states have internal predecessors, (25962), 9396 states have call successors, (9396), 1568 states have call predecessors, (9396), 1567 states have return successors, (9975), 9239 states have call predecessors, (9975), 9395 states have call successors, (9975) [2021-11-21 01:14:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 45333 transitions. [2021-11-21 01:14:25,145 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 45333 transitions. Word has length 136 [2021-11-21 01:14:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:25,147 INFO L470 AbstractCegarLoop]: Abstraction has 30212 states and 45333 transitions. [2021-11-21 01:14:25,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 45333 transitions. [2021-11-21 01:14:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:14:25,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:25,154 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:25,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:14:25,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash -778811797, now seen corresponding path program 1 times [2021-11-21 01:14:25,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:25,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979631837] [2021-11-21 01:14:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:25,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:14:25,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:25,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979631837] [2021-11-21 01:14:25,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979631837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:25,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:25,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:14:25,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014469993] [2021-11-21 01:14:25,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:25,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:14:25,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:14:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:25,393 INFO L87 Difference]: Start difference. First operand 30212 states and 45333 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:27,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:14:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:36,562 INFO L93 Difference]: Finished difference Result 51734 states and 77315 transitions. [2021-11-21 01:14:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:14:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 133 [2021-11-21 01:14:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:36,732 INFO L225 Difference]: With dead ends: 51734 [2021-11-21 01:14:36,732 INFO L226 Difference]: Without dead ends: 30303 [2021-11-21 01:14:36,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:36,846 INFO L933 BasicCegarLoop]: 4404 mSDtfsCounter, 3911 mSDsluCounter, 13527 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3915 SdHoareTripleChecker+Valid, 16800 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:36,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3915 Valid, 16800 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1537 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2021-11-21 01:14:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30303 states. [2021-11-21 01:14:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30303 to 30228. [2021-11-21 01:14:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30228 states, 19264 states have (on average 1.3485257475083057) internal successors, (25978), 19730 states have internal predecessors, (25978), 9392 states have call successors, (9392), 1572 states have call predecessors, (9392), 1571 states have return successors, (9971), 9239 states have call predecessors, (9971), 9391 states have call successors, (9971) [2021-11-21 01:14:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30228 states to 30228 states and 45341 transitions. [2021-11-21 01:14:38,935 INFO L78 Accepts]: Start accepts. Automaton has 30228 states and 45341 transitions. Word has length 133 [2021-11-21 01:14:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:38,936 INFO L470 AbstractCegarLoop]: Abstraction has 30228 states and 45341 transitions. [2021-11-21 01:14:38,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30228 states and 45341 transitions. [2021-11-21 01:14:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:14:38,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:38,943 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:38,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:14:38,943 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1054842708, now seen corresponding path program 1 times [2021-11-21 01:14:38,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:38,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667120597] [2021-11-21 01:14:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:38,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:14:39,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:39,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667120597] [2021-11-21 01:14:39,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667120597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:39,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:39,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:14:39,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583205744] [2021-11-21 01:14:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:39,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:14:39,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:14:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:39,144 INFO L87 Difference]: Start difference. First operand 30228 states and 45341 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:41,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:14:44,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:14:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:54,598 INFO L93 Difference]: Finished difference Result 51714 states and 77267 transitions. [2021-11-21 01:14:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:14:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 134 [2021-11-21 01:14:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:54,738 INFO L225 Difference]: With dead ends: 51714 [2021-11-21 01:14:54,738 INFO L226 Difference]: Without dead ends: 30263 [2021-11-21 01:14:54,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:54,912 INFO L933 BasicCegarLoop]: 4404 mSDtfsCounter, 3909 mSDsluCounter, 13527 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3913 SdHoareTripleChecker+Valid, 16800 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:54,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3913 Valid, 16800 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1536 Invalid, 2 Unknown, 0 Unchecked, 14.2s Time] [2021-11-21 01:14:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30263 states. [2021-11-21 01:14:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30263 to 30200. [2021-11-21 01:14:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30200 states, 19244 states have (on average 1.3482643940968613) internal successors, (25946), 19706 states have internal predecessors, (25946), 9384 states have call successors, (9384), 1572 states have call predecessors, (9384), 1571 states have return successors, (9963), 9235 states have call predecessors, (9963), 9383 states have call successors, (9963) [2021-11-21 01:14:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30200 states to 30200 states and 45293 transitions. [2021-11-21 01:14:56,696 INFO L78 Accepts]: Start accepts. Automaton has 30200 states and 45293 transitions. Word has length 134 [2021-11-21 01:14:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:56,696 INFO L470 AbstractCegarLoop]: Abstraction has 30200 states and 45293 transitions. [2021-11-21 01:14:56,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:56,697 INFO L276 IsEmpty]: Start isEmpty. Operand 30200 states and 45293 transitions. [2021-11-21 01:14:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 01:14:56,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:56,703 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:56,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:14:56,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1937482634, now seen corresponding path program 1 times [2021-11-21 01:14:56,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956346153] [2021-11-21 01:14:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:56,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:14:56,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:56,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956346153] [2021-11-21 01:14:56,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956346153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:56,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:56,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:14:56,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904975516] [2021-11-21 01:14:56,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:56,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:14:56,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:14:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:56,879 INFO L87 Difference]: Start difference. First operand 30200 states and 45293 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:14:58,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:06,709 INFO L93 Difference]: Finished difference Result 46963 states and 70110 transitions. [2021-11-21 01:15:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:15:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 137 [2021-11-21 01:15:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:06,840 INFO L225 Difference]: With dead ends: 46963 [2021-11-21 01:15:06,840 INFO L226 Difference]: Without dead ends: 29905 [2021-11-21 01:15:06,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:06,905 INFO L933 BasicCegarLoop]: 3546 mSDtfsCounter, 3908 mSDsluCounter, 7837 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3912 SdHoareTripleChecker+Valid, 10625 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:06,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3912 Valid, 10625 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1155 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-21 01:15:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29905 states. [2021-11-21 01:15:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29905 to 29851. [2021-11-21 01:15:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29851 states, 19017 states have (on average 1.3481095861597518) internal successors, (25637), 19469 states have internal predecessors, (25637), 9273 states have call successors, (9273), 1561 states have call predecessors, (9273), 1560 states have return successors, (9852), 9131 states have call predecessors, (9852), 9272 states have call successors, (9852) [2021-11-21 01:15:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29851 states to 29851 states and 44762 transitions. [2021-11-21 01:15:08,465 INFO L78 Accepts]: Start accepts. Automaton has 29851 states and 44762 transitions. Word has length 137 [2021-11-21 01:15:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:08,465 INFO L470 AbstractCegarLoop]: Abstraction has 29851 states and 44762 transitions. [2021-11-21 01:15:08,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:15:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29851 states and 44762 transitions. [2021-11-21 01:15:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:15:08,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:08,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:08,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:15:08,472 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash -574949944, now seen corresponding path program 1 times [2021-11-21 01:15:08,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:08,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226421580] [2021-11-21 01:15:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:08,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-21 01:15:08,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226421580] [2021-11-21 01:15:08,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226421580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218306003] [2021-11-21 01:15:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:08,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:08,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:08,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:08,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:15:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:15:10,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:15:10,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:15:10,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218306003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:10,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:15:10,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-21 01:15:10,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024327623] [2021-11-21 01:15:10,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:10,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:15:10,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:15:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:15:10,538 INFO L87 Difference]: Start difference. First operand 29851 states and 44762 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:15:12,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:18,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:39,339 INFO L93 Difference]: Finished difference Result 69922 states and 104921 transitions. [2021-11-21 01:15:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:15:39,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 144 [2021-11-21 01:15:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:39,552 INFO L225 Difference]: With dead ends: 69922 [2021-11-21 01:15:39,552 INFO L226 Difference]: Without dead ends: 49767 [2021-11-21 01:15:39,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:15:39,630 INFO L933 BasicCegarLoop]: 6771 mSDtfsCounter, 3917 mSDsluCounter, 33984 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 37466 SdHoareTripleChecker+Invalid, 4099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:39,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 37466 Invalid, 4099 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4097 Invalid, 1 Unknown, 0 Unchecked, 26.9s Time] [2021-11-21 01:15:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49767 states. [2021-11-21 01:15:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49767 to 49636. [2021-11-21 01:15:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49636 states, 31632 states have (on average 1.3485078401618613) internal successors, (42656), 32396 states have internal predecessors, (42656), 15406 states have call successors, (15406), 2590 states have call predecessors, (15406), 2597 states have return successors, (16585), 15161 states have call predecessors, (16585), 15405 states have call successors, (16585) [2021-11-21 01:15:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49636 states to 49636 states and 74647 transitions. [2021-11-21 01:15:42,672 INFO L78 Accepts]: Start accepts. Automaton has 49636 states and 74647 transitions. Word has length 144 [2021-11-21 01:15:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:42,672 INFO L470 AbstractCegarLoop]: Abstraction has 49636 states and 74647 transitions. [2021-11-21 01:15:42,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:15:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 49636 states and 74647 transitions. [2021-11-21 01:15:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 01:15:42,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:42,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:42,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:15:42,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:42,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:42,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1082106170, now seen corresponding path program 1 times [2021-11-21 01:15:42,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:42,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713129050] [2021-11-21 01:15:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:42,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:15:43,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:43,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713129050] [2021-11-21 01:15:43,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713129050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:43,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516072582] [2021-11-21 01:15:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:43,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:43,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:43,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:15:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:44,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:15:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:15:44,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:15:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516072582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:44,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:15:44,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 01:15:44,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299463365] [2021-11-21 01:15:44,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:44,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:15:44,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:15:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:15:44,597 INFO L87 Difference]: Start difference. First operand 49636 states and 74647 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:15:46,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:12,178 INFO L93 Difference]: Finished difference Result 109536 states and 164731 transitions. [2021-11-21 01:16:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:16:12,179 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 145 [2021-11-21 01:16:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:12,679 INFO L225 Difference]: With dead ends: 109536 [2021-11-21 01:16:12,679 INFO L226 Difference]: Without dead ends: 69596 [2021-11-21 01:16:12,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:16:12,826 INFO L933 BasicCegarLoop]: 6887 mSDtfsCounter, 3917 mSDsluCounter, 34396 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 38034 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:12,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 38034 Invalid, 4050 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4048 Invalid, 1 Unknown, 0 Unchecked, 25.2s Time] [2021-11-21 01:16:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69596 states. [2021-11-21 01:16:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69596 to 69441. [2021-11-21 01:16:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69441 states, 44259 states have (on average 1.3485844686956325) internal successors, (59687), 45347 states have internal predecessors, (59687), 21539 states have call successors, (21539), 3619 states have call predecessors, (21539), 3642 states have return successors, (23330), 21187 states have call predecessors, (23330), 21538 states have call successors, (23330) [2021-11-21 01:16:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69441 states to 69441 states and 104556 transitions. [2021-11-21 01:16:16,836 INFO L78 Accepts]: Start accepts. Automaton has 69441 states and 104556 transitions. Word has length 145 [2021-11-21 01:16:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:16,841 INFO L470 AbstractCegarLoop]: Abstraction has 69441 states and 104556 transitions. [2021-11-21 01:16:16,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:16:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 69441 states and 104556 transitions. [2021-11-21 01:16:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 01:16:16,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:16,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:16,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:16:17,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:16:17,064 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2117425631, now seen corresponding path program 1 times [2021-11-21 01:16:17,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744810137] [2021-11-21 01:16:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:17,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:16:17,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:17,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744810137] [2021-11-21 01:16:17,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744810137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:17,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924129573] [2021-11-21 01:16:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:17,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:17,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:17,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:17,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:16:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 2649 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:16:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:16:18,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:16:18,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924129573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:18,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:16:18,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 01:16:18,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907719214] [2021-11-21 01:16:18,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:18,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:16:18,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:16:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:16:18,730 INFO L87 Difference]: Start difference. First operand 69441 states and 104556 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:16:20,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:27,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:37,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:38,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:50,671 INFO L93 Difference]: Finished difference Result 149138 states and 224533 transitions. [2021-11-21 01:16:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:16:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 146 [2021-11-21 01:16:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:51,308 INFO L225 Difference]: With dead ends: 149138 [2021-11-21 01:16:51,308 INFO L226 Difference]: Without dead ends: 89393 [2021-11-21 01:16:51,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:16:51,516 INFO L933 BasicCegarLoop]: 7065 mSDtfsCounter, 3917 mSDsluCounter, 35252 mSDsCounter, 0 mSdLazyCounter, 4228 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 38924 SdHoareTripleChecker+Invalid, 4231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:51,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 38924 Invalid, 4231 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4228 Invalid, 2 Unknown, 0 Unchecked, 28.9s Time] [2021-11-21 01:16:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89393 states. [2021-11-21 01:16:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89393 to 69445. [2021-11-21 01:16:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69445 states, 44263 states have (on average 1.348552967489777) internal successors, (59691), 45347 states have internal predecessors, (59691), 21539 states have call successors, (21539), 3619 states have call predecessors, (21539), 3642 states have return successors, (23330), 21191 states have call predecessors, (23330), 21538 states have call successors, (23330) [2021-11-21 01:16:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69445 states to 69445 states and 104560 transitions. [2021-11-21 01:16:56,039 INFO L78 Accepts]: Start accepts. Automaton has 69445 states and 104560 transitions. Word has length 146 [2021-11-21 01:16:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:56,039 INFO L470 AbstractCegarLoop]: Abstraction has 69445 states and 104560 transitions. [2021-11-21 01:16:56,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:16:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 69445 states and 104560 transitions. [2021-11-21 01:16:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:16:56,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:56,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:56,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 01:16:56,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:16:56,261 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1252360141, now seen corresponding path program 1 times [2021-11-21 01:16:56,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:56,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709439933] [2021-11-21 01:16:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:56,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:16:56,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709439933] [2021-11-21 01:16:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709439933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:56,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784837887] [2021-11-21 01:16:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:56,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:56,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:56,538 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:56,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:16:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:57,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:16:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:16:58,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:16:58,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784837887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:58,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:16:58,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 01:16:58,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628395976] [2021-11-21 01:16:58,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:58,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:16:58,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:16:58,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:16:58,295 INFO L87 Difference]: Start difference. First operand 69445 states and 104560 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:17:00,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:06,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:13,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:17:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:33,527 INFO L93 Difference]: Finished difference Result 149150 states and 224553 transitions. [2021-11-21 01:17:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:17:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-11-21 01:17:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:34,191 INFO L225 Difference]: With dead ends: 149150 [2021-11-21 01:17:34,191 INFO L226 Difference]: Without dead ends: 89401 [2021-11-21 01:17:34,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:17:34,445 INFO L933 BasicCegarLoop]: 7065 mSDtfsCounter, 3916 mSDsluCounter, 35243 mSDsCounter, 0 mSdLazyCounter, 4218 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3922 SdHoareTripleChecker+Valid, 38924 SdHoareTripleChecker+Invalid, 4221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4218 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:34,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3922 Valid, 38924 Invalid, 4221 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4218 Invalid, 2 Unknown, 0 Unchecked, 31.8s Time] [2021-11-21 01:17:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2021-11-21 01:17:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 89134. [2021-11-21 01:17:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89134 states, 56802 states have (on average 1.348860955600155) internal successors, (76618), 58190 states have internal predecessors, (76618), 27664 states have call successors, (27664), 4640 states have call predecessors, (27664), 4667 states have return successors, (30055), 27217 states have call predecessors, (30055), 27663 states have call successors, (30055) [2021-11-21 01:17:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89134 states to 89134 states and 134337 transitions. [2021-11-21 01:17:40,006 INFO L78 Accepts]: Start accepts. Automaton has 89134 states and 134337 transitions. Word has length 147 [2021-11-21 01:17:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:40,006 INFO L470 AbstractCegarLoop]: Abstraction has 89134 states and 134337 transitions. [2021-11-21 01:17:40,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:17:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 89134 states and 134337 transitions. [2021-11-21 01:17:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 01:17:40,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:40,020 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:40,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:40,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:17:40,233 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:17:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash 432492216, now seen corresponding path program 1 times [2021-11-21 01:17:40,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:40,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311010003] [2021-11-21 01:17:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:40,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 01:17:40,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:40,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311010003] [2021-11-21 01:17:40,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311010003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:17:40,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294993894] [2021-11-21 01:17:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:40,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:17:40,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:17:40,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:17:40,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a7723c-11ee-461f-82bc-a22e3192b1a2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:17:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:17:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:17:41,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:17:41,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294993894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:41,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:17:41,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-21 01:17:41,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867985416] [2021-11-21 01:17:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:17:41,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:17:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:17:41,887 INFO L87 Difference]: Start difference. First operand 89134 states and 134337 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:17:43,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []