./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.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_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/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_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/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_d1a2f351-2951-4ff5-b905-1af68a055a02/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 2d96d66163c8e8d61a2fa90f8dc8359a87f83533e82cd74c25a40ad0f5e1f460 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:20:02,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:20:02,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:20:02,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:20:02,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:20:02,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:20:02,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:20:02,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:20:02,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:20:02,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:20:02,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:20:02,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:20:02,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:20:02,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:20:02,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:20:02,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:20:02,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:20:02,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:20:02,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:20:02,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:20:02,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:20:02,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:20:02,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:20:02,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:20:02,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:20:02,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:20:02,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:20:02,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:20:02,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:20:02,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:20:02,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:20:02,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:20:02,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:20:02,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:20:02,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:20:02,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:20:02,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:20:02,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:20:02,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:20:02,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:20:02,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:20:02,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:20:02,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:20:02,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:20:02,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:20:02,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:20:02,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:20:02,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:20:02,206 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:20:02,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:20:02,206 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:20:02,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:20:02,207 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:20:02,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:20:02,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:20:02,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:20:02,208 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:20:02,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:20:02,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:20:02,209 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:20:02,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:20:02,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:20:02,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:20:02,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:20:02,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:20:02,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:20:02,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:20:02,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:20:02,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:20:02,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:20:02,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:20:02,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:02,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:20:02,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:20:02,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:20:02,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:20:02,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:20:02,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:20:02,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:20:02,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:20:02,215 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_d1a2f351-2951-4ff5-b905-1af68a055a02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d96d66163c8e8d61a2fa90f8dc8359a87f83533e82cd74c25a40ad0f5e1f460 [2021-11-21 00:20:02,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:20:02,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:20:02,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:20:02,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:20:02,568 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:20:02,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i [2021-11-21 00:20:02,639 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/data/fdfb0072e/1e4947093e3a4b00886df6cfc5f762a5/FLAG36df0c569 [2021-11-21 00:20:03,770 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:20:03,771 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i [2021-11-21 00:20:03,832 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/data/fdfb0072e/1e4947093e3a4b00886df6cfc5f762a5/FLAG36df0c569 [2021-11-21 00:20:04,043 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/data/fdfb0072e/1e4947093e3a4b00886df6cfc5f762a5 [2021-11-21 00:20:04,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:20:04,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:20:04,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:04,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:20:04,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:20:04,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:04" (1/1) ... [2021-11-21 00:20:04,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43cd051d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:04, skipping insertion in model container [2021-11-21 00:20:04,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:04" (1/1) ... [2021-11-21 00:20:04,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:20:04,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:20:07,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i[282309,282322] [2021-11-21 00:20:07,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:07,378 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:20:07,846 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_d1a2f351-2951-4ff5-b905-1af68a055a02/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i[282309,282322] [2021-11-21 00:20:07,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:08,087 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:20:08,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08 WrapperNode [2021-11-21 00:20:08,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:08,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:08,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:20:08,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:20:08,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,450 INFO L137 Inliner]: procedures = 347, calls = 1403, calls flagged for inlining = 224, calls inlined = 207, statements flattened = 3854 [2021-11-21 00:20:08,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:08,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:20:08,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:20:08,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:20:08,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:20:08,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:20:08,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:20:08,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:20:08,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:08,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:08,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:20:08,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:20:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_free [2021-11-21 00:20:08,916 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_free [2021-11-21 00:20:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:20:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:20:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:20:08,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:20:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:20:08,918 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:20:08,918 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_unregister [2021-11-21 00:20:08,918 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_unregister [2021-11-21 00:20:08,918 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_read_bd [2021-11-21 00:20:08,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_read_bd [2021-11-21 00:20:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 00:20:08,919 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 00:20:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:20:08,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:20:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-21 00:20:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_mdio_poll [2021-11-21 00:20:08,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_mdio_poll [2021-11-21 00:20:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2021-11-21 00:20:08,920 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2021-11-21 00:20:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-21 00:20:08,921 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-21 00:20:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 00:20:08,921 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 00:20:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_stop [2021-11-21 00:20:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_stop [2021-11-21 00:20:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:20:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_clk_disable_unprepare_15 [2021-11-21 00:20:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_clk_disable_unprepare_15 [2021-11-21 00:20:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_ack_irq [2021-11-21 00:20:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_ack_irq [2021-11-21 00:20:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 00:20:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 00:20:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:20:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 00:20:08,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 00:20:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-21 00:20:08,925 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-21 00:20:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 00:20:08,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 00:20:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_resource [2021-11-21 00:20:08,925 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_resource [2021-11-21 00:20:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:20:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_get_regs_len [2021-11-21 00:20:08,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_get_regs_len [2021-11-21 00:20:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_read [2021-11-21 00:20:08,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_read [2021-11-21 00:20:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-21 00:20:08,928 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-21 00:20:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:20:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_disable_rx_and_tx [2021-11-21 00:20:08,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_disable_rx_and_tx [2021-11-21 00:20:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_do_set_mac_address [2021-11-21 00:20:08,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_do_set_mac_address [2021-11-21 00:20:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_enable_rx_and_tx [2021-11-21 00:20:08,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_enable_rx_and_tx [2021-11-21 00:20:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_init_ring [2021-11-21 00:20:08,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_init_ring [2021-11-21 00:20:08,932 INFO L130 BoogieDeclarations]: Found specification of procedure devm_ioremap_nocache [2021-11-21 00:20:08,933 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_ioremap_nocache [2021-11-21 00:20:08,933 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 00:20:08,933 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 00:20:08,933 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 00:20:08,933 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 00:20:08,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 00:20:08,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 00:20:08,934 INFO L130 BoogieDeclarations]: Found specification of procedure __rounddown_pow_of_two [2021-11-21 00:20:08,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __rounddown_pow_of_two [2021-11-21 00:20:08,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:20:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:20:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 00:20:08,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 00:20:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:20:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-21 00:20:08,936 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-21 00:20:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 00:20:08,937 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 00:20:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 00:20:08,937 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 00:20:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_drivers_clk1__more_at_exit [2021-11-21 00:20:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_drivers_clk1__more_at_exit [2021-11-21 00:20:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_interrupt [2021-11-21 00:20:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_interrupt [2021-11-21 00:20:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-21 00:20:08,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-21 00:20:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 00:20:08,940 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 00:20:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 00:20:08,941 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 00:20:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:20:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:20:08,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:20:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_probe [2021-11-21 00:20:08,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_probe [2021-11-21 00:20:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:20:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure __devm_request_region [2021-11-21 00:20:08,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __devm_request_region [2021-11-21 00:20:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_resume [2021-11-21 00:20:08,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_resume [2021-11-21 00:20:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 00:20:08,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 00:20:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-21 00:20:08,944 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-21 00:20:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 00:20:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 00:20:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-21 00:20:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-21 00:20:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:20:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-21 00:20:08,947 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-21 00:20:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_write_bd [2021-11-21 00:20:08,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_write_bd [2021-11-21 00:20:08,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 00:20:08,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 00:20:08,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:20:08,953 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-21 00:20:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_write [2021-11-21 00:20:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_write [2021-11-21 00:20:08,955 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:20:08,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:20:08,962 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-21 00:20:08,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-21 00:20:08,962 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-21 00:20:08,962 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-21 00:20:08,963 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_enable_irq [2021-11-21 00:20:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_enable_irq [2021-11-21 00:20:08,963 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_open [2021-11-21 00:20:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_open [2021-11-21 00:20:08,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 00:20:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 00:20:08,964 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_disable_irq [2021-11-21 00:20:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_disable_irq [2021-11-21 00:20:08,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-21 00:20:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-21 00:20:08,964 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_remove [2021-11-21 00:20:08,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_remove [2021-11-21 00:20:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-21 00:20:08,965 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-21 00:20:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:20:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure resource_size [2021-11-21 00:20:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure resource_size [2021-11-21 00:20:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 00:20:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 00:20:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure ethoc_tx_timeout [2021-11-21 00:20:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ethoc_tx_timeout [2021-11-21 00:20:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:20:08,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:20:09,776 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:20:09,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:20:10,104 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:20:30,188 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 00:20:30,327 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:20:31,234 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:20:31,234 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 00:20:31,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:31 BoogieIcfgContainer [2021-11-21 00:20:31,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:20:31,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:20:31,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:20:31,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:20:31,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:20:04" (1/3) ... [2021-11-21 00:20:31,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e705383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:31, skipping insertion in model container [2021-11-21 00:20:31,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (2/3) ... [2021-11-21 00:20:31,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e705383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:31, skipping insertion in model container [2021-11-21 00:20:31,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:31" (3/3) ... [2021-11-21 00:20:31,250 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i [2021-11-21 00:20:31,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:20:31,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:20:31,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:20:31,330 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 00:20:31,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:20:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 960 states, 596 states have (on average 1.3288590604026846) internal successors, (792), 610 states have internal predecessors, (792), 299 states have call successors, (299), 65 states have call predecessors, (299), 64 states have return successors, (292), 290 states have call predecessors, (292), 292 states have call successors, (292) [2021-11-21 00:20:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 00:20:31,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:31,421 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:20:31,422 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash 372903008, now seen corresponding path program 1 times [2021-11-21 00:20:31,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:31,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99617603] [2021-11-21 00:20:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:31,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-21 00:20:32,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:32,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99617603] [2021-11-21 00:20:32,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99617603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:32,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:32,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:32,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652451221] [2021-11-21 00:20:32,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:32,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:32,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:32,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:32,508 INFO L87 Difference]: Start difference. First operand has 960 states, 596 states have (on average 1.3288590604026846) internal successors, (792), 610 states have internal predecessors, (792), 299 states have call successors, (299), 65 states have call predecessors, (299), 64 states have return successors, (292), 290 states have call predecessors, (292), 292 states have call successors, (292) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:20:34,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:20:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:37,252 INFO L93 Difference]: Finished difference Result 2775 states and 4009 transitions. [2021-11-21 00:20:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 137 [2021-11-21 00:20:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:37,286 INFO L225 Difference]: With dead ends: 2775 [2021-11-21 00:20:37,286 INFO L226 Difference]: Without dead ends: 1828 [2021-11-21 00:20:37,296 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 00:20:37,300 INFO L933 BasicCegarLoop]: 1395 mSDtfsCounter, 1304 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:37,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1304 Valid, 2489 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-21 00:20:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-11-21 00:20:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1828. [2021-11-21 00:20:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1145 states have (on average 1.325764192139738) internal successors, (1518), 1173 states have internal predecessors, (1518), 557 states have call successors, (557), 126 states have call predecessors, (557), 125 states have return successors, (554), 550 states have call predecessors, (554), 554 states have call successors, (554) [2021-11-21 00:20:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2629 transitions. [2021-11-21 00:20:37,514 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2629 transitions. Word has length 137 [2021-11-21 00:20:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:37,515 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 2629 transitions. [2021-11-21 00:20:37,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:20:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2629 transitions. [2021-11-21 00:20:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-21 00:20:37,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:37,531 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 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] [2021-11-21 00:20:37,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:20:37,531 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash 269102246, now seen corresponding path program 1 times [2021-11-21 00:20:37,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:37,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588317867] [2021-11-21 00:20:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:37,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2021-11-21 00:20:37,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:37,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588317867] [2021-11-21 00:20:37,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588317867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:37,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:37,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:20:37,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567056213] [2021-11-21 00:20:37,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:37,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:20:37,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:20:37,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:20:37,993 INFO L87 Difference]: Start difference. First operand 1828 states and 2629 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:20:40,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:20:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:45,183 INFO L93 Difference]: Finished difference Result 3637 states and 5274 transitions. [2021-11-21 00:20:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:20:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 175 [2021-11-21 00:20:45,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:45,225 INFO L225 Difference]: With dead ends: 3637 [2021-11-21 00:20:45,225 INFO L226 Difference]: Without dead ends: 3633 [2021-11-21 00:20:45,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:20:45,230 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1318 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 5208 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:45,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 5208 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1033 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2021-11-21 00:20:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2021-11-21 00:20:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3629. [2021-11-21 00:20:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 2276 states have (on average 1.327328646748682) internal successors, (3021), 2333 states have internal predecessors, (3021), 1102 states have call successors, (1102), 253 states have call predecessors, (1102), 250 states have return successors, (1144), 1086 states have call predecessors, (1144), 1096 states have call successors, (1144) [2021-11-21 00:20:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 5267 transitions. [2021-11-21 00:20:45,509 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 5267 transitions. Word has length 175 [2021-11-21 00:20:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:45,511 INFO L470 AbstractCegarLoop]: Abstraction has 3629 states and 5267 transitions. [2021-11-21 00:20:45,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:20:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 5267 transitions. [2021-11-21 00:20:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-21 00:20:45,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:45,521 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:45,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:20:45,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:45,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash 646385888, now seen corresponding path program 1 times [2021-11-21 00:20:45,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:45,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363929998] [2021-11-21 00:20:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:45,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2021-11-21 00:20:46,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363929998] [2021-11-21 00:20:46,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363929998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:46,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:46,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:20:46,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486779120] [2021-11-21 00:20:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:46,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:20:46,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:20:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:20:46,003 INFO L87 Difference]: Start difference. First operand 3629 states and 5267 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:20:48,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:20:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:51,804 INFO L93 Difference]: Finished difference Result 3635 states and 5272 transitions. [2021-11-21 00:20:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:20:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 180 [2021-11-21 00:20:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:51,853 INFO L225 Difference]: With dead ends: 3635 [2021-11-21 00:20:51,853 INFO L226 Difference]: Without dead ends: 3610 [2021-11-21 00:20:51,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:20:51,863 INFO L933 BasicCegarLoop]: 1101 mSDtfsCounter, 1312 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:51,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1312 Valid, 3294 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 774 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-21 00:20:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-11-21 00:20:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3610. [2021-11-21 00:20:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 2268 states have (on average 1.3271604938271604) internal successors, (3010), 2323 states have internal predecessors, (3010), 1093 states have call successors, (1093), 250 states have call predecessors, (1093), 248 states have return successors, (1138), 1080 states have call predecessors, (1138), 1090 states have call successors, (1138) [2021-11-21 00:20:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5241 transitions. [2021-11-21 00:20:52,159 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5241 transitions. Word has length 180 [2021-11-21 00:20:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:52,161 INFO L470 AbstractCegarLoop]: Abstraction has 3610 states and 5241 transitions. [2021-11-21 00:20:52,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:20:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5241 transitions. [2021-11-21 00:20:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-21 00:20:52,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:52,195 INFO L514 BasicCegarLoop]: trace histogram [29, 22, 22, 22, 22, 22, 22, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:20:52,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:20:52,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:52,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1373224768, now seen corresponding path program 1 times [2021-11-21 00:20:52,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:52,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76651416] [2021-11-21 00:20:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:52,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2274 trivial. 0 not checked. [2021-11-21 00:20:52,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76651416] [2021-11-21 00:20:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76651416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:52,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:52,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:52,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880115456] [2021-11-21 00:20:52,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:52,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:52,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:52,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:52,722 INFO L87 Difference]: Start difference. First operand 3610 states and 5241 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (60), 3 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-21 00:20:54,770 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 00:20:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:58,028 INFO L93 Difference]: Finished difference Result 10144 states and 14647 transitions. [2021-11-21 00:20:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (60), 3 states have call predecessors, (60), 3 states have call successors, (60) Word has length 451 [2021-11-21 00:20:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:58,105 INFO L225 Difference]: With dead ends: 10144 [2021-11-21 00:20:58,105 INFO L226 Difference]: Without dead ends: 6559 [2021-11-21 00:20:58,131 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 00:20:58,134 INFO L933 BasicCegarLoop]: 1393 mSDtfsCounter, 1027 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:58,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 2433 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 618 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 00:20:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2021-11-21 00:20:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 6543. [2021-11-21 00:20:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6543 states, 4067 states have (on average 1.2999754118514877) internal successors, (5287), 4178 states have internal predecessors, (5287), 1991 states have call successors, (1991), 486 states have call predecessors, (1991), 484 states have return successors, (2038), 1962 states have call predecessors, (2038), 1988 states have call successors, (2038) [2021-11-21 00:20:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6543 states to 6543 states and 9316 transitions. [2021-11-21 00:20:58,715 INFO L78 Accepts]: Start accepts. Automaton has 6543 states and 9316 transitions. Word has length 451 [2021-11-21 00:20:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:58,716 INFO L470 AbstractCegarLoop]: Abstraction has 6543 states and 9316 transitions. [2021-11-21 00:20:58,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (60), 3 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-21 00:20:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6543 states and 9316 transitions. [2021-11-21 00:20:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-11-21 00:20:58,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:58,760 INFO L514 BasicCegarLoop]: trace histogram [30, 22, 22, 22, 22, 22, 22, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:20:58,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:20:58,761 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:58,762 INFO L85 PathProgramCache]: Analyzing trace with hash -249324061, now seen corresponding path program 1 times [2021-11-21 00:20:58,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:58,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762067307] [2021-11-21 00:20:58,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:58,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2375 trivial. 0 not checked. [2021-11-21 00:20:59,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762067307] [2021-11-21 00:20:59,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762067307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:59,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:59,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:59,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741278281] [2021-11-21 00:20:59,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:59,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:59,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:59,188 INFO L87 Difference]: Start difference. First operand 6543 states and 9316 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 3 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2021-11-21 00:21:01,232 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 00:21:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:04,751 INFO L93 Difference]: Finished difference Result 12776 states and 18131 transitions. [2021-11-21 00:21:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:21:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 3 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 454 [2021-11-21 00:21:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:04,815 INFO L225 Difference]: With dead ends: 12776 [2021-11-21 00:21:04,815 INFO L226 Difference]: Without dead ends: 6258 [2021-11-21 00:21:04,853 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 00:21:04,856 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 1223 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2805 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:04,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 2805 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 663 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-21 00:21:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6258 states. [2021-11-21 00:21:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6258 to 6247. [2021-11-21 00:21:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 3947 states have (on average 1.2961743096022296) internal successors, (5116), 4051 states have internal predecessors, (5116), 1813 states have call successors, (1813), 488 states have call predecessors, (1813), 486 states have return successors, (1858), 1783 states have call predecessors, (1858), 1810 states have call successors, (1858) [2021-11-21 00:21:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 8787 transitions. [2021-11-21 00:21:05,288 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 8787 transitions. Word has length 454 [2021-11-21 00:21:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:05,289 INFO L470 AbstractCegarLoop]: Abstraction has 6247 states and 8787 transitions. [2021-11-21 00:21:05,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 3 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2021-11-21 00:21:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 8787 transitions. [2021-11-21 00:21:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-21 00:21:05,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:05,328 INFO L514 BasicCegarLoop]: trace histogram [30, 22, 22, 22, 22, 22, 22, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:21:05,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:21:05,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1653609211, now seen corresponding path program 1 times [2021-11-21 00:21:05,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:05,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860601697] [2021-11-21 00:21:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:05,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2021-11-21 00:21:05,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:05,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860601697] [2021-11-21 00:21:05,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860601697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:05,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:05,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:21:05,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11653363] [2021-11-21 00:21:05,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:05,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:21:05,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:21:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:21:05,729 INFO L87 Difference]: Start difference. First operand 6247 states and 8787 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (64), 3 states have call predecessors, (64), 3 states have call successors, (64) [2021-11-21 00:21:07,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:21:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:11,796 INFO L93 Difference]: Finished difference Result 14652 states and 20655 transitions. [2021-11-21 00:21:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:21:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (64), 3 states have call predecessors, (64), 3 states have call successors, (64) Word has length 459 [2021-11-21 00:21:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:11,883 INFO L225 Difference]: With dead ends: 14652 [2021-11-21 00:21:11,883 INFO L226 Difference]: Without dead ends: 8793 [2021-11-21 00:21:11,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:21:11,919 INFO L933 BasicCegarLoop]: 2078 mSDtfsCounter, 1221 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:11,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 3146 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 781 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 00:21:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8793 states. [2021-11-21 00:21:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8793 to 8782. [2021-11-21 00:21:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8782 states, 5570 states have (on average 1.2971274685816876) internal successors, (7225), 5717 states have internal predecessors, (7225), 2521 states have call successors, (2521), 692 states have call predecessors, (2521), 690 states have return successors, (2589), 2478 states have call predecessors, (2589), 2518 states have call successors, (2589) [2021-11-21 00:21:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8782 states to 8782 states and 12335 transitions. [2021-11-21 00:21:12,443 INFO L78 Accepts]: Start accepts. Automaton has 8782 states and 12335 transitions. Word has length 459 [2021-11-21 00:21:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:12,445 INFO L470 AbstractCegarLoop]: Abstraction has 8782 states and 12335 transitions. [2021-11-21 00:21:12,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (64), 3 states have call predecessors, (64), 3 states have call successors, (64) [2021-11-21 00:21:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8782 states and 12335 transitions. [2021-11-21 00:21:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-11-21 00:21:12,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:12,493 INFO L514 BasicCegarLoop]: trace histogram [32, 22, 22, 22, 22, 22, 22, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:21:12,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:21:12,493 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -191830524, now seen corresponding path program 1 times [2021-11-21 00:21:12,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883585243] [2021-11-21 00:21:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:12,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2599 trivial. 0 not checked. [2021-11-21 00:21:13,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:13,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883585243] [2021-11-21 00:21:13,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883585243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:13,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:13,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:21:13,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397208732] [2021-11-21 00:21:13,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:13,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:21:13,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:21:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:21:13,377 INFO L87 Difference]: Start difference. First operand 8782 states and 12335 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2021-11-21 00:21:15,422 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 00:21:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:19,508 INFO L93 Difference]: Finished difference Result 17208 states and 24404 transitions. [2021-11-21 00:21:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:21:19,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) Word has length 500 [2021-11-21 00:21:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:19,580 INFO L225 Difference]: With dead ends: 17208 [2021-11-21 00:21:19,580 INFO L226 Difference]: Without dead ends: 8814 [2021-11-21 00:21:19,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:21:19,628 INFO L933 BasicCegarLoop]: 1095 mSDtfsCounter, 9 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:19,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3261 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 785 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 00:21:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8814 states. [2021-11-21 00:21:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8814 to 8806. [2021-11-21 00:21:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8806 states, 5590 states have (on average 1.2960644007155635) internal successors, (7245), 5741 states have internal predecessors, (7245), 2521 states have call successors, (2521), 692 states have call predecessors, (2521), 694 states have return successors, (2594), 2478 states have call predecessors, (2594), 2518 states have call successors, (2594) [2021-11-21 00:21:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8806 states to 8806 states and 12360 transitions. [2021-11-21 00:21:20,134 INFO L78 Accepts]: Start accepts. Automaton has 8806 states and 12360 transitions. Word has length 500 [2021-11-21 00:21:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:20,135 INFO L470 AbstractCegarLoop]: Abstraction has 8806 states and 12360 transitions. [2021-11-21 00:21:20,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2021-11-21 00:21:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8806 states and 12360 transitions. [2021-11-21 00:21:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-21 00:21:20,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:20,179 INFO L514 BasicCegarLoop]: trace histogram [32, 22, 22, 22, 22, 22, 22, 13, 13, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:21:20,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:21:20,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2038849068, now seen corresponding path program 1 times [2021-11-21 00:21:20,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:20,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343373891] [2021-11-21 00:21:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:20,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2693 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 2635 trivial. 0 not checked. [2021-11-21 00:21:21,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:21,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343373891] [2021-11-21 00:21:21,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343373891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:21:21,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292076387] [2021-11-21 00:21:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:21,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:21:21,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:21:21,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2f351-2951-4ff5-b905-1af68a055a02/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:21:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 3863 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 00:21:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2693 backedges. 1346 proven. 23 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2021-11-21 00:21:26,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2693 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 2633 trivial. 0 not checked. [2021-11-21 00:21:28,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292076387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86132422] [2021-11-21 00:21:28,694 INFO L159 IcfgInterpreter]: Started Sifa with 234 locations of interest [2021-11-21 00:21:28,695 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:21:28,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:21:28,710 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:21:28,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:21:33,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 732 treesize of output 686 [2021-11-21 00:22:03,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1352 treesize of output 1151 [2021-11-21 00:22:27,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1352 treesize of output 1151