./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:01:04,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:01:04,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:01:04,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:01:04,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:01:04,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:01:04,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:01:04,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:01:04,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:01:04,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:01:04,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:01:04,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:01:04,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:01:04,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:01:04,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:01:04,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:01:04,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:01:04,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:01:04,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:01:04,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:01:04,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:01:04,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:01:04,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:01:04,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:01:04,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:01:04,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:01:04,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:01:04,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:01:04,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:01:04,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:01:04,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:01:04,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:01:04,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:01:04,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:01:04,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:01:04,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:01:04,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:01:04,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:01:04,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:01:04,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:01:04,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:01:04,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:01:04,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:01:04,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:01:04,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:01:04,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:01:04,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:01:04,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:01:04,784 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:01:04,785 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:01:04,785 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:01:04,785 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:01:04,786 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:01:04,786 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:01:04,786 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:01:04,786 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:01:04,787 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:01:04,787 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:01:04,787 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:01:04,788 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:01:04,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:01:04,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:01:04,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:01:04,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:01:04,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:01:04,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:01:04,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:01:04,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:01:04,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:01:04,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:01:04,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:01:04,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:01:04,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:01:04,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:01:04,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:01:04,793 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:01:04,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:01:04,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:01:04,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:01:04,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:01:04,794 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_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-23 02:01:05,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:01:05,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:01:05,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:01:05,116 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:01:05,117 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:01:05,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-23 02:01:05,182 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/data/da7d38ff6/626effa5d05b42b1af27bebfecf5b25a/FLAGabe1b60c1 [2021-11-23 02:01:06,107 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:01:06,108 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-23 02:01:06,161 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/data/da7d38ff6/626effa5d05b42b1af27bebfecf5b25a/FLAGabe1b60c1 [2021-11-23 02:01:06,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/data/da7d38ff6/626effa5d05b42b1af27bebfecf5b25a [2021-11-23 02:01:06,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:01:06,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:01:06,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:01:06,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:01:06,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:01:06,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:01:06" (1/1) ... [2021-11-23 02:01:06,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161a833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:06, skipping insertion in model container [2021-11-23 02:01:06,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:01:06" (1/1) ... [2021-11-23 02:01:06,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:01:06,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:01:08,476 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_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-23 02:01:08,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:01:08,589 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:01:08,939 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_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-23 02:01:08,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:01:09,218 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:01:09,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09 WrapperNode [2021-11-23 02:01:09,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:01:09,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:01:09,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:01:09,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:01:09,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,548 INFO L137 Inliner]: procedures = 200, calls = 1489, calls flagged for inlining = 98, calls inlined = 84, statements flattened = 3293 [2021-11-23 02:01:09,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:01:09,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:01:09,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:01:09,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:01:09,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:01:09,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:01:09,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:01:09,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:01:09,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (1/1) ... [2021-11-23 02:01:09,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:01:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:09,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:01:09,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:01:09,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:01:09,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:01:09,901 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:01:09,901 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:01:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:01:09,902 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:01:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:01:09,902 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:01:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:01:09,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:01:09,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-23 02:01:09,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-23 02:01:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:01:09,948 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:01:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-23 02:01:09,948 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-23 02:01:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-23 02:01:09,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-23 02:01:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-23 02:01:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-23 02:01:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2021-11-23 02:01:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2021-11-23 02:01:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:01:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:01:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 02:01:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 02:01:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:01:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:01:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:01:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:01:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-23 02:01:09,950 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-23 02:01:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2021-11-23 02:01:09,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2021-11-23 02:01:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:01:09,950 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:01:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-23 02:01:09,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-23 02:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:01:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:01:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:01:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-23 02:01:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-23 02:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 02:01:09,952 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 02:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_type_trans [2021-11-23 02:01:09,952 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_type_trans [2021-11-23 02:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:01:09,952 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-23 02:01:09,952 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-23 02:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure farsync_type_trans [2021-11-23 02:01:09,952 INFO L138 BoogieDeclarations]: Found implementation of procedure farsync_type_trans [2021-11-23 02:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 02:01:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 02:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:01:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:01:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:01:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:01:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:01:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-23 02:01:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-23 02:01:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:01:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:01:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure fst_issue_cmd [2021-11-23 02:01:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_issue_cmd [2021-11-23 02:01:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:01:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:01:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:01:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure fst_disable_intr [2021-11-23 02:01:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_disable_intr [2021-11-23 02:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:01:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 02:01:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 02:01:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:01:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure fst_cpureset [2021-11-23 02:01:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_cpureset [2021-11-23 02:01:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:01:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-23 02:01:09,961 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-23 02:01:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure fst_process_rx_status [2021-11-23 02:01:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_process_rx_status [2021-11-23 02:01:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure fst_q_work_item [2021-11-23 02:01:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_q_work_item [2021-11-23 02:01:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:01:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:01:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-23 02:01:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-23 02:01:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-23 02:01:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-23 02:01:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-23 02:01:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-23 02:01:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-23 02:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-23 02:01:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:01:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:01:09,966 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:01:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-23 02:01:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-23 02:01:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure fst_clear_intr [2021-11-23 02:01:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_clear_intr [2021-11-23 02:01:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:01:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-23 02:01:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-23 02:01:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-23 02:01:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-23 02:01:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-23 02:01:09,978 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-23 02:01:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-23 02:01:09,978 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-23 02:01:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:01:09,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:01:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 02:01:09,979 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 02:01:10,648 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:01:10,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:01:11,516 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:01:11,530 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:01:11,541 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:01:11,542 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:01:11,545 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:01:11,546 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:01:11,556 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:01:14,376 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume false; [2021-11-23 02:01:14,376 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##259: assume !false; [2021-11-23 02:01:14,376 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##265: assume !false; [2021-11-23 02:01:14,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##264: assume false; [2021-11-23 02:01:14,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##214: assume !false; [2021-11-23 02:01:14,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##213: assume false; [2021-11-23 02:01:14,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##228: assume !false; [2021-11-23 02:01:14,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##227: assume false; [2021-11-23 02:01:14,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##92: assume !false;call ULTIMATE.dealloc(fst_ioctl_~#wrthdr~0#1.base, fst_ioctl_~#wrthdr~0#1.offset);havoc fst_ioctl_~#wrthdr~0#1.base, fst_ioctl_~#wrthdr~0#1.offset;call ULTIMATE.dealloc(fst_ioctl_~#info~0#1.base, fst_ioctl_~#info~0#1.offset);havoc fst_ioctl_~#info~0#1.base, fst_ioctl_~#info~0#1.offset; [2021-11-23 02:01:14,378 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume false; [2021-11-23 02:01:14,378 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2021-11-23 02:01:14,378 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2021-11-23 02:01:14,378 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##391: assume !false; [2021-11-23 02:01:14,378 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##390: assume false; [2021-11-23 02:01:14,468 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:01:15,209 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:01:15,210 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:01:15,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:01:15 BoogieIcfgContainer [2021-11-23 02:01:15,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:01:15,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:01:15,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:01:15,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:01:15,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:01:06" (1/3) ... [2021-11-23 02:01:15,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a17674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:01:15, skipping insertion in model container [2021-11-23 02:01:15,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:09" (2/3) ... [2021-11-23 02:01:15,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a17674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:01:15, skipping insertion in model container [2021-11-23 02:01:15,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:01:15" (3/3) ... [2021-11-23 02:01:15,229 INFO L111 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-23 02:01:15,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:01:15,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:01:15,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:01:15,382 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:01:15,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:01:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 821 states, 503 states have (on average 1.3041749502982107) internal successors, (656), 511 states have internal predecessors, (656), 260 states have call successors, (260), 56 states have call predecessors, (260), 56 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) [2021-11-23 02:01:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:01:15,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:15,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:15,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:15,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1634586507, now seen corresponding path program 1 times [2021-11-23 02:01:15,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:15,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648337157] [2021-11-23 02:01:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:15,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:01:15,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648337157] [2021-11-23 02:01:15,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648337157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:15,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:15,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:01:15,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048142491] [2021-11-23 02:01:15,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:15,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:01:15,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:01:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:15,988 INFO L87 Difference]: Start difference. First operand has 821 states, 503 states have (on average 1.3041749502982107) internal successors, (656), 511 states have internal predecessors, (656), 260 states have call successors, (260), 56 states have call predecessors, (260), 56 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:01:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:17,815 INFO L93 Difference]: Finished difference Result 1640 states and 2353 transitions. [2021-11-23 02:01:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:01:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-23 02:01:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:17,841 INFO L225 Difference]: With dead ends: 1640 [2021-11-23 02:01:17,841 INFO L226 Difference]: Without dead ends: 819 [2021-11-23 02:01:17,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:17,859 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 0 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:17,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2081 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:01:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-11-23 02:01:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 819. [2021-11-23 02:01:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 503 states have (on average 1.3001988071570576) internal successors, (654), 509 states have internal predecessors, (654), 260 states have call successors, (260), 56 states have call predecessors, (260), 55 states have return successors, (258), 258 states have call predecessors, (258), 258 states have call successors, (258) [2021-11-23 02:01:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1172 transitions. [2021-11-23 02:01:18,024 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1172 transitions. Word has length 15 [2021-11-23 02:01:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:18,025 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1172 transitions. [2021-11-23 02:01:18,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:01:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1172 transitions. [2021-11-23 02:01:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:01:18,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:18,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:18,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:01:18,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1239223528, now seen corresponding path program 1 times [2021-11-23 02:01:18,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:18,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031489706] [2021-11-23 02:01:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:18,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:01:18,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031489706] [2021-11-23 02:01:18,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031489706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:01:18,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959789785] [2021-11-23 02:01:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:18,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:18,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:18,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:18,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:01:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:01:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:01:18,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:01:18,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959789785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:18,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:01:18,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 02:01:18,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508279679] [2021-11-23 02:01:18,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:18,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:01:18,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:01:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:01:18,869 INFO L87 Difference]: Start difference. First operand 819 states and 1172 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:01:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:20,636 INFO L93 Difference]: Finished difference Result 2373 states and 3389 transitions. [2021-11-23 02:01:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:01:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-23 02:01:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:20,653 INFO L225 Difference]: With dead ends: 2373 [2021-11-23 02:01:20,653 INFO L226 Difference]: Without dead ends: 1559 [2021-11-23 02:01:20,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:01:20,659 INFO L933 BasicCegarLoop]: 1377 mSDtfsCounter, 1051 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:20,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 2405 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:01:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-11-23 02:01:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1555. [2021-11-23 02:01:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 954 states have (on average 1.29874213836478) internal successors, (1239), 965 states have internal predecessors, (1239), 490 states have call successors, (490), 111 states have call predecessors, (490), 110 states have return successors, (488), 487 states have call predecessors, (488), 488 states have call successors, (488) [2021-11-23 02:01:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2217 transitions. [2021-11-23 02:01:20,774 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2217 transitions. Word has length 16 [2021-11-23 02:01:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:20,775 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 2217 transitions. [2021-11-23 02:01:20,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:01:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2217 transitions. [2021-11-23 02:01:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:01:20,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:20,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:20,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:21,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:21,004 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1150068244, now seen corresponding path program 1 times [2021-11-23 02:01:21,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950509435] [2021-11-23 02:01:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:21,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:01:21,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:21,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950509435] [2021-11-23 02:01:21,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950509435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:01:21,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163702644] [2021-11-23 02:01:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:21,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:21,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:21,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:01:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:01:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:01:21,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:01:22,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163702644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:22,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769906189] [2021-11-23 02:01:22,043 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-23 02:01:22,044 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:22,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:22,059 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:22,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:24,097 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 40 treesize of output 41 [2021-11-23 02:01:24,262 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 40 treesize of output 41 [2021-11-23 02:01:24,356 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 50 treesize of output 47 [2021-11-23 02:01:24,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:27,617 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:01:27,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:01:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:28,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1541 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 446 [2021-11-23 02:01:29,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:01:29,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:01:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:30,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 614 [2021-11-23 02:01:30,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 728 treesize of output 716 [2021-11-23 02:01:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6553 treesize of output 6216 [2021-11-23 02:01:37,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6546 treesize of output 6209 [2021-11-23 02:01:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:38,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 6539 treesize of output 6258 [2021-11-23 02:01:39,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6536 treesize of output 6514 [2021-11-23 02:01:48,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:01:48,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:01:48,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:01:49,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:01:50,983 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 100 for LOIs [2021-11-23 02:01:51,033 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 97 for LOIs [2021-11-23 02:01:51,049 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 133 for LOIs [2021-11-23 02:01:51,179 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 106 for LOIs [2021-11-23 02:01:51,196 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:02,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [769906189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:02,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 3, 4] total 30 [2021-11-23 02:02:02,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097372728] [2021-11-23 02:02:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:02,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:02:02,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:02:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:02:02,773 INFO L87 Difference]: Start difference. First operand 1555 states and 2217 transitions. Second operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 18 states have internal predecessors, (22), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:02:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:11,493 INFO L93 Difference]: Finished difference Result 1578 states and 2246 transitions. [2021-11-23 02:02:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:02:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.1) internal successors, (22), 18 states have internal predecessors, (22), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-23 02:02:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:11,510 INFO L225 Difference]: With dead ends: 1578 [2021-11-23 02:02:11,511 INFO L226 Difference]: Without dead ends: 1575 [2021-11-23 02:02:11,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:02:11,519 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 7 mSDsluCounter, 14688 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14475 SdHoareTripleChecker+Invalid, 3355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2179 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:11,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 14475 Invalid, 3355 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 1175 Invalid, 0 Unknown, 2179 Unchecked, 8.3s Time] [2021-11-23 02:02:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-23 02:02:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1575. [2021-11-23 02:02:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 969 states have (on average 1.301341589267286) internal successors, (1261), 980 states have internal predecessors, (1261), 492 states have call successors, (492), 115 states have call predecessors, (492), 113 states have return successors, (490), 488 states have call predecessors, (490), 490 states have call successors, (490) [2021-11-23 02:02:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2243 transitions. [2021-11-23 02:02:11,639 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2243 transitions. Word has length 30 [2021-11-23 02:02:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:11,640 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 2243 transitions. [2021-11-23 02:02:11,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.1) internal successors, (22), 18 states have internal predecessors, (22), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:02:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2243 transitions. [2021-11-23 02:02:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:02:11,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:11,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:11,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:11,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:11,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1157582882, now seen corresponding path program 1 times [2021-11-23 02:02:11,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:11,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727217110] [2021-11-23 02:02:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:11,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:11,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:11,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727217110] [2021-11-23 02:02:11,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727217110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364990704] [2021-11-23 02:02:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:11,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:11,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:11,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:12,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:02:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:02:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:02:12,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:02:12,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364990704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:12,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:02:12,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:02:12,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507620847] [2021-11-23 02:02:12,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:12,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:12,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:12,498 INFO L87 Difference]: Start difference. First operand 1575 states and 2243 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:02:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:13,432 INFO L93 Difference]: Finished difference Result 3590 states and 5203 transitions. [2021-11-23 02:02:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-23 02:02:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:13,450 INFO L225 Difference]: With dead ends: 3590 [2021-11-23 02:02:13,450 INFO L226 Difference]: Without dead ends: 2043 [2021-11-23 02:02:13,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:13,461 INFO L933 BasicCegarLoop]: 1217 mSDtfsCounter, 492 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:13,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 2171 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:02:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-11-23 02:02:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 2039. [2021-11-23 02:02:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 1269 states have (on average 1.3144208037825058) internal successors, (1668), 1278 states have internal predecessors, (1668), 660 states have call successors, (660), 111 states have call predecessors, (660), 109 states have return successors, (658), 656 states have call predecessors, (658), 658 states have call successors, (658) [2021-11-23 02:02:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 2986 transitions. [2021-11-23 02:02:13,598 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 2986 transitions. Word has length 31 [2021-11-23 02:02:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:13,598 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 2986 transitions. [2021-11-23 02:02:13,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:02:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 2986 transitions. [2021-11-23 02:02:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:02:13,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:13,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:13,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:13,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:13,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1239234258, now seen corresponding path program 1 times [2021-11-23 02:02:13,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664398901] [2021-11-23 02:02:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:13,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:13,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:13,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664398901] [2021-11-23 02:02:13,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664398901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:13,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556863709] [2021-11-23 02:02:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:13,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:13,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:13,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:13,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:02:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:02:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:14,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:14,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556863709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:14,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630856354] [2021-11-23 02:02:14,599 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-23 02:02:14,599 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:14,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:14,600 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:14,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:16,703 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:02:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:02:17,110 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 40 treesize of output 41 [2021-11-23 02:02:17,180 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 40 treesize of output 41 [2021-11-23 02:02:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:17,441 INFO L244 Elim1Store]: Index analysis took 104 ms [2021-11-23 02:02:19,596 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:02:19,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:02:19,910 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 50 treesize of output 47 [2021-11-23 02:02:19,948 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:02:19,974 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:02:20,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:02:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:02:20,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:02:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:20,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:02:20,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:20,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:02:20,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:02:20,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:02:20,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:02:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:02:20,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:02:23,460 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 137 for LOIs [2021-11-23 02:02:23,523 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 151 for LOIs [2021-11-23 02:02:23,574 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:02:23,594 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:02:23,615 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:43,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [630856354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:43,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:43,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [4, 3, 4] total 31 [2021-11-23 02:02:43,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485472440] [2021-11-23 02:02:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:43,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:02:43,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:02:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:02:43,537 INFO L87 Difference]: Start difference. First operand 2039 states and 2986 transitions. Second operand has 26 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:02:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:52,260 INFO L93 Difference]: Finished difference Result 3362 states and 4956 transitions. [2021-11-23 02:02:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:02:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-11-23 02:02:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:52,275 INFO L225 Difference]: With dead ends: 3362 [2021-11-23 02:02:52,276 INFO L226 Difference]: Without dead ends: 2039 [2021-11-23 02:02:52,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:02:52,282 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 8 mSDsluCounter, 13690 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13692 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:52,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 13692 Invalid, 1798 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1210 Invalid, 0 Unknown, 586 Unchecked, 8.5s Time] [2021-11-23 02:02:52,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-11-23 02:02:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2039. [2021-11-23 02:02:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 1269 states have (on average 1.313632781717888) internal successors, (1667), 1278 states have internal predecessors, (1667), 660 states have call successors, (660), 111 states have call predecessors, (660), 109 states have return successors, (658), 656 states have call predecessors, (658), 658 states have call successors, (658) [2021-11-23 02:02:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 2985 transitions. [2021-11-23 02:02:52,407 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 2985 transitions. Word has length 32 [2021-11-23 02:02:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:52,407 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 2985 transitions. [2021-11-23 02:02:52,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:02:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 2985 transitions. [2021-11-23 02:02:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:02:52,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:52,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:52,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:52,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:52,624 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash -432849447, now seen corresponding path program 1 times [2021-11-23 02:02:52,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:52,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758640802] [2021-11-23 02:02:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:52,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:52,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758640802] [2021-11-23 02:02:52,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758640802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554242412] [2021-11-23 02:02:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:52,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:52,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:52,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:02:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:02:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:02:53,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:02:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554242412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:53,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:02:53,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:02:53,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124706195] [2021-11-23 02:02:53,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:53,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:53,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:53,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:53,205 INFO L87 Difference]: Start difference. First operand 2039 states and 2985 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:02:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:53,716 INFO L93 Difference]: Finished difference Result 4050 states and 5935 transitions. [2021-11-23 02:02:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-11-23 02:02:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:53,732 INFO L225 Difference]: With dead ends: 4050 [2021-11-23 02:02:53,732 INFO L226 Difference]: Without dead ends: 2037 [2021-11-23 02:02:53,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:53,741 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 509 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:53,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1407 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:02:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-11-23 02:02:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 2037. [2021-11-23 02:02:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 1267 states have (on average 1.3093922651933703) internal successors, (1659), 1276 states have internal predecessors, (1659), 660 states have call successors, (660), 111 states have call predecessors, (660), 109 states have return successors, (658), 656 states have call predecessors, (658), 658 states have call successors, (658) [2021-11-23 02:02:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 2977 transitions. [2021-11-23 02:02:53,868 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 2977 transitions. Word has length 32 [2021-11-23 02:02:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:53,868 INFO L470 AbstractCegarLoop]: Abstraction has 2037 states and 2977 transitions. [2021-11-23 02:02:53,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:02:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 2977 transitions. [2021-11-23 02:02:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:02:53,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:53,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:53,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:54,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:02:54,096 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:54,097 INFO L85 PathProgramCache]: Analyzing trace with hash 761489431, now seen corresponding path program 1 times [2021-11-23 02:02:54,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:54,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714398597] [2021-11-23 02:02:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:54,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:54,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714398597] [2021-11-23 02:02:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714398597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157134128] [2021-11-23 02:02:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:54,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:54,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:54,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:54,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:02:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:02:54,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:54,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:54,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157134128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:54,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2080270579] [2021-11-23 02:02:54,766 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-23 02:02:54,766 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:54,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:54,767 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:54,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:57,151 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:02:57,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:02:57,466 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 40 treesize of output 41 [2021-11-23 02:02:57,536 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 40 treesize of output 41 [2021-11-23 02:02:57,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:00,170 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:03:00,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:03:00,379 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 50 treesize of output 47 [2021-11-23 02:03:00,430 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:03:00,465 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:03:00,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:03:00,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:03:00,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:03:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:00,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:03:00,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:00,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:03:00,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:03:00,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:03:00,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:03:00,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:03:01,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:03:04,333 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 137 for LOIs [2021-11-23 02:03:04,386 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:03:04,406 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 170 for LOIs [2021-11-23 02:03:04,585 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:03:04,606 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:03:28,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2080270579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:28,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:03:28,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [4, 3, 4] total 32 [2021-11-23 02:03:28,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857949174] [2021-11-23 02:03:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:28,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 02:03:28,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 02:03:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:03:28,363 INFO L87 Difference]: Start difference. First operand 2037 states and 2977 transitions. Second operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:03:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:33,715 INFO L93 Difference]: Finished difference Result 2058 states and 3005 transitions. [2021-11-23 02:03:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 02:03:33,717 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-23 02:03:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:33,733 INFO L225 Difference]: With dead ends: 2058 [2021-11-23 02:03:33,733 INFO L226 Difference]: Without dead ends: 2055 [2021-11-23 02:03:33,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:03:33,736 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 7 mSDsluCounter, 10394 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10549 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1482 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:33,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10549 Invalid, 2358 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 875 Invalid, 0 Unknown, 1482 Unchecked, 5.2s Time] [2021-11-23 02:03:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-11-23 02:03:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2049. [2021-11-23 02:03:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1277 states have (on average 1.3093187157400157) internal successors, (1672), 1286 states have internal predecessors, (1672), 661 states have call successors, (661), 112 states have call predecessors, (661), 110 states have return successors, (659), 657 states have call predecessors, (659), 659 states have call successors, (659) [2021-11-23 02:03:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 2992 transitions. [2021-11-23 02:03:33,875 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 2992 transitions. Word has length 36 [2021-11-23 02:03:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:33,876 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 2992 transitions. [2021-11-23 02:03:33,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:03:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 2992 transitions. [2021-11-23 02:03:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:03:33,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:33,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:33,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:34,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:03:34,108 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1001318799, now seen corresponding path program 1 times [2021-11-23 02:03:34,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:34,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354577736] [2021-11-23 02:03:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:34,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:03:34,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354577736] [2021-11-23 02:03:34,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354577736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:03:34,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595289929] [2021-11-23 02:03:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:34,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:03:34,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:34,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:03:34,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:03:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:03:34,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:03:34,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:03:34,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595289929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825308857] [2021-11-23 02:03:34,781 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-23 02:03:34,781 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:03:34,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:03:34,782 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:03:34,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:03:35,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:38,361 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:03:38,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:03:38,639 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 40 treesize of output 41 [2021-11-23 02:03:38,704 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 50 treesize of output 47 [2021-11-23 02:03:38,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:38,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1541 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 446 [2021-11-23 02:03:39,089 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 40 treesize of output 41 [2021-11-23 02:03:40,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:03:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 614 [2021-11-23 02:03:40,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 728 treesize of output 716 [2021-11-23 02:03:40,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:03:45,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:45,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6553 treesize of output 6216 [2021-11-23 02:03:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6546 treesize of output 6209 [2021-11-23 02:03:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:46,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 6539 treesize of output 6258 [2021-11-23 02:03:47,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6536 treesize of output 6514 [2021-11-23 02:03:56,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:03:56,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:03:56,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:03:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:03:59,820 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 100 for LOIs [2021-11-23 02:03:59,863 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 114 for LOIs [2021-11-23 02:03:59,899 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 97 for LOIs [2021-11-23 02:03:59,911 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 106 for LOIs [2021-11-23 02:03:59,930 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:04:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [825308857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:17,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:04:17,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [4, 3, 4] total 33 [2021-11-23 02:04:17,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005168952] [2021-11-23 02:04:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:17,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 02:04:17,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 02:04:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:04:17,840 INFO L87 Difference]: Start difference. First operand 2049 states and 2992 transitions. Second operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:04:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:23,501 INFO L93 Difference]: Finished difference Result 3372 states and 4959 transitions. [2021-11-23 02:04:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:04:23,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-11-23 02:04:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:23,517 INFO L225 Difference]: With dead ends: 3372 [2021-11-23 02:04:23,518 INFO L226 Difference]: Without dead ends: 2049 [2021-11-23 02:04:23,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:04:23,525 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 7 mSDsluCounter, 12856 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12596 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1517 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:23,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12596 Invalid, 2430 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 910 Invalid, 0 Unknown, 1517 Unchecked, 5.4s Time] [2021-11-23 02:04:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-11-23 02:04:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2039. [2021-11-23 02:04:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 1269 states have (on average 1.309692671394799) internal successors, (1662), 1278 states have internal predecessors, (1662), 660 states have call successors, (660), 111 states have call predecessors, (660), 109 states have return successors, (658), 656 states have call predecessors, (658), 658 states have call successors, (658) [2021-11-23 02:04:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 2980 transitions. [2021-11-23 02:04:23,659 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 2980 transitions. Word has length 38 [2021-11-23 02:04:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:23,659 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 2980 transitions. [2021-11-23 02:04:23,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:04:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 2980 transitions. [2021-11-23 02:04:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:04:23,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:23,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:23,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:23,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:23,880 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1020892178, now seen corresponding path program 1 times [2021-11-23 02:04:23,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:23,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013019113] [2021-11-23 02:04:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:23,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:23,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:23,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013019113] [2021-11-23 02:04:23,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013019113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:23,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886296335] [2021-11-23 02:04:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:23,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:23,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:23,954 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:23,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:04:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:24,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:04:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:24,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:24,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886296335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006689790] [2021-11-23 02:04:24,462 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2021-11-23 02:04:24,462 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:04:24,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:04:24,463 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:04:24,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:04:24,997 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 50 treesize of output 47 [2021-11-23 02:04:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:26,608 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:04:26,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:04:26,883 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 40 treesize of output 41 [2021-11-23 02:04:27,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:29,173 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:04:29,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:04:29,383 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 40 treesize of output 41 [2021-11-23 02:04:29,481 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:04:29,492 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:04:29,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:04:29,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:04:29,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:04:29,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:04:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:29,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:04:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:29,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:04:29,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:04:29,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:04:29,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:04:30,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:04:32,475 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 137 for LOIs [2021-11-23 02:04:32,529 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:04:32,549 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 170 for LOIs [2021-11-23 02:04:32,652 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:04:32,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:04:52,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1006689790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:52,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:04:52,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 3, 4] total 30 [2021-11-23 02:04:52,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860232187] [2021-11-23 02:04:52,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:52,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:04:52,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:04:52,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:04:52,700 INFO L87 Difference]: Start difference. First operand 2039 states and 2980 transitions. Second operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:04:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:57,732 INFO L93 Difference]: Finished difference Result 3369 states and 4959 transitions. [2021-11-23 02:04:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:04:57,733 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.45) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2021-11-23 02:04:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:57,752 INFO L225 Difference]: With dead ends: 3369 [2021-11-23 02:04:57,752 INFO L226 Difference]: Without dead ends: 2054 [2021-11-23 02:04:57,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:04:57,762 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 5 mSDsluCounter, 10936 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11229 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1541 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:57,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 11229 Invalid, 2274 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 732 Invalid, 0 Unknown, 1541 Unchecked, 4.8s Time] [2021-11-23 02:04:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-11-23 02:04:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 2054. [2021-11-23 02:04:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 1281 states have (on average 1.3091334894613582) internal successors, (1677), 1290 states have internal predecessors, (1677), 662 states have call successors, (662), 113 states have call predecessors, (662), 110 states have return successors, (660), 657 states have call predecessors, (660), 660 states have call successors, (660) [2021-11-23 02:04:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2999 transitions. [2021-11-23 02:04:57,950 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2999 transitions. Word has length 40 [2021-11-23 02:04:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:57,953 INFO L470 AbstractCegarLoop]: Abstraction has 2054 states and 2999 transitions. [2021-11-23 02:04:57,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.45) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:04:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2999 transitions. [2021-11-23 02:04:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 02:04:57,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:57,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:57,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:58,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:58,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash -465151697, now seen corresponding path program 1 times [2021-11-23 02:04:58,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:58,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129864620] [2021-11-23 02:04:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:58,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:04:58,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:58,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129864620] [2021-11-23 02:04:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129864620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:58,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144089018] [2021-11-23 02:04:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:58,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:58,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:58,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:04:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:04:58,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:04:58,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:04:58,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144089018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:58,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108321923] [2021-11-23 02:04:58,957 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-23 02:04:58,957 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:04:58,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:04:58,958 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:04:58,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:04:59,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:01,904 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:05:01,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:05:02,132 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 40 treesize of output 41 [2021-11-23 02:05:02,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:02,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1541 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 446 [2021-11-23 02:05:02,394 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 50 treesize of output 47 [2021-11-23 02:05:02,629 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 40 treesize of output 41 [2021-11-23 02:05:03,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:05:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:03,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 614 [2021-11-23 02:05:03,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 728 treesize of output 716 [2021-11-23 02:05:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:05:08,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:08,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6553 treesize of output 6216 [2021-11-23 02:05:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6546 treesize of output 6209 [2021-11-23 02:05:10,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:10,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 6539 treesize of output 6258 [2021-11-23 02:05:10,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6536 treesize of output 6514 [2021-11-23 02:05:18,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:05:18,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:05:18,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:05:19,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:05:22,030 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 100 for LOIs [2021-11-23 02:05:22,059 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 97 for LOIs [2021-11-23 02:05:22,068 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 133 for LOIs [2021-11-23 02:05:22,147 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 106 for LOIs [2021-11-23 02:05:22,157 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:05:40,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2108321923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:40,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:05:40,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 3, 4] total 35 [2021-11-23 02:05:40,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130237453] [2021-11-23 02:05:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:40,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 02:05:40,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 02:05:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:05:40,779 INFO L87 Difference]: Start difference. First operand 2054 states and 2999 transitions. Second operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:05:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:44,401 INFO L93 Difference]: Finished difference Result 2080 states and 3037 transitions. [2021-11-23 02:05:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:05:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-23 02:05:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:44,416 INFO L225 Difference]: With dead ends: 2080 [2021-11-23 02:05:44,417 INFO L226 Difference]: Without dead ends: 2077 [2021-11-23 02:05:44,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:05:44,420 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 4 mSDsluCounter, 12736 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13030 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1750 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:44,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 13030 Invalid, 2320 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 568 Invalid, 0 Unknown, 1750 Unchecked, 3.4s Time] [2021-11-23 02:05:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-11-23 02:05:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2070. [2021-11-23 02:05:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1295 states have (on average 1.311969111969112) internal successors, (1699), 1304 states have internal predecessors, (1699), 663 states have call successors, (663), 114 states have call predecessors, (663), 111 states have return successors, (661), 658 states have call predecessors, (661), 661 states have call successors, (661) [2021-11-23 02:05:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3023 transitions. [2021-11-23 02:05:44,577 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3023 transitions. Word has length 39 [2021-11-23 02:05:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:44,578 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3023 transitions. [2021-11-23 02:05:44,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:05:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3023 transitions. [2021-11-23 02:05:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:05:44,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:44,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:44,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:44,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:05:44,788 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash 483602202, now seen corresponding path program 1 times [2021-11-23 02:05:44,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:44,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679871756] [2021-11-23 02:05:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:44,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:44,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:44,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679871756] [2021-11-23 02:05:44,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679871756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279579682] [2021-11-23 02:05:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:44,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:44,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:44,888 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:44,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:05:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:05:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:45,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:45,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279579682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:45,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506910797] [2021-11-23 02:05:45,582 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-23 02:05:45,582 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:45,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:45,583 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:45,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:05:46,188 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 50 treesize of output 47 [2021-11-23 02:05:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:47,970 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:05:47,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:05:48,295 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 40 treesize of output 41 [2021-11-23 02:05:48,419 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 40 treesize of output 41 [2021-11-23 02:05:48,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:51,186 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:05:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:05:51,402 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:05:51,412 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:05:51,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:05:51,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:05:51,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:05:51,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:05:51,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:51,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:05:51,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:51,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:05:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:05:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:05:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:05:52,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:05:55,205 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 137 for LOIs [2021-11-23 02:05:55,282 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_blast_assert with input of size 131 for LOIs [2021-11-23 02:05:55,307 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 135 for LOIs [2021-11-23 02:05:55,331 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:05:55,358 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 170 for LOIs [2021-11-23 02:05:55,626 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:05:55,648 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:23,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71786#(and (<= 46 |~#fst_pci_dev_id~0.base|) (<= |~#fst_card_array~0.offset| 0) (<= |~#fst_tx_task~0.offset| 0) (<= |~#fst_work_intq~0.offset| 0) (<= 45 |~#fst_excluded_list~0.base|) (<= 0 |#NULL.base|) (<= 0 |~#fst_pci_dev_id~0.offset|) (<= ~LDV_IN_INTERRUPT~0 1) (<= |~#fst_work_q_lock~0.offset| 0) (<= 0 ~ldv_module_refcounter~0) (<= ~__mod_pci_device_table~0.subdevice 0) (<= 0 |~#fst_card_array~0.offset|) (<= 0 ~__mod_pci_device_table~0.subvendor) (<= |~#type_strings~0.base| 53) (<= 0 ~__mod_pci_device_table~0.class) (<= |~#type_strings~0.offset| 0) (<= 0 |~#type_strings~0.offset|) (<= |~#fst_driver~0.offset| 0) (<= 0 |~#fst_ops~0.offset|) (<= 0 |~#fst_int_task~0.offset|) (<= 49 |~#fst_card_array~0.base|) (<= |~#fst_excluded_list~0.offset| 0) (<= 48 |~#fst_int_task~0.base|) (<= |~#fst_driver~0.base| 55) (<= 53 |~#type_strings~0.base|) (<= ~__mod_pci_device_table~0.driver_data 0) (<= 54 |~#fst_ops~0.base|) (<= 1 ~LDV_IN_INTERRUPT~0) (<= |~#fst_pci_dev_id~0.offset| 0) (<= 0 ~__mod_pci_device_table~0.vendor) (<= |~#fst_work_q_lock~0.base| 50) (<= |~#fst_work_txq~0.offset| 0) (<= ~__mod_pci_device_table~0.device 0) (<= 0 |~#fst_excluded_list~0.offset|) (<= ~fst_txq_high~0 12) (not (= ~ldv_module_refcounter~0 1)) (<= |#NULL.offset| 0) (<= ~__mod_pci_device_table~0.class_mask 0) (<= |~#fst_excluded_list~0.base| 45) (<= 0 |~#fst_tx_task~0.offset|) (<= 51 |~#fst_work_txq~0.base|) (<= |~#fst_pci_dev_id~0.base| 46) (<= ~fst_txq_low~0 8) (<= 12 ~fst_txq_high~0) (<= |~#fst_work_intq~0.base| 52) (<= |~#fst_int_task~0.base| 48) (<= ~fst_max_reads~0 7) (<= 55 |~#fst_driver~0.base|) (<= 0 ~__mod_pci_device_table~0.subdevice) (<= ~__mod_pci_device_table~0.vendor 0) (<= 0 |~#fst_work_q_lock~0.offset|) (<= 0 |~#fst_work_txq~0.offset|) (<= ~__mod_pci_device_table~0.subvendor 0) (<= |#NULL.base| 0) (<= |~#fst_card_array~0.base| 49) (<= |~#fst_ops~0.base| 54) (<= |~#fst_ops~0.offset| 0) (<= 0 |~#fst_driver~0.offset|) (<= 0 ~__mod_pci_device_table~0.driver_data) (<= 47 |~#fst_tx_task~0.base|) (<= 8 ~fst_txq_low~0) (<= 50 |~#fst_work_q_lock~0.base|) (<= 0 ~__mod_pci_device_table~0.class_mask) (<= 0 ~__mod_pci_device_table~0.device) (<= ~fst_excluded_cards~0 0) (<= 52 |~#fst_work_intq~0.base|) (<= 0 |#NULL.offset|) (<= |~#fst_work_txq~0.base| 51) (<= 7 ~fst_max_reads~0) (<= ~__mod_pci_device_table~0.class 0) (<= |~#fst_tx_task~0.base| 47) (<= |~#fst_int_task~0.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |~#fst_work_intq~0.offset|) (<= 0 ~fst_excluded_cards~0))' at error location [2021-11-23 02:06:23,999 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:23,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:23,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2021-11-23 02:06:23,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335034523] [2021-11-23 02:06:23,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:24,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:06:24,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:06:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:06:24,001 INFO L87 Difference]: Start difference. First operand 2070 states and 3023 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:06:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:25,046 INFO L93 Difference]: Finished difference Result 4140 states and 6048 transitions. [2021-11-23 02:06:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:06:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 42 [2021-11-23 02:06:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:25,058 INFO L225 Difference]: With dead ends: 4140 [2021-11-23 02:06:25,058 INFO L226 Difference]: Without dead ends: 2073 [2021-11-23 02:06:25,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:06:25,066 INFO L933 BasicCegarLoop]: 1037 mSDtfsCounter, 0 mSDsluCounter, 2330 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:25,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3109 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:06:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-11-23 02:06:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2021-11-23 02:06:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1298 states have (on average 1.3112480739599384) internal successors, (1702), 1307 states have internal predecessors, (1702), 663 states have call successors, (663), 114 states have call predecessors, (663), 111 states have return successors, (661), 658 states have call predecessors, (661), 661 states have call successors, (661) [2021-11-23 02:06:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3026 transitions. [2021-11-23 02:06:25,200 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3026 transitions. Word has length 42 [2021-11-23 02:06:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:25,201 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3026 transitions. [2021-11-23 02:06:25,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:06:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3026 transitions. [2021-11-23 02:06:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:06:25,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:25,203 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:25,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:25,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:06:25,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1964335399, now seen corresponding path program 2 times [2021-11-23 02:06:25,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:25,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076684759] [2021-11-23 02:06:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:25,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:25,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076684759] [2021-11-23 02:06:25,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076684759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546271952] [2021-11-23 02:06:25,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:06:25,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:25,565 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:25,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:06:26,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 02:06:26,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:06:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:06:26,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:26,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546271952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:26,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:26,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2021-11-23 02:06:26,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455544754] [2021-11-23 02:06:26,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:26,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:06:26,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:06:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:06:26,292 INFO L87 Difference]: Start difference. First operand 2073 states and 3026 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:06:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:37,393 INFO L93 Difference]: Finished difference Result 7207 states and 10669 transitions. [2021-11-23 02:06:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:06:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2021-11-23 02:06:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:37,432 INFO L225 Difference]: With dead ends: 7207 [2021-11-23 02:06:37,432 INFO L226 Difference]: Without dead ends: 5887 [2021-11-23 02:06:37,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:06:37,440 INFO L933 BasicCegarLoop]: 2337 mSDtfsCounter, 3371 mSDsluCounter, 3787 mSDsCounter, 0 mSdLazyCounter, 8103 mSolverCounterSat, 3051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3809 SdHoareTripleChecker+Valid, 5646 SdHoareTripleChecker+Invalid, 11154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3051 IncrementalHoareTripleChecker+Valid, 8103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:37,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3809 Valid, 5646 Invalid, 11154 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3051 Valid, 8103 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 02:06:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5887 states. [2021-11-23 02:06:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5887 to 5863. [2021-11-23 02:06:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5863 states, 3661 states have (on average 1.3179459164162797) internal successors, (4825), 3688 states have internal predecessors, (4825), 1924 states have call successors, (1924), 279 states have call predecessors, (1924), 277 states have return successors, (1925), 1918 states have call predecessors, (1925), 1922 states have call successors, (1925) [2021-11-23 02:06:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5863 states to 5863 states and 8674 transitions. [2021-11-23 02:06:37,840 INFO L78 Accepts]: Start accepts. Automaton has 5863 states and 8674 transitions. Word has length 45 [2021-11-23 02:06:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:37,840 INFO L470 AbstractCegarLoop]: Abstraction has 5863 states and 8674 transitions. [2021-11-23 02:06:37,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:06:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5863 states and 8674 transitions. [2021-11-23 02:06:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:06:37,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:37,843 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:37,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 02:06:38,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:38,056 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:38,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1748923850, now seen corresponding path program 1 times [2021-11-23 02:06:38,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:38,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190089497] [2021-11-23 02:06:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:38,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:38,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:38,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190089497] [2021-11-23 02:06:38,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190089497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:38,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:38,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:06:38,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653235384] [2021-11-23 02:06:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:38,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:06:38,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:06:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:38,214 INFO L87 Difference]: Start difference. First operand 5863 states and 8674 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:43,908 INFO L93 Difference]: Finished difference Result 9017 states and 13432 transitions. [2021-11-23 02:06:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-11-23 02:06:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:43,947 INFO L225 Difference]: With dead ends: 9017 [2021-11-23 02:06:43,947 INFO L226 Difference]: Without dead ends: 9014 [2021-11-23 02:06:43,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:43,952 INFO L933 BasicCegarLoop]: 2867 mSDtfsCounter, 2589 mSDsluCounter, 3873 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2780 SdHoareTripleChecker+Valid, 6179 SdHoareTripleChecker+Invalid, 3203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:43,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2780 Valid, 6179 Invalid, 3203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 02:06:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9014 states. [2021-11-23 02:06:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9014 to 8465. [2021-11-23 02:06:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8465 states, 5280 states have (on average 1.318560606060606) internal successors, (6962), 5320 states have internal predecessors, (6962), 2797 states have call successors, (2797), 388 states have call predecessors, (2797), 387 states have return successors, (2801), 2791 states have call predecessors, (2801), 2795 states have call successors, (2801) [2021-11-23 02:06:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8465 states to 8465 states and 12560 transitions. [2021-11-23 02:06:44,464 INFO L78 Accepts]: Start accepts. Automaton has 8465 states and 12560 transitions. Word has length 45 [2021-11-23 02:06:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:44,464 INFO L470 AbstractCegarLoop]: Abstraction has 8465 states and 12560 transitions. [2021-11-23 02:06:44,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8465 states and 12560 transitions. [2021-11-23 02:06:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:06:44,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:44,467 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:44,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:06:44,468 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1360329180, now seen corresponding path program 1 times [2021-11-23 02:06:44,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:44,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232822020] [2021-11-23 02:06:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:44,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:06:44,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:44,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232822020] [2021-11-23 02:06:44,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232822020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:44,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:44,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:06:44,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073596253] [2021-11-23 02:06:44,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:44,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:06:44,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:06:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:06:44,589 INFO L87 Difference]: Start difference. First operand 8465 states and 12560 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:47,090 INFO L93 Difference]: Finished difference Result 10841 states and 16208 transitions. [2021-11-23 02:06:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:06:47,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-11-23 02:06:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:47,132 INFO L225 Difference]: With dead ends: 10841 [2021-11-23 02:06:47,132 INFO L226 Difference]: Without dead ends: 10833 [2021-11-23 02:06:47,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:06:47,138 INFO L933 BasicCegarLoop]: 1645 mSDtfsCounter, 2075 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2290 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:47,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2290 Valid, 2987 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:06:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10833 states. [2021-11-23 02:06:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10833 to 9707. [2021-11-23 02:06:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9707 states, 6055 states have (on average 1.318579686209744) internal successors, (7984), 6100 states have internal predecessors, (7984), 3209 states have call successors, (3209), 443 states have call predecessors, (3209), 442 states have return successors, (3213), 3203 states have call predecessors, (3213), 3207 states have call successors, (3213) [2021-11-23 02:06:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9707 states to 9707 states and 14406 transitions. [2021-11-23 02:06:47,714 INFO L78 Accepts]: Start accepts. Automaton has 9707 states and 14406 transitions. Word has length 44 [2021-11-23 02:06:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:47,715 INFO L470 AbstractCegarLoop]: Abstraction has 9707 states and 14406 transitions. [2021-11-23 02:06:47,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9707 states and 14406 transitions. [2021-11-23 02:06:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:06:47,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:47,718 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:47,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:06:47,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1951295833, now seen corresponding path program 1 times [2021-11-23 02:06:47,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:47,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719371198] [2021-11-23 02:06:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:47,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:06:47,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:47,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719371198] [2021-11-23 02:06:47,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719371198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:47,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:47,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:06:47,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84859493] [2021-11-23 02:06:47,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:47,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:06:47,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:06:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:06:47,820 INFO L87 Difference]: Start difference. First operand 9707 states and 14406 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:06:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:49,892 INFO L93 Difference]: Finished difference Result 14567 states and 22120 transitions. [2021-11-23 02:06:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-11-23 02:06:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:50,023 INFO L225 Difference]: With dead ends: 14567 [2021-11-23 02:06:50,023 INFO L226 Difference]: Without dead ends: 14561 [2021-11-23 02:06:50,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:50,028 INFO L933 BasicCegarLoop]: 1821 mSDtfsCounter, 974 mSDsluCounter, 2762 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 4315 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:50,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 4315 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:06:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14561 states. [2021-11-23 02:06:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14561 to 9719. [2021-11-23 02:06:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9719 states, 6063 states have (on average 1.318159327065809) internal successors, (7992), 6108 states have internal predecessors, (7992), 3213 states have call successors, (3213), 443 states have call predecessors, (3213), 442 states have return successors, (3217), 3207 states have call predecessors, (3217), 3211 states have call successors, (3217) [2021-11-23 02:06:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9719 states to 9719 states and 14422 transitions. [2021-11-23 02:06:50,712 INFO L78 Accepts]: Start accepts. Automaton has 9719 states and 14422 transitions. Word has length 47 [2021-11-23 02:06:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:50,712 INFO L470 AbstractCegarLoop]: Abstraction has 9719 states and 14422 transitions. [2021-11-23 02:06:50,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:06:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9719 states and 14422 transitions. [2021-11-23 02:06:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:06:50,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:50,716 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 02:06:50,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:06:50,716 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -924560926, now seen corresponding path program 1 times [2021-11-23 02:06:50,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:50,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843302709] [2021-11-23 02:06:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:50,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:06:50,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:50,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843302709] [2021-11-23 02:06:50,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843302709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:50,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769072316] [2021-11-23 02:06:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:50,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:50,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:50,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:50,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:06:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:06:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:06:51,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:06:51,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769072316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:51,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484114254] [2021-11-23 02:06:51,419 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-23 02:06:51,419 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:51,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:51,420 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:51,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:52,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:54,273 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:06:54,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:06:54,485 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 40 treesize of output 41 [2021-11-23 02:06:54,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:54,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1541 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 446 [2021-11-23 02:06:54,849 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 40 treesize of output 41 [2021-11-23 02:06:54,947 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 50 treesize of output 47 [2021-11-23 02:06:55,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:06:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 614 [2021-11-23 02:06:56,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 728 treesize of output 716 [2021-11-23 02:06:56,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:07:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6553 treesize of output 6216 [2021-11-23 02:07:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 6546 treesize of output 6265 [2021-11-23 02:07:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6543 treesize of output 6206 [2021-11-23 02:07:02,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6536 treesize of output 6514 [2021-11-23 02:07:10,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:07:10,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:07:10,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:07:10,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:07:13,686 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 100 for LOIs [2021-11-23 02:07:13,714 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 97 for LOIs [2021-11-23 02:07:13,723 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 133 for LOIs [2021-11-23 02:07:13,777 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 106 for LOIs [2021-11-23 02:07:13,787 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:28,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1484114254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:28,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:28,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 6, 7] total 38 [2021-11-23 02:07:28,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429726083] [2021-11-23 02:07:28,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:28,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 02:07:28,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 02:07:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:07:28,721 INFO L87 Difference]: Start difference. First operand 9719 states and 14422 transitions. Second operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 20 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:07:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:32,528 INFO L93 Difference]: Finished difference Result 17385 states and 25851 transitions. [2021-11-23 02:07:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 02:07:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 20 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-11-23 02:07:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:32,565 INFO L225 Difference]: With dead ends: 17385 [2021-11-23 02:07:32,565 INFO L226 Difference]: Without dead ends: 9724 [2021-11-23 02:07:32,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:07:32,592 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 6 mSDsluCounter, 11998 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12168 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2474 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:32,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 12168 Invalid, 3205 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 730 Invalid, 0 Unknown, 2474 Unchecked, 3.4s Time] [2021-11-23 02:07:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9724 states. [2021-11-23 02:07:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9724 to 9713. [2021-11-23 02:07:33,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9713 states, 6059 states have (on average 1.3183693678824888) internal successors, (7988), 6104 states have internal predecessors, (7988), 3212 states have call successors, (3212), 442 states have call predecessors, (3212), 441 states have return successors, (3216), 3206 states have call predecessors, (3216), 3210 states have call successors, (3216) [2021-11-23 02:07:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9713 states to 9713 states and 14416 transitions. [2021-11-23 02:07:33,149 INFO L78 Accepts]: Start accepts. Automaton has 9713 states and 14416 transitions. Word has length 49 [2021-11-23 02:07:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:33,150 INFO L470 AbstractCegarLoop]: Abstraction has 9713 states and 14416 transitions. [2021-11-23 02:07:33,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 20 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:07:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 9713 states and 14416 transitions. [2021-11-23 02:07:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:07:33,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:33,153 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 02:07:33,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:33,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:07:33,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1982060955, now seen corresponding path program 1 times [2021-11-23 02:07:33,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:33,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197416951] [2021-11-23 02:07:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:33,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:07:33,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197416951] [2021-11-23 02:07:33,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197416951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:33,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338516057] [2021-11-23 02:07:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:33,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:33,476 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:33,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:07:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:33,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:07:33,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:07:34,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:07:34,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338516057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591552743] [2021-11-23 02:07:34,192 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2021-11-23 02:07:34,192 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:34,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:34,193 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:34,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,423 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:07:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:07:36,696 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 40 treesize of output 41 [2021-11-23 02:07:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:39,121 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:07:39,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:07:39,314 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 40 treesize of output 41 [2021-11-23 02:07:39,430 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 50 treesize of output 47 [2021-11-23 02:07:39,483 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:07:39,498 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:07:39,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:07:39,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:07:39,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:07:39,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:07:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:39,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:07:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:39,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:07:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:07:39,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:07:39,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:07:40,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:07:48,773 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 137 for LOIs [2021-11-23 02:07:48,826 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 133 for LOIs [2021-11-23 02:07:48,844 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:07:48,863 INFO L197 IcfgInterpreter]: Interpreting procedure netif_wake_queue with input of size 131 for LOIs [2021-11-23 02:07:49,050 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:07:49,071 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_get_tx_queue with input of size 133 for LOIs [2021-11-23 02:07:49,090 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:33,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [591552743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:33,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:08:33,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [4, 6, 7] total 48 [2021-11-23 02:08:33,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815772420] [2021-11-23 02:08:33,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:33,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:08:33,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:08:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:08:33,525 INFO L87 Difference]: Start difference. First operand 9713 states and 14416 transitions. Second operand has 36 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:08:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:41,274 INFO L93 Difference]: Finished difference Result 9780 states and 14495 transitions. [2021-11-23 02:08:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 02:08:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-11-23 02:08:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:41,310 INFO L225 Difference]: With dead ends: 9780 [2021-11-23 02:08:41,310 INFO L226 Difference]: Without dead ends: 9773 [2021-11-23 02:08:41,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:08:41,319 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 13 mSDsluCounter, 18217 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 17885 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1471 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:41,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 17885 Invalid, 2735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1261 Invalid, 0 Unknown, 1471 Unchecked, 7.3s Time] [2021-11-23 02:08:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9773 states. [2021-11-23 02:08:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9773 to 9770. [2021-11-23 02:08:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9770 states, 6100 states have (on average 1.318032786885246) internal successors, (8040), 6145 states have internal predecessors, (8040), 3220 states have call successors, (3220), 450 states have call predecessors, (3220), 449 states have return successors, (3224), 3214 states have call predecessors, (3224), 3218 states have call successors, (3224) [2021-11-23 02:08:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9770 states to 9770 states and 14484 transitions. [2021-11-23 02:08:42,049 INFO L78 Accepts]: Start accepts. Automaton has 9770 states and 14484 transitions. Word has length 51 [2021-11-23 02:08:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:42,049 INFO L470 AbstractCegarLoop]: Abstraction has 9770 states and 14484 transitions. [2021-11-23 02:08:42,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:08:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 9770 states and 14484 transitions. [2021-11-23 02:08:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:08:42,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:42,053 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 02:08:42,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:42,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:08:42,268 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash -479221084, now seen corresponding path program 1 times [2021-11-23 02:08:42,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:42,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097406324] [2021-11-23 02:08:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:42,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:08:42,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:42,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097406324] [2021-11-23 02:08:42,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097406324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:42,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356972524] [2021-11-23 02:08:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:42,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:42,368 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:42,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:08:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:08:42,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:08:42,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:08:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356972524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:43,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196505639] [2021-11-23 02:08:43,040 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2021-11-23 02:08:43,040 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:43,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:43,041 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:43,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:43,526 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 40 treesize of output 41 [2021-11-23 02:08:43,577 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 40 treesize of output 41 [2021-11-23 02:08:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:45,180 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:08:45,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:08:45,452 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 50 treesize of output 47 [2021-11-23 02:08:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:48,046 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:08:48,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:08:48,249 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:08:48,260 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:08:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:08:48,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:08:48,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:08:48,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:08:48,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:48,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:08:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:48,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:08:48,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:08:48,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:08:48,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:08:48,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:08:57,466 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 137 for LOIs [2021-11-23 02:08:57,520 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 133 for LOIs [2021-11-23 02:08:57,538 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:08:57,557 INFO L197 IcfgInterpreter]: Interpreting procedure netif_wake_queue with input of size 131 for LOIs [2021-11-23 02:08:57,746 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:08:57,769 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_get_tx_queue with input of size 133 for LOIs [2021-11-23 02:08:57,788 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:44,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1196505639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:44,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:09:44,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [4, 6, 7] total 49 [2021-11-23 02:09:44,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262694453] [2021-11-23 02:09:44,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:44,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 02:09:44,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 02:09:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 02:09:44,809 INFO L87 Difference]: Start difference. First operand 9770 states and 14484 transitions. Second operand has 37 states, 29 states have (on average 1.206896551724138) internal successors, (35), 27 states have internal predecessors, (35), 6 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:09:54,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:09:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:56,421 INFO L93 Difference]: Finished difference Result 9844 states and 14579 transitions. [2021-11-23 02:09:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 02:09:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 29 states have (on average 1.206896551724138) internal successors, (35), 27 states have internal predecessors, (35), 6 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2021-11-23 02:09:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:56,455 INFO L225 Difference]: With dead ends: 9844 [2021-11-23 02:09:56,455 INFO L226 Difference]: Without dead ends: 9837 [2021-11-23 02:09:56,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 02:09:56,463 INFO L933 BasicCegarLoop]: 1040 mSDtfsCounter, 34 mSDsluCounter, 13548 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 13395 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1595 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:56,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 13395 Invalid, 3083 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 1477 Invalid, 0 Unknown, 1595 Unchecked, 7.7s Time] [2021-11-23 02:09:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9837 states. [2021-11-23 02:09:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9837 to 9820. [2021-11-23 02:09:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9820 states, 6136 states have (on average 1.318122555410691) internal successors, (8088), 6181 states have internal predecessors, (8088), 3227 states have call successors, (3227), 457 states have call predecessors, (3227), 456 states have return successors, (3231), 3221 states have call predecessors, (3231), 3225 states have call successors, (3231) [2021-11-23 02:09:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9820 states to 9820 states and 14546 transitions. [2021-11-23 02:09:57,098 INFO L78 Accepts]: Start accepts. Automaton has 9820 states and 14546 transitions. Word has length 52 [2021-11-23 02:09:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:57,098 INFO L470 AbstractCegarLoop]: Abstraction has 9820 states and 14546 transitions. [2021-11-23 02:09:57,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 29 states have (on average 1.206896551724138) internal successors, (35), 27 states have internal predecessors, (35), 6 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:09:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 9820 states and 14546 transitions. [2021-11-23 02:09:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:09:57,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:57,103 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 02:09:57,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:57,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:09:57,328 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1629435584, now seen corresponding path program 1 times [2021-11-23 02:09:57,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:57,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842956446] [2021-11-23 02:09:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:57,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:09:57,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842956446] [2021-11-23 02:09:57,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842956446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579926210] [2021-11-23 02:09:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:57,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:57,470 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:57,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:09:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:09:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:09:57,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:09:58,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579926210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:09:58,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308723520] [2021-11-23 02:09:58,087 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2021-11-23 02:09:58,087 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:58,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:58,088 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:58,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:58,558 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 40 treesize of output 41 [2021-11-23 02:09:58,629 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 50 treesize of output 47 [2021-11-23 02:09:58,714 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 40 treesize of output 41 [2021-11-23 02:09:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:00,296 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:10:00,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:10:00,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:02,888 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:10:02,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:10:03,125 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:10:03,135 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:10:03,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:03,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:10:03,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:03,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:10:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:03,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:10:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:10:03,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:03,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:03,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:10:03,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:10:08,499 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 137 for LOIs [2021-11-23 02:10:08,553 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:10:08,572 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 170 for LOIs [2021-11-23 02:10:08,676 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:10:08,697 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:10:35,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [308723520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:35,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:10:35,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [7, 6, 7] total 41 [2021-11-23 02:10:35,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016465826] [2021-11-23 02:10:35,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 02:10:35,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 02:10:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:10:35,637 INFO L87 Difference]: Start difference. First operand 9820 states and 14546 transitions. Second operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:10:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:41,547 INFO L93 Difference]: Finished difference Result 17491 states and 25982 transitions. [2021-11-23 02:10:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:10:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2021-11-23 02:10:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:41,571 INFO L225 Difference]: With dead ends: 17491 [2021-11-23 02:10:41,571 INFO L226 Difference]: Without dead ends: 9830 [2021-11-23 02:10:41,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:10:41,594 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 7 mSDsluCounter, 10734 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10796 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1550 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:41,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10796 Invalid, 2558 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1007 Invalid, 0 Unknown, 1550 Unchecked, 5.5s Time] [2021-11-23 02:10:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9830 states. [2021-11-23 02:10:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9830 to 9822. [2021-11-23 02:10:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9822 states, 6138 states have (on average 1.3181818181818181) internal successors, (8091), 6182 states have internal predecessors, (8091), 3227 states have call successors, (3227), 457 states have call predecessors, (3227), 456 states have return successors, (3231), 3222 states have call predecessors, (3231), 3225 states have call successors, (3231) [2021-11-23 02:10:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9822 states to 9822 states and 14549 transitions. [2021-11-23 02:10:42,211 INFO L78 Accepts]: Start accepts. Automaton has 9822 states and 14549 transitions. Word has length 52 [2021-11-23 02:10:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:42,211 INFO L470 AbstractCegarLoop]: Abstraction has 9822 states and 14549 transitions. [2021-11-23 02:10:42,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:10:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 9822 states and 14549 transitions. [2021-11-23 02:10:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:10:42,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:42,216 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 02:10:42,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-23 02:10:42,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:42,432 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1801374284, now seen corresponding path program 1 times [2021-11-23 02:10:42,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:42,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488780005] [2021-11-23 02:10:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:42,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:10:42,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:42,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488780005] [2021-11-23 02:10:42,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488780005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778369862] [2021-11-23 02:10:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:42,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:42,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:42,528 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:42,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:10:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:10:42,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:10:43,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:10:43,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778369862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:43,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795967656] [2021-11-23 02:10:43,141 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2021-11-23 02:10:43,141 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:10:43,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:10:43,142 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:10:43,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:10:43,743 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 50 treesize of output 47 [2021-11-23 02:10:43,877 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 40 treesize of output 41 [2021-11-23 02:10:43,935 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 40 treesize of output 41 [2021-11-23 02:10:44,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:45,480 INFO L354 Elim1Store]: treesize reduction 560, result has 45.5 percent of original size [2021-11-23 02:10:45,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1487 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 54 case distinctions, treesize of input 282 treesize of output 642 [2021-11-23 02:10:45,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:48,045 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:10:48,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:10:48,242 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:10:48,252 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2021-11-23 02:10:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:10:48,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:48,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:48,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:48,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-23 02:10:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:48,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-23 02:10:48,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:10:48,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:48,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:10:48,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:10:48,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:10:49,601 INFO L354 Elim1Store]: treesize reduction 61, result has 22.8 percent of original size [2021-11-23 02:10:49,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 39 [2021-11-23 02:10:49,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:10:50,556 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-23 02:10:50,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2021-11-23 02:10:51,458 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:10:51,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 02:10:51,530 INFO L354 Elim1Store]: treesize reduction 61, result has 22.8 percent of original size [2021-11-23 02:10:51,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 39 [2021-11-23 02:10:52,607 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-23 02:10:52,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2021-11-23 02:10:55,818 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 163 for LOIs [2021-11-23 02:10:55,879 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 134 for LOIs [2021-11-23 02:10:55,904 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 163 for LOIs [2021-11-23 02:10:56,000 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 144 for LOIs [2021-11-23 02:10:56,022 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:11:25,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1795967656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:25,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:11:25,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [7, 6, 7] total 42 [2021-11-23 02:11:25,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742010434] [2021-11-23 02:11:25,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:25,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 02:11:25,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 02:11:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 02:11:25,151 INFO L87 Difference]: Start difference. First operand 9822 states and 14549 transitions. Second operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:11:38,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:42,454 INFO L93 Difference]: Finished difference Result 17680 states and 26285 transitions. [2021-11-23 02:11:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 02:11:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2021-11-23 02:11:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:42,479 INFO L225 Difference]: With dead ends: 17680 [2021-11-23 02:11:42,479 INFO L226 Difference]: Without dead ends: 10019 [2021-11-23 02:11:42,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:11:42,503 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 144 mSDsluCounter, 12359 mSDsCounter, 0 mSdLazyCounter, 3950 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 12422 SdHoareTripleChecker+Invalid, 5944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1978 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:42,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 12422 Invalid, 5944 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 3950 Invalid, 0 Unknown, 1978 Unchecked, 15.4s Time] [2021-11-23 02:11:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10019 states. [2021-11-23 02:11:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10019 to 9837. [2021-11-23 02:11:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9837 states, 6150 states have (on average 1.3183739837398374) internal successors, (8108), 6195 states have internal predecessors, (8108), 3229 states have call successors, (3229), 458 states have call predecessors, (3229), 457 states have return successors, (3233), 3223 states have call predecessors, (3233), 3227 states have call successors, (3233) [2021-11-23 02:11:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 14570 transitions. [2021-11-23 02:11:43,197 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 14570 transitions. Word has length 55 [2021-11-23 02:11:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:43,198 INFO L470 AbstractCegarLoop]: Abstraction has 9837 states and 14570 transitions. [2021-11-23 02:11:43,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:11:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 14570 transitions. [2021-11-23 02:11:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:11:43,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:43,202 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-23 02:11:43,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:43,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:43,428 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:43,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1577696389, now seen corresponding path program 1 times [2021-11-23 02:11:43,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:43,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095079156] [2021-11-23 02:11:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:43,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:11:43,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095079156] [2021-11-23 02:11:43,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095079156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:43,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:43,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:43,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515669595] [2021-11-23 02:11:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:43,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:43,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:43,514 INFO L87 Difference]: Start difference. First operand 9837 states and 14570 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:11:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:44,872 INFO L93 Difference]: Finished difference Result 21033 states and 31607 transitions. [2021-11-23 02:11:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2021-11-23 02:11:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:44,905 INFO L225 Difference]: With dead ends: 21033 [2021-11-23 02:11:44,905 INFO L226 Difference]: Without dead ends: 13369 [2021-11-23 02:11:44,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:44,922 INFO L933 BasicCegarLoop]: 1775 mSDtfsCounter, 453 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:44,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 2961 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:11:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13369 states. [2021-11-23 02:11:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13369 to 13361. [2021-11-23 02:11:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13361 states, 8407 states have (on average 1.3292494349946473) internal successors, (11175), 8459 states have internal predecessors, (11175), 4496 states have call successors, (4496), 458 states have call predecessors, (4496), 457 states have return successors, (4500), 4490 states have call predecessors, (4500), 4494 states have call successors, (4500) [2021-11-23 02:11:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13361 states to 13361 states and 20171 transitions. [2021-11-23 02:11:45,684 INFO L78 Accepts]: Start accepts. Automaton has 13361 states and 20171 transitions. Word has length 56 [2021-11-23 02:11:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:45,684 INFO L470 AbstractCegarLoop]: Abstraction has 13361 states and 20171 transitions. [2021-11-23 02:11:45,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:11:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 13361 states and 20171 transitions. [2021-11-23 02:11:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 02:11:45,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:45,689 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-23 02:11:45,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:11:45,690 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:45,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1616553800, now seen corresponding path program 1 times [2021-11-23 02:11:45,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:45,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136286955] [2021-11-23 02:11:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:45,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:11:45,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136286955] [2021-11-23 02:11:45,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136286955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046776244] [2021-11-23 02:11:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:45,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:45,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:45,784 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:45,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eede1ba0-ec16-49fc-ba8f-b02bb1b4e5e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:11:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:46,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:11:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:11:46,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:11:46,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046776244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:46,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1226179712] [2021-11-23 02:11:46,397 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:11:46,398 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:11:46,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:11:46,398 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:11:46,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:11:46,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:49,179 INFO L354 Elim1Store]: treesize reduction 972, result has 33.4 percent of original size [2021-11-23 02:11:49,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1542 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 673 [2021-11-23 02:11:49,424 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 40 treesize of output 41 [2021-11-23 02:11:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:49,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1541 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 446 [2021-11-23 02:11:49,717 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 40 treesize of output 41 [2021-11-23 02:11:49,888 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 50 treesize of output 47 [2021-11-23 02:11:50,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 614 [2021-11-23 02:11:50,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 728 treesize of output 716 [2021-11-23 02:11:50,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:11:51,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 663 [2021-11-23 02:11:55,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6553 treesize of output 6216 [2021-11-23 02:11:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:56,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 6546 treesize of output 6265 [2021-11-23 02:11:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:11:57,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 6543 treesize of output 6206 [2021-11-23 02:11:58,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6536 treesize of output 6514 [2021-11-23 02:12:05,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:12:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-23 02:12:05,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:12:05,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-23 02:12:17,618 INFO L197 IcfgInterpreter]: Interpreting procedure dev_to_hdlc with input of size 171 for LOIs [2021-11-23 02:12:17,665 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 98 for LOIs [2021-11-23 02:12:17,674 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_blast_assert with input of size 97 for LOIs [2021-11-23 02:12:17,682 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 97 for LOIs [2021-11-23 02:12:17,696 INFO L197 IcfgInterpreter]: Interpreting procedure netif_wake_queue with input of size 96 for LOIs [2021-11-23 02:12:17,807 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 106 for LOIs [2021-11-23 02:12:17,817 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_get_tx_queue with input of size 98 for LOIs [2021-11-23 02:12:17,827 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:12:43,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '431435#(and (= |~#fst_tx_task~0.base| 47) (<= 1 ~ldv_module_refcounter~0) (= |~#fst_pci_dev_id~0.base| 46) (= ~LDV_IN_INTERRUPT~0 1) (= |~#fst_work_q_lock~0.base| 50) (= |~#type_strings~0.offset| 0) (= ~__mod_pci_device_table~0.class_mask 0) (= |~#fst_int_task~0.offset| 0) (= ~__mod_pci_device_table~0.subvendor 0) (= |~#fst_ops~0.base| 54) (= ~__mod_pci_device_table~0.class 0) (= |~#fst_work_intq~0.offset| 0) (= 55 |~#fst_driver~0.base|) (= 53 |~#type_strings~0.base|) (not (= ~ldv_module_refcounter~0 1)) (= |~#fst_int_task~0.base| 48) (= |~#fst_pci_dev_id~0.offset| 0) (= 12 ~fst_txq_high~0) (= 0 |~#fst_tx_task~0.offset|) (= |~#fst_excluded_list~0.offset| 0) (= ~fst_txq_low~0 8) (= 49 |~#fst_card_array~0.base|) (= 52 |~#fst_work_intq~0.base|) (= |~#fst_excluded_list~0.base| 45) (= ~fst_excluded_cards~0 0) (= ~__mod_pci_device_table~0.device 0) (<= ~ldv_module_refcounter~0 2) (= |~#fst_ops~0.offset| 0) (= 51 |~#fst_work_txq~0.base|) (= ~__mod_pci_device_table~0.driver_data 0) (= ~__mod_pci_device_table~0.vendor 0) (= ~__mod_pci_device_table~0.subdevice 0) (= |~#fst_driver~0.offset| 0) (= |#NULL.offset| 0) (= 7 ~fst_max_reads~0) (= |~#fst_work_q_lock~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |~#fst_work_txq~0.offset| 0) (= |#NULL.base| 0) (= |~#fst_card_array~0.offset| 0))' at error location [2021-11-23 02:12:43,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:12:43,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:12:43,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2021-11-23 02:12:43,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359623688] [2021-11-23 02:12:43,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:12:43,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:12:43,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:12:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2390, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:12:43,308 INFO L87 Difference]: Start difference. First operand 13361 states and 20171 transitions. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17)