./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/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_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/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_cac31da0-188c-4b0e-ac39-fb3579ad485a/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 c63ca5a13217ab3c82769d6ebc8e69dd180f3b7d25df235b9ae7098d5fa1543b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:27:46,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:27:46,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:27:46,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:27:46,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:27:46,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:27:46,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:27:46,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:27:46,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:27:46,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:27:46,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:27:46,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:27:46,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:27:46,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:27:46,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:27:46,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:27:46,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:27:46,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:27:46,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:27:46,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:27:46,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:27:46,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:27:46,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:27:46,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:27:46,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:27:46,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:27:46,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:27:46,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:27:46,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:27:46,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:27:46,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:27:46,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:27:46,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:27:46,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:27:46,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:27:46,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:27:46,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:27:46,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:27:46,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:27:46,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:27:46,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:27:46,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:27:46,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:27:46,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:27:46,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:27:46,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:27:46,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:27:46,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:27:46,547 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:27:46,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:27:46,547 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:27:46,547 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:27:46,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:27:46,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:27:46,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:27:46,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:27:46,549 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:27:46,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:27:46,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:27:46,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:27:46,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:27:46,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:27:46,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:27:46,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:27:46,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:27:46,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:27:46,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:27:46,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:27:46,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:27:46,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:27:46,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:27:46,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:27:46,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:27:46,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:27:46,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:27:46,556 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:27:46,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:27:46,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:27:46,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:27:46,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:27:46,557 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_cac31da0-188c-4b0e-ac39-fb3579ad485a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c63ca5a13217ab3c82769d6ebc8e69dd180f3b7d25df235b9ae7098d5fa1543b [2021-11-23 03:27:46,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:27:46,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:27:46,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:27:46,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:27:46,876 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:27:46,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2021-11-23 03:27:46,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/data/f2709d168/55cf037b8fc746fc803424b0a18c1736/FLAG1c122d05d [2021-11-23 03:27:47,706 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:27:47,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2021-11-23 03:27:47,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/data/f2709d168/55cf037b8fc746fc803424b0a18c1736/FLAG1c122d05d [2021-11-23 03:27:47,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/data/f2709d168/55cf037b8fc746fc803424b0a18c1736 [2021-11-23 03:27:47,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:27:47,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:27:47,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:27:47,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:27:47,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:27:47,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:47" (1/1) ... [2021-11-23 03:27:47,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44efe65e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:47, skipping insertion in model container [2021-11-23 03:27:47,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:47" (1/1) ... [2021-11-23 03:27:47,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:27:47,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:27:49,344 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_cac31da0-188c-4b0e-ac39-fb3579ad485a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i[198983,198996] [2021-11-23 03:27:49,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:27:49,454 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:27:49,883 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_cac31da0-188c-4b0e-ac39-fb3579ad485a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i[198983,198996] [2021-11-23 03:27:49,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:27:50,008 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:27:50,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50 WrapperNode [2021-11-23 03:27:50,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:27:50,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:27:50,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:27:50,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:27:50,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,285 INFO L137 Inliner]: procedures = 244, calls = 1516, calls flagged for inlining = 92, calls inlined = 80, statements flattened = 2942 [2021-11-23 03:27:50,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:27:50,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:27:50,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:27:50,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:27:50,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:27:50,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:27:50,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:27:50,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:27:50,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (1/1) ... [2021-11-23 03:27:50,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:27:50,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:27:50,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:27:50,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:27:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 03:27:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 03:27:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2021-11-23 03:27:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2021-11-23 03:27:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-23 03:27:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 03:27:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 03:27:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 03:27:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 03:27:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_compat_ioctl [2021-11-23 03:27:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_compat_ioctl [2021-11-23 03:27:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:27:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:27:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:27:50,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:27:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:27:50,575 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:27:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_read [2021-11-23 03:27:50,575 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_read [2021-11-23 03:27:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_compat_ioctl [2021-11-23 03:27:50,575 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_compat_ioctl [2021-11-23 03:27:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 03:27:50,576 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 03:27:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:27:50,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:27:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_release [2021-11-23 03:27:50,576 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_release [2021-11-23 03:27:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_open [2021-11-23 03:27:50,576 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_open [2021-11-23 03:27:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-23 03:27:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-23 03:27:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_get [2021-11-23 03:27:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_get [2021-11-23 03:27:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure __vfio_group_unset_container [2021-11-23 03:27:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __vfio_group_unset_container [2021-11-23 03:27:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_unl_ioctl [2021-11-23 03:27:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_unl_ioctl [2021-11-23 03:27:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:27:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:27:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:27:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:27:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_compat_ioctl [2021-11-23 03:27:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_compat_ioctl [2021-11-23 03:27:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure fdput [2021-11-23 03:27:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure fdput [2021-11-23 03:27:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_dev_viable [2021-11-23 03:27:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_dev_viable [2021-11-23 03:27:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 03:27:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 03:27:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_mmap [2021-11-23 03:27:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_mmap [2021-11-23 03:27:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:27:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:27:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_put [2021-11-23 03:27:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_put [2021-11-23 03:27:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_try_dissolve_container [2021-11-23 03:27:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_try_dissolve_container [2021-11-23 03:27:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_unlock_and_free [2021-11-23 03:27:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_unlock_and_free [2021-11-23 03:27:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_release [2021-11-23 03:27:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_release [2021-11-23 03:27:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:27:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 03:27:50,581 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 03:27:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_write [2021-11-23 03:27:50,581 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_write [2021-11-23 03:27:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2021-11-23 03:27:50,581 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2021-11-23 03:27:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:27:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_unl_ioctl [2021-11-23 03:27:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_unl_ioctl [2021-11-23 03:27:50,582 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 03:27:50,582 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:27:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:27:50,582 INFO L130 BoogieDeclarations]: Found specification of procedure up_write [2021-11-23 03:27:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure up_write [2021-11-23 03:27:50,582 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-23 03:27:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-23 03:27:50,582 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-23 03:27:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-23 03:27:50,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:27:50,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:27:50,583 INFO L130 BoogieDeclarations]: Found specification of procedure iommu_group_id [2021-11-23 03:27:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure iommu_group_id [2021-11-23 03:27:50,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_1 [2021-11-23 03:27:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_1 [2021-11-23 03:27:50,583 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-23 03:27:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-23 03:27:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-23 03:27:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-23 03:27:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-23 03:27:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-23 03:27:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 03:27:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 03:27:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:27:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:27:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 03:27:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 03:27:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:27:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure iommu_group_put [2021-11-23 03:27:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure iommu_group_put [2021-11-23 03:27:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-11-23 03:27:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-11-23 03:27:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-23 03:27:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-23 03:27:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:27:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_put [2021-11-23 03:27:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_put [2021-11-23 03:27:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-23 03:27:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-23 03:27:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put_mutex [2021-11-23 03:27:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put_mutex [2021-11-23 03:27:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:27:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_put_external_user [2021-11-23 03:27:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_put_external_user [2021-11-23 03:27:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_cmpxchg [2021-11-23 03:27:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_cmpxchg [2021-11-23 03:27:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:27:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:27:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_read [2021-11-23 03:27:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_read [2021-11-23 03:27:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_get [2021-11-23 03:27:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_get [2021-11-23 03:27:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-11-23 03:27:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-11-23 03:27:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:27:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_unl_ioctl [2021-11-23 03:27:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_unl_ioctl [2021-11-23 03:27:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 03:27:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 03:27:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:27:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:27:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-23 03:27:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-23 03:27:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:27:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:27:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure compat_ptr [2021-11-23 03:27:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure compat_ptr [2021-11-23 03:27:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:27:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:27:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:27:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_mmap [2021-11-23 03:27:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_mmap [2021-11-23 03:27:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2021-11-23 03:27:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2021-11-23 03:27:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:27:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-23 03:27:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-23 03:27:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:27:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:27:50,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:27:50,591 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add_unless [2021-11-23 03:27:50,591 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add_unless [2021-11-23 03:27:50,591 INFO L130 BoogieDeclarations]: Found specification of procedure kref_init [2021-11-23 03:27:50,591 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_init [2021-11-23 03:27:50,591 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_write [2021-11-23 03:27:50,591 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_write [2021-11-23 03:27:50,591 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_ioctl_check_extension [2021-11-23 03:27:50,591 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_ioctl_check_extension [2021-11-23 03:27:50,592 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_free_group_minor [2021-11-23 03:27:50,592 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_free_group_minor [2021-11-23 03:27:50,592 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-23 03:27:50,592 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-23 03:27:50,592 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-23 03:27:50,592 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-23 03:27:50,592 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-23 03:27:50,592 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-23 03:27:50,592 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_get_device [2021-11-23 03:27:50,592 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_get_device [2021-11-23 03:27:50,593 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 03:27:50,593 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 03:27:50,593 INFO L130 BoogieDeclarations]: Found specification of procedure down_write [2021-11-23 03:27:50,593 INFO L138 BoogieDeclarations]: Found implementation of procedure down_write [2021-11-23 03:27:50,593 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_container_put [2021-11-23 03:27:50,593 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_container_put [2021-11-23 03:27:50,593 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:27:50,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:27:50,594 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-23 03:27:50,594 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-23 03:27:50,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:27:50,594 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 03:27:50,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 03:27:50,594 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_viable [2021-11-23 03:27:50,594 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_viable [2021-11-23 03:27:50,594 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_ioctl_set_iommu [2021-11-23 03:27:50,594 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_ioctl_set_iommu [2021-11-23 03:27:50,594 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_open [2021-11-23 03:27:50,595 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_open [2021-11-23 03:27:50,595 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_release [2021-11-23 03:27:50,595 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_release [2021-11-23 03:27:50,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:27:50,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:27:50,596 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:27:50,596 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:27:51,256 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:27:51,262 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:27:51,501 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:27:53,787 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:27:54,185 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:27:54,186 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:27:54,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:54 BoogieIcfgContainer [2021-11-23 03:27:54,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:27:54,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:27:54,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:27:54,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:27:54,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:27:47" (1/3) ... [2021-11-23 03:27:54,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40865633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:54, skipping insertion in model container [2021-11-23 03:27:54,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:50" (2/3) ... [2021-11-23 03:27:54,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40865633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:54, skipping insertion in model container [2021-11-23 03:27:54,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:54" (3/3) ... [2021-11-23 03:27:54,201 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2021-11-23 03:27:54,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:27:54,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:27:54,273 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:27:54,291 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 03:27:54,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:27:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 969 states, 580 states have (on average 1.3189655172413792) internal successors, (765), 603 states have internal predecessors, (765), 300 states have call successors, (300), 88 states have call predecessors, (300), 87 states have return successors, (295), 293 states have call predecessors, (295), 295 states have call successors, (295) [2021-11-23 03:27:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-23 03:27:54,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:54,373 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:54,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:27:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash -720815502, now seen corresponding path program 1 times [2021-11-23 03:27:54,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:27:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903126441] [2021-11-23 03:27:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:54,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:27:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-23 03:27:55,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:27:55,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903126441] [2021-11-23 03:27:55,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903126441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:55,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:55,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:27:55,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331032023] [2021-11-23 03:27:55,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:55,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:27:55,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:27:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:27:55,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:27:55,317 INFO L87 Difference]: Start difference. First operand has 969 states, 580 states have (on average 1.3189655172413792) internal successors, (765), 603 states have internal predecessors, (765), 300 states have call successors, (300), 88 states have call predecessors, (300), 87 states have return successors, (295), 293 states have call predecessors, (295), 295 states have call successors, (295) Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 03:27:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:56,184 INFO L93 Difference]: Finished difference Result 2737 states and 3980 transitions. [2021-11-23 03:27:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:27:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 236 [2021-11-23 03:27:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:56,234 INFO L225 Difference]: With dead ends: 2737 [2021-11-23 03:27:56,234 INFO L226 Difference]: Without dead ends: 1810 [2021-11-23 03:27:56,252 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 03:27:56,267 INFO L933 BasicCegarLoop]: 1480 mSDtfsCounter, 1237 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2664 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:56,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 2664 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:27:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-11-23 03:27:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1807. [2021-11-23 03:27:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1096 states have (on average 1.3156934306569343) internal successors, (1442), 1126 states have internal predecessors, (1442), 541 states have call successors, (541), 170 states have call predecessors, (541), 169 states have return successors, (539), 535 states have call predecessors, (539), 539 states have call successors, (539) [2021-11-23 03:27:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2522 transitions. [2021-11-23 03:27:56,538 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2522 transitions. Word has length 236 [2021-11-23 03:27:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:56,542 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2522 transitions. [2021-11-23 03:27:56,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 03:27:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2522 transitions. [2021-11-23 03:27:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-23 03:27:56,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:56,563 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:56,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:27:56,563 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:27:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash -456412833, now seen corresponding path program 1 times [2021-11-23 03:27:56,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:27:56,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925686438] [2021-11-23 03:27:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:56,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:27:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-23 03:27:57,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:27:57,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925686438] [2021-11-23 03:27:57,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925686438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:57,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:57,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:27:57,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141764879] [2021-11-23 03:27:57,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:27:57,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:27:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:27:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:27:57,080 INFO L87 Difference]: Start difference. First operand 1807 states and 2522 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 03:27:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:57,709 INFO L93 Difference]: Finished difference Result 5212 states and 7423 transitions. [2021-11-23 03:27:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:27:57,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 256 [2021-11-23 03:27:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:57,742 INFO L225 Difference]: With dead ends: 5212 [2021-11-23 03:27:57,742 INFO L226 Difference]: Without dead ends: 3447 [2021-11-23 03:27:57,753 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 03:27:57,755 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1207 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:57,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 2703 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:27:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-11-23 03:27:57,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 3437. [2021-11-23 03:27:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 2089 states have (on average 1.3197702249880325) internal successors, (2757), 2145 states have internal predecessors, (2757), 1017 states have call successors, (1017), 331 states have call predecessors, (1017), 330 states have return successors, (1045), 1007 states have call predecessors, (1045), 1015 states have call successors, (1045) [2021-11-23 03:27:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4819 transitions. [2021-11-23 03:27:57,959 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4819 transitions. Word has length 256 [2021-11-23 03:27:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:57,960 INFO L470 AbstractCegarLoop]: Abstraction has 3437 states and 4819 transitions. [2021-11-23 03:27:57,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 03:27:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4819 transitions. [2021-11-23 03:27:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-23 03:27:57,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:57,973 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:57,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:27:57,973 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:27:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1942638549, now seen corresponding path program 1 times [2021-11-23 03:27:57,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:27:57,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445761786] [2021-11-23 03:27:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:57,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:27:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2021-11-23 03:27:58,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:27:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445761786] [2021-11-23 03:27:58,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445761786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:58,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:58,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:27:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443919611] [2021-11-23 03:27:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:58,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:27:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:27:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:27:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:27:58,315 INFO L87 Difference]: Start difference. First operand 3437 states and 4819 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 03:27:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:58,773 INFO L93 Difference]: Finished difference Result 6738 states and 9428 transitions. [2021-11-23 03:27:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:27:58,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 262 [2021-11-23 03:27:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:58,805 INFO L225 Difference]: With dead ends: 6738 [2021-11-23 03:27:58,805 INFO L226 Difference]: Without dead ends: 3365 [2021-11-23 03:27:58,822 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 03:27:58,827 INFO L933 BasicCegarLoop]: 1189 mSDtfsCounter, 1306 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:58,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 1189 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:27:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-11-23 03:27:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3365. [2021-11-23 03:27:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 2033 states have (on average 1.3108706345302508) internal successors, (2665), 2089 states have internal predecessors, (2665), 1001 states have call successors, (1001), 331 states have call predecessors, (1001), 330 states have return successors, (1029), 991 states have call predecessors, (1029), 999 states have call successors, (1029) [2021-11-23 03:27:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 4695 transitions. [2021-11-23 03:27:59,098 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 4695 transitions. Word has length 262 [2021-11-23 03:27:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:59,101 INFO L470 AbstractCegarLoop]: Abstraction has 3365 states and 4695 transitions. [2021-11-23 03:27:59,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 03:27:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 4695 transitions. [2021-11-23 03:27:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-23 03:27:59,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:59,115 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:59,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:27:59,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:27:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:59,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1055216131, now seen corresponding path program 1 times [2021-11-23 03:27:59,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:27:59,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057417401] [2021-11-23 03:27:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:59,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:27:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2021-11-23 03:27:59,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:27:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057417401] [2021-11-23 03:27:59,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057417401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:27:59,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564063812] [2021-11-23 03:27:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:59,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:27:59,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:27:59,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:27:59,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:28:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 3376 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-23 03:28:00,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:00,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564063812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:00,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:00,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-23 03:28:00,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731646462] [2021-11-23 03:28:00,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:00,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:00,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:28:00,913 INFO L87 Difference]: Start difference. First operand 3365 states and 4695 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 03:28:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:01,451 INFO L93 Difference]: Finished difference Result 6594 states and 9188 transitions. [2021-11-23 03:28:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 259 [2021-11-23 03:28:01,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:01,491 INFO L225 Difference]: With dead ends: 6594 [2021-11-23 03:28:01,491 INFO L226 Difference]: Without dead ends: 3293 [2021-11-23 03:28:01,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 259 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 03:28:01,515 INFO L933 BasicCegarLoop]: 1144 mSDtfsCounter, 1263 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:01,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 1144 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:28:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-11-23 03:28:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3293. [2021-11-23 03:28:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 1997 states have (on average 1.2984476715072608) internal successors, (2593), 2053 states have internal predecessors, (2593), 965 states have call successors, (965), 331 states have call predecessors, (965), 330 states have return successors, (989), 955 states have call predecessors, (989), 963 states have call successors, (989) [2021-11-23 03:28:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4547 transitions. [2021-11-23 03:28:01,802 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4547 transitions. Word has length 259 [2021-11-23 03:28:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:01,803 INFO L470 AbstractCegarLoop]: Abstraction has 3293 states and 4547 transitions. [2021-11-23 03:28:01,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 03:28:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4547 transitions. [2021-11-23 03:28:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-23 03:28:01,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:01,816 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:01,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:02,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:02,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash 752384732, now seen corresponding path program 1 times [2021-11-23 03:28:02,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348856099] [2021-11-23 03:28:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:02,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2021-11-23 03:28:02,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:02,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348856099] [2021-11-23 03:28:02,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348856099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:02,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:28:02,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:28:02,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309438867] [2021-11-23 03:28:02,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:02,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:02,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:28:02,375 INFO L87 Difference]: Start difference. First operand 3293 states and 4547 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 03:28:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:02,846 INFO L93 Difference]: Finished difference Result 5160 states and 7099 transitions. [2021-11-23 03:28:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:02,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 338 [2021-11-23 03:28:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:02,863 INFO L225 Difference]: With dead ends: 5160 [2021-11-23 03:28:02,864 INFO L226 Difference]: Without dead ends: 1931 [2021-11-23 03:28:02,883 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 03:28:02,884 INFO L933 BasicCegarLoop]: 1171 mSDtfsCounter, 182 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:02,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 2213 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:28:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-11-23 03:28:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1907. [2021-11-23 03:28:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1186 states have (on average 1.3010118043844856) internal successors, (1543), 1217 states have internal predecessors, (1543), 529 states have call successors, (529), 192 states have call predecessors, (529), 191 states have return successors, (540), 522 states have call predecessors, (540), 527 states have call successors, (540) [2021-11-23 03:28:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 2612 transitions. [2021-11-23 03:28:02,994 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 2612 transitions. Word has length 338 [2021-11-23 03:28:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 2612 transitions. [2021-11-23 03:28:03,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 03:28:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 2612 transitions. [2021-11-23 03:28:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-23 03:28:03,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:03,026 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:03,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:28:03,027 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 363225700, now seen corresponding path program 1 times [2021-11-23 03:28:03,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:03,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230342374] [2021-11-23 03:28:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:03,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2021-11-23 03:28:03,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:03,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230342374] [2021-11-23 03:28:03,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230342374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:03,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:28:03,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:28:03,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835058297] [2021-11-23 03:28:03,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:03,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:03,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:28:03,368 INFO L87 Difference]: Start difference. First operand 1907 states and 2612 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-23 03:28:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:03,925 INFO L93 Difference]: Finished difference Result 4760 states and 6487 transitions. [2021-11-23 03:28:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 389 [2021-11-23 03:28:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:03,948 INFO L225 Difference]: With dead ends: 4760 [2021-11-23 03:28:03,948 INFO L226 Difference]: Without dead ends: 2954 [2021-11-23 03:28:03,957 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 03:28:03,958 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 748 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:03,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 2487 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:28:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-11-23 03:28:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2928. [2021-11-23 03:28:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 1813 states have (on average 1.2945394373965802) internal successors, (2347), 1862 states have internal predecessors, (2347), 805 states have call successors, (805), 310 states have call predecessors, (805), 309 states have return successors, (816), 793 states have call predecessors, (816), 803 states have call successors, (816) [2021-11-23 03:28:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 3968 transitions. [2021-11-23 03:28:04,122 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 3968 transitions. Word has length 389 [2021-11-23 03:28:04,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:04,124 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 3968 transitions. [2021-11-23 03:28:04,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-23 03:28:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 3968 transitions. [2021-11-23 03:28:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-23 03:28:04,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:04,138 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:04,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:28:04,138 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1684929176, now seen corresponding path program 1 times [2021-11-23 03:28:04,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:04,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531475455] [2021-11-23 03:28:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:04,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-23 03:28:04,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:04,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531475455] [2021-11-23 03:28:04,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531475455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:04,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:28:04,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:28:04,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734706689] [2021-11-23 03:28:04,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:04,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:04,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:28:04,423 INFO L87 Difference]: Start difference. First operand 2928 states and 3968 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-23 03:28:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:04,971 INFO L93 Difference]: Finished difference Result 5783 states and 8036 transitions. [2021-11-23 03:28:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 322 [2021-11-23 03:28:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:04,995 INFO L225 Difference]: With dead ends: 5783 [2021-11-23 03:28:04,995 INFO L226 Difference]: Without dead ends: 2956 [2021-11-23 03:28:05,007 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 03:28:05,008 INFO L933 BasicCegarLoop]: 1157 mSDtfsCounter, 2 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2304 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:05,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2304 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:28:05,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-11-23 03:28:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2940. [2021-11-23 03:28:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 1821 states have (on average 1.2932454695222406) internal successors, (2355), 1870 states have internal predecessors, (2355), 809 states have call successors, (809), 310 states have call predecessors, (809), 309 states have return successors, (820), 797 states have call predecessors, (820), 807 states have call successors, (820) [2021-11-23 03:28:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 3984 transitions. [2021-11-23 03:28:05,179 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 3984 transitions. Word has length 322 [2021-11-23 03:28:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:05,180 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 3984 transitions. [2021-11-23 03:28:05,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-23 03:28:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 3984 transitions. [2021-11-23 03:28:05,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-23 03:28:05,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:05,195 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:05,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:28:05,196 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash 289762776, now seen corresponding path program 1 times [2021-11-23 03:28:05,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:05,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157878337] [2021-11-23 03:28:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:05,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2021-11-23 03:28:05,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:05,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157878337] [2021-11-23 03:28:05,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157878337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:05,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283981884] [2021-11-23 03:28:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:05,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:05,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:05,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:05,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:28:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:07,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 4269 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:28:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2021-11-23 03:28:07,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:07,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283981884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:07,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:07,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 03:28:07,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193772444] [2021-11-23 03:28:07,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:07,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:28:07,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:28:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:07,837 INFO L87 Difference]: Start difference. First operand 2940 states and 3984 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 03:28:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:08,441 INFO L93 Difference]: Finished difference Result 5791 states and 7840 transitions. [2021-11-23 03:28:08,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:28:08,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 392 [2021-11-23 03:28:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:08,467 INFO L225 Difference]: With dead ends: 5791 [2021-11-23 03:28:08,468 INFO L226 Difference]: Without dead ends: 2950 [2021-11-23 03:28:08,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:28:08,482 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 11 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3468 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:08,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3468 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:28:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-11-23 03:28:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2942. [2021-11-23 03:28:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 1823 states have (on average 1.292375205704882) internal successors, (2356), 1872 states have internal predecessors, (2356), 809 states have call successors, (809), 310 states have call predecessors, (809), 309 states have return successors, (820), 797 states have call predecessors, (820), 807 states have call successors, (820) [2021-11-23 03:28:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 3985 transitions. [2021-11-23 03:28:08,665 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 3985 transitions. Word has length 392 [2021-11-23 03:28:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:08,666 INFO L470 AbstractCegarLoop]: Abstraction has 2942 states and 3985 transitions. [2021-11-23 03:28:08,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 03:28:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 3985 transitions. [2021-11-23 03:28:08,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-23 03:28:08,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:08,683 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:08,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:08,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:08,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:08,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1902057365, now seen corresponding path program 1 times [2021-11-23 03:28:08,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:08,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700663214] [2021-11-23 03:28:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:08,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-23 03:28:09,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700663214] [2021-11-23 03:28:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700663214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133485341] [2021-11-23 03:28:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:09,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:09,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:09,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:09,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:28:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 4609 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 03:28:10,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2021-11-23 03:28:11,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:11,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133485341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:11,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:11,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2021-11-23 03:28:11,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951210628] [2021-11-23 03:28:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:11,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:28:11,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:11,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:28:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:28:11,589 INFO L87 Difference]: Start difference. First operand 2942 states and 3985 transitions. Second operand has 7 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 2 states have call successors, (64), 2 states have call predecessors, (64), 3 states have return successors, (57), 3 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-23 03:28:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:12,785 INFO L93 Difference]: Finished difference Result 5803 states and 8052 transitions. [2021-11-23 03:28:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:28:12,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 2 states have call successors, (64), 2 states have call predecessors, (64), 3 states have return successors, (57), 3 states have call predecessors, (57), 2 states have call successors, (57) Word has length 437 [2021-11-23 03:28:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:12,809 INFO L225 Difference]: With dead ends: 5803 [2021-11-23 03:28:12,809 INFO L226 Difference]: Without dead ends: 2962 [2021-11-23 03:28:12,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:28:12,823 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 18 mSDsluCounter, 6168 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6687 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:12,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 6687 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:28:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2021-11-23 03:28:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2950. [2021-11-23 03:28:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 1831 states have (on average 1.2910977607864556) internal successors, (2364), 1880 states have internal predecessors, (2364), 809 states have call successors, (809), 310 states have call predecessors, (809), 309 states have return successors, (820), 797 states have call predecessors, (820), 807 states have call successors, (820) [2021-11-23 03:28:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 3993 transitions. [2021-11-23 03:28:12,979 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 3993 transitions. Word has length 437 [2021-11-23 03:28:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:12,980 INFO L470 AbstractCegarLoop]: Abstraction has 2950 states and 3993 transitions. [2021-11-23 03:28:12,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 2 states have call successors, (64), 2 states have call predecessors, (64), 3 states have return successors, (57), 3 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-23 03:28:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 3993 transitions. [2021-11-23 03:28:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-23 03:28:12,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:12,991 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:13,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:13,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:13,218 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1036629186, now seen corresponding path program 1 times [2021-11-23 03:28:13,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:13,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971992142] [2021-11-23 03:28:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:13,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2021-11-23 03:28:14,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971992142] [2021-11-23 03:28:14,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971992142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954356612] [2021-11-23 03:28:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:14,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:14,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:14,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac31da0-188c-4b0e-ac39-fb3579ad485a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:28:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 4661 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 03:28:15,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 1387 trivial. 0 not checked. [2021-11-23 03:28:16,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:28:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 1387 trivial. 0 not checked. [2021-11-23 03:28:18,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954356612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:28:18,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986931579] [2021-11-23 03:28:18,034 INFO L159 IcfgInterpreter]: Started Sifa with 215 locations of interest [2021-11-23 03:28:18,034 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:28:18,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:28:18,046 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:28:18,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:28:20,519 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 7 treesize of output 6 [2021-11-23 03:28:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:21,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:22,859 INFO L244 Elim1Store]: Index analysis took 1721 ms [2021-11-23 03:39:17,501 WARN L227 SmtUtils]: Spent 10.91m on a formula simplification. DAG size of input: 7388 DAG size of output: 2857 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:39:17,520 INFO L354 Elim1Store]: treesize reduction 53589, result has 9.2 percent of original size [2021-11-23 03:39:17,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 96 select indices, 96 select index equivalence classes, 3192 disjoint index pairs (out of 4560 index pairs), introduced 96 new quantified variables, introduced 1476 case distinctions, treesize of input 1012 treesize of output 6241 [2021-11-23 03:39:28,661 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 7 treesize of output 6 [2021-11-23 03:39:29,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 252 [2021-11-23 03:39:31,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 79 select indices, 79 select index equivalence classes, 4481 disjoint index pairs (out of 3081 index pairs), introduced 79 new quantified variables, introduced 0 case distinctions, treesize of input 447 treesize of output 713