./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--net--xen-netback--xen-netback.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF --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 f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:35,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:35,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:35,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:35,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:35,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:35,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:35,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:35,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:35,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:35,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:35,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:35,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:35,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:35,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:35,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:35,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:35,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:35,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:35,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:35,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:35,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:35,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:35,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:35,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:35,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:35,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:35,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:35,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:35,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:35,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:35,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:35,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:35,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:35,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:35,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:35,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:35,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:35,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:35,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:35,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:35,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:49:35,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:35,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:35,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:35,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:35,513 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:35,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:35,514 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:35,514 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:49:35,515 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:35,515 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:35,515 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:49:35,515 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:49:35,515 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:35,516 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:49:35,516 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:49:35,516 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:49:35,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:35,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:49:35,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:35,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:35,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:35,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:35,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:35,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:35,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:35,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:35,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:35,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:35,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:35,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:35,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:35,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:35,520 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:49:35,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:49:35,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:35,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:35,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:35,521 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_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 [2021-11-12 22:49:35,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:35,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:35,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:35,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:35,807 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:35,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-12 22:49:35,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/8a0401456/94c5bb90f17f4852b01a55458d95a73e/FLAG57910af5d [2021-11-12 22:49:36,827 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:36,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-12 22:49:36,872 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/8a0401456/94c5bb90f17f4852b01a55458d95a73e/FLAG57910af5d [2021-11-12 22:49:37,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/8a0401456/94c5bb90f17f4852b01a55458d95a73e [2021-11-12 22:49:37,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:37,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:37,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:37,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:37,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:37,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:37" (1/1) ... [2021-11-12 22:49:37,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18dce955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:37, skipping insertion in model container [2021-11-12 22:49:37,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:37" (1/1) ... [2021-11-12 22:49:37,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:37,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:39,001 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,074 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,080 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,086 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,097 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,336 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,465 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,466 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,474 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,474 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,475 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,476 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,478 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,480 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,483 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,484 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,485 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,584 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,596 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,603 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,608 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,626 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,638 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,638 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,640 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,647 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,648 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,666 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,668 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,668 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,717 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,717 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,718 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,718 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,719 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,727 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,734 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,734 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,734 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,739 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,740 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,740 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,747 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,748 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,748 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,752 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,753 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,754 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,755 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,757 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,824 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,825 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,872 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:39,881 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,248 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,260 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,260 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,292 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,299 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,316 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,345 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,385 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,410 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,411 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,411 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,412 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,412 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,415 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,415 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,700 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,700 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,706 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,718 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,726 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,739 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,756 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,763 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,768 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,774 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,789 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,790 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,800 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,800 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,802 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,846 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,847 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,847 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,848 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,849 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:49:40,859 WARN L228 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_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-12 22:49:40,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:40,975 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:49:40,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c5fd459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:40, skipping insertion in model container [2021-11-12 22:49:40,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:40,977 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:49:40,980 INFO L158 Benchmark]: Toolchain (without parser) took 3715.90ms. Allocated memory was 121.6MB in the beginning and 186.6MB in the end (delta: 65.0MB). Free memory was 85.1MB in the beginning and 121.4MB in the end (delta: -36.3MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. [2021-11-12 22:49:40,981 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory was 62.9MB in the beginning and 62.8MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:49:40,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3709.95ms. Allocated memory was 121.6MB in the beginning and 186.6MB in the end (delta: 65.0MB). Free memory was 85.1MB in the beginning and 121.4MB in the end (delta: -36.3MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. [2021-11-12 22:49:40,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory was 62.9MB in the beginning and 62.8MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3709.95ms. Allocated memory was 121.6MB in the beginning and 186.6MB in the end (delta: 65.0MB). Free memory was 85.1MB in the beginning and 121.4MB in the end (delta: -36.3MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6959]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF --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 f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:43,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:43,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:43,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:43,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:43,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:43,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:43,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:43,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:43,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:43,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:43,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:43,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:43,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:43,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:43,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:43,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:43,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:43,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:43,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:43,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:43,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:43,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:43,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:43,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:43,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:43,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:43,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:43,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:43,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:43,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:43,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:43,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:43,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:43,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:43,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:43,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:43,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:43,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:43,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:43,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:43,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:49:43,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:43,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:43,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:43,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:43,376 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:43,376 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:43,377 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:43,377 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:43,377 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:43,377 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:43,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:43,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:43,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:43,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:43,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:43,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:43,380 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:49:43,380 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:49:43,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:43,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:43,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:43,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:43,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:49:43,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:43,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:43,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:43,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:43,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:43,382 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:49:43,383 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:49:43,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:43,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:43,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:43,383 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 [2021-11-12 22:49:43,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:43,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:43,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:43,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:43,770 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:43,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-12 22:49:43,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/4890fdc8f/e4ceecabcde14ab2a8e98ae4a847ed5a/FLAG6d03a11ff [2021-11-12 22:49:44,941 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:44,941 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-12 22:49:45,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/4890fdc8f/e4ceecabcde14ab2a8e98ae4a847ed5a/FLAG6d03a11ff [2021-11-12 22:49:45,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/data/4890fdc8f/e4ceecabcde14ab2a8e98ae4a847ed5a [2021-11-12 22:49:45,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:45,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:45,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:45,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:45,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:45,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:45" (1/1) ... [2021-11-12 22:49:45,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34538eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:45, skipping insertion in model container [2021-11-12 22:49:45,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:45" (1/1) ... [2021-11-12 22:49:45,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:45,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:49,230 WARN L228 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_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-12 22:49:49,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:49,403 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:49:49,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:49,986 WARN L228 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_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-12 22:49:49,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:50,030 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:49:51,020 WARN L228 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_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-12 22:49:51,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:51,350 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:49:51,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51 WrapperNode [2021-11-12 22:49:51,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:51,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:51,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:49:51,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:49:51,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:51,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:49:51,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:49:51,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:49:51,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:52,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:49:52,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:49:52,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:49:52,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:49:52,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:52,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:52,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:49:52,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:49:52,093 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-12 22:49:52,093 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_wake_queue [2021-11-12 22:49:52,093 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_wake_queue [2021-11-12 22:49:52,093 INFO L130 BoogieDeclarations]: Found specification of procedure backend_switch_state [2021-11-12 22:49:52,094 INFO L138 BoogieDeclarations]: Found implementation of procedure backend_switch_state [2021-11-12 22:49:52,094 INFO L130 BoogieDeclarations]: Found specification of procedure wake_up_process [2021-11-12 22:49:52,094 INFO L138 BoogieDeclarations]: Found implementation of procedure wake_up_process [2021-11-12 22:49:52,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 22:49:52,094 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 22:49:52,094 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_hotplug_status_watch [2021-11-12 22:49:52,095 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_hotplug_status_watch [2021-11-12 22:49:52,095 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2021-11-12 22:49:52,095 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2021-11-12 22:49:52,095 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_unmap_frontend_rings [2021-11-12 22:49:52,095 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_unmap_frontend_rings [2021-11-12 22:49:52,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:49:52,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:49:52,096 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_xenbus_watch [2021-11-12 22:49:52,096 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_xenbus_watch [2021-11-12 22:49:52,096 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_kick_thread [2021-11-12 22:49:52,096 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_kick_thread [2021-11-12 22:49:52,096 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-12 22:49:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-12 22:49:52,097 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_map_ring_valloc [2021-11-12 22:49:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_map_ring_valloc [2021-11-12 22:49:52,097 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 22:49:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 22:49:52,097 INFO L130 BoogieDeclarations]: Found specification of procedure xen_net_read_rate [2021-11-12 22:49:52,098 INFO L138 BoogieDeclarations]: Found implementation of procedure xen_net_read_rate [2021-11-12 22:49:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-12 22:49:52,098 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-12 22:49:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 22:49:52,098 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 22:49:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 22:49:52,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 22:49:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure netback_uevent [2021-11-12 22:49:52,099 INFO L138 BoogieDeclarations]: Found implementation of procedure netback_uevent [2021-11-12 22:49:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 22:49:52,100 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 22:49:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_carrier_off [2021-11-12 22:49:52,100 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_carrier_off [2021-11-12 22:49:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:49:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:49:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:49:52,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:49:52,101 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_dir [2021-11-12 22:49:52,101 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_dir [2021-11-12 22:49:52,101 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 22:49:52,102 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 22:49:52,102 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 22:49:52,102 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 22:49:52,102 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2021-11-12 22:49:52,103 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2021-11-12 22:49:52,104 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-12 22:49:52,104 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-12 22:49:52,104 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 22:49:52,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 22:49:52,105 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_switch_state [2021-11-12 22:49:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_switch_state [2021-11-12 22:49:52,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 22:49:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 22:49:52,105 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_deinit_queue [2021-11-12 22:49:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_deinit_queue [2021-11-12 22:49:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_remove_recursive [2021-11-12 22:49:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_remove_recursive [2021-11-12 22:49:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_to_xenbus_device [2021-11-12 22:49:52,107 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_to_xenbus_device [2021-11-12 22:49:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure xen_unregister_watchers [2021-11-12 22:49:52,107 INFO L138 BoogieDeclarations]: Found implementation of procedure xen_unregister_watchers [2021-11-12 22:49:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-12 22:49:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-12 22:49:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 22:49:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 22:49:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure frontend_changed [2021-11-12 22:49:52,109 INFO L138 BoogieDeclarations]: Found implementation of procedure frontend_changed [2021-11-12 22:49:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:49:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure set_backend_state [2021-11-12 22:49:52,109 INFO L138 BoogieDeclarations]: Found implementation of procedure set_backend_state [2021-11-12 22:49:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:49:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:49:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_write_io_ring [2021-11-12 22:49:52,110 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_write_io_ring [2021-11-12 22:49:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:49:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-11-12 22:49:52,110 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-11-12 22:49:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure kthread_stop [2021-11-12 22:49:52,111 INFO L138 BoogieDeclarations]: Found implementation of procedure kthread_stop [2021-11-12 22:49:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:49:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_strstate [2021-11-12 22:49:52,112 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_strstate [2021-11-12 22:49:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-12 22:49:52,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-12 22:49:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 22:49:52,113 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 22:49:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:49:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:49:52,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:49:52,115 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 22:49:52,115 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 22:49:52,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:49:52,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:49:52,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:49:52,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:49:52,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:49:52,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:49:52,116 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_disconnect [2021-11-12 22:49:52,116 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_disconnect [2021-11-12 22:49:52,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:49:52,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:49:52,117 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2021-11-12 22:49:52,117 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2021-11-12 22:49:52,117 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_down [2021-11-12 22:49:52,118 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_down [2021-11-12 22:49:52,118 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-12 22:49:52,121 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-12 22:49:52,121 INFO L130 BoogieDeclarations]: Found specification of procedure bind_interdomain_evtchn_to_irqhandler [2021-11-12 22:49:52,121 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_interdomain_evtchn_to_irqhandler [2021-11-12 22:49:52,121 INFO L130 BoogieDeclarations]: Found specification of procedure kobject_uevent [2021-11-12 22:49:52,123 INFO L138 BoogieDeclarations]: Found implementation of procedure kobject_uevent [2021-11-12 22:49:52,124 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-12 22:49:52,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-12 22:49:52,124 INFO L130 BoogieDeclarations]: Found specification of procedure disable_irq [2021-11-12 22:49:52,124 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_irq [2021-11-12 22:49:52,131 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-12 22:49:52,131 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-12 22:49:52,131 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_fix_features [2021-11-12 22:49:52,132 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_fix_features [2021-11-12 22:49:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2021-11-12 22:49:52,132 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2021-11-12 22:49:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 22:49:52,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 22:49:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:49:52,132 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:49:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:49:52,133 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:49:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR_OR_NULL [2021-11-12 22:49:52,133 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR_OR_NULL [2021-11-12 22:49:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-12 22:49:52,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-12 22:49:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_up [2021-11-12 22:49:52,134 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_up [2021-11-12 22:49:52,134 INFO L130 BoogieDeclarations]: Found specification of procedure get_jiffies_64 [2021-11-12 22:49:52,134 INFO L138 BoogieDeclarations]: Found implementation of procedure get_jiffies_64 [2021-11-12 22:49:52,134 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 22:49:52,134 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 22:49:52,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:49:52,134 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-12 22:49:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-12 22:49:52,135 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_unmap_ring_vfree [2021-11-12 22:49:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_unmap_ring_vfree [2021-11-12 22:49:52,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:49:52,135 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_change_mtu [2021-11-12 22:49:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_change_mtu [2021-11-12 22:49:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_tail [2021-11-12 22:49:52,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_tail [2021-11-12 22:49:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_read [2021-11-12 22:49:52,136 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_read [2021-11-12 22:49:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:49:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:49:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:49:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-12 22:49:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-12 22:49:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:49:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:49:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-12 22:49:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-12 22:49:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-12 22:49:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-12 22:49:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 22:49:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 22:49:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2021-11-12 22:49:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2021-11-12 22:49:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 22:49:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 22:49:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure netback_remove [2021-11-12 22:49:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure netback_remove [2021-11-12 22:49:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 22:49:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 22:49:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 22:49:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 22:49:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:49:52,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:49:52,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:49:52,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:49:52,140 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:49:52,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:49:52,140 INFO L130 BoogieDeclarations]: Found specification of procedure enable_irq [2021-11-12 22:49:52,140 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_irq [2021-11-12 22:49:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_napi_schedule_or_enable_events [2021-11-12 22:49:52,141 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_napi_schedule_or_enable_events [2021-11-12 22:49:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 22:49:52,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 22:49:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-12 22:49:52,141 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-12 22:49:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-12 22:49:52,142 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-12 22:49:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-12 22:49:52,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-12 22:49:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-12 22:49:52,142 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-12 22:49:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-12 22:49:52,143 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-12 22:49:52,143 INFO L130 BoogieDeclarations]: Found specification of procedure xenvif_get_stats [2021-11-12 22:49:52,143 INFO L138 BoogieDeclarations]: Found implementation of procedure xenvif_get_stats [2021-11-12 22:49:53,977 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:50:59,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:50:59,158 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:50:59,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:50:59 BoogieIcfgContainer [2021-11-12 22:50:59,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:50:59,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:50:59,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:50:59,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:50:59,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:49:45" (1/3) ... [2021-11-12 22:50:59,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc927d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:50:59, skipping insertion in model container [2021-11-12 22:50:59,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51" (2/3) ... [2021-11-12 22:50:59,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc927d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:50:59, skipping insertion in model container [2021-11-12 22:50:59,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:50:59" (3/3) ... [2021-11-12 22:50:59,170 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-12 22:50:59,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:50:59,176 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:50:59,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:50:59,242 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 [2021-11-12 22:50:59,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:50:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 1307 states, 948 states have (on average 1.3206751054852321) internal successors, (1252), 974 states have internal predecessors, (1252), 271 states have call successors, (271), 87 states have call predecessors, (271), 86 states have return successors, (265), 258 states have call predecessors, (265), 265 states have call successors, (265) [2021-11-12 22:50:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 22:50:59,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:59,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:59,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1510187125, now seen corresponding path program 1 times [2021-11-12 22:50:59,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:59,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442260175] [2021-11-12 22:50:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:59,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:59,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:59,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:59,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:51:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:06,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:51:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:06,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:06,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:06,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442260175] [2021-11-12 22:51:06,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442260175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:06,450 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:06,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:51:06,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469860009] [2021-11-12 22:51:06,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:06,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:51:06,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:51:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:51:06,495 INFO L87 Difference]: Start difference. First operand has 1307 states, 948 states have (on average 1.3206751054852321) internal successors, (1252), 974 states have internal predecessors, (1252), 271 states have call successors, (271), 87 states have call predecessors, (271), 86 states have return successors, (265), 258 states have call predecessors, (265), 265 states have call successors, (265) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:06,862 INFO L93 Difference]: Finished difference Result 3905 states and 5464 transitions. [2021-11-12 22:51:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:51:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-12 22:51:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:06,914 INFO L225 Difference]: With dead ends: 3905 [2021-11-12 22:51:06,914 INFO L226 Difference]: Without dead ends: 2553 [2021-11-12 22:51:06,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:51:06,943 INFO L933 BasicCegarLoop]: 2044 mSDtfsCounter, 1761 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 3814 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.46ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:06,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1761 Valid, 3814 Invalid, 10 Unknown, 0 Unchecked, 48.46ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 43.21ms Time] [2021-11-12 22:51:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-11-12 22:51:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2550. [2021-11-12 22:51:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 1853 states have (on average 1.3038316243928765) internal successors, (2416), 1887 states have internal predecessors, (2416), 526 states have call successors, (526), 171 states have call predecessors, (526), 170 states have return successors, (524), 510 states have call predecessors, (524), 524 states have call successors, (524) [2021-11-12 22:51:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3466 transitions. [2021-11-12 22:51:07,209 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3466 transitions. Word has length 19 [2021-11-12 22:51:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:07,210 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 3466 transitions. [2021-11-12 22:51:07,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3466 transitions. [2021-11-12 22:51:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:51:07,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:07,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:07,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:07,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:07,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1054431279, now seen corresponding path program 1 times [2021-11-12 22:51:07,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:07,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052430335] [2021-11-12 22:51:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:07,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:07,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:07,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:51:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:51:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:51:15,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:51:15,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:15,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052430335] [2021-11-12 22:51:15,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052430335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:15,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:15,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:51:15,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688029893] [2021-11-12 22:51:15,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:15,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:51:15,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:51:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:51:15,465 INFO L87 Difference]: Start difference. First operand 2550 states and 3466 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:51:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:16,233 INFO L93 Difference]: Finished difference Result 6119 states and 8301 transitions. [2021-11-12 22:51:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:51:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 106 [2021-11-12 22:51:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:16,261 INFO L225 Difference]: With dead ends: 6119 [2021-11-12 22:51:16,261 INFO L226 Difference]: Without dead ends: 3572 [2021-11-12 22:51:16,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:51:16,278 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 693 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 510.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.36ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 585.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:16,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 3572 Invalid, 23 Unknown, 0 Unchecked, 12.36ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 585.24ms Time] [2021-11-12 22:51:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-11-12 22:51:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 3560. [2021-11-12 22:51:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 2610 states have (on average 1.3114942528735631) internal successors, (3423), 2655 states have internal predecessors, (3423), 702 states have call successors, (702), 248 states have call predecessors, (702), 247 states have return successors, (700), 683 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-12 22:51:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 4825 transitions. [2021-11-12 22:51:16,470 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 4825 transitions. Word has length 106 [2021-11-12 22:51:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:16,470 INFO L470 AbstractCegarLoop]: Abstraction has 3560 states and 4825 transitions. [2021-11-12 22:51:16,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:51:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 4825 transitions. [2021-11-12 22:51:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 22:51:16,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:16,488 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:51:16,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:16,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 772852535, now seen corresponding path program 1 times [2021-11-12 22:51:16,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:16,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992705155] [2021-11-12 22:51:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:16,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:16,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:16,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:16,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:51:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:51:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 22:51:25,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 22:51:25,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:25,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992705155] [2021-11-12 22:51:25,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992705155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:25,716 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:25,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:51:25,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041509275] [2021-11-12 22:51:25,717 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:25,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:25,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:51:25,719 INFO L87 Difference]: Start difference. First operand 3560 states and 4825 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:51:28,079 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:28,508 INFO L93 Difference]: Finished difference Result 7141 states and 9676 transitions. [2021-11-12 22:51:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:51:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 185 [2021-11-12 22:51:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:28,536 INFO L225 Difference]: With dead ends: 7141 [2021-11-12 22:51:28,536 INFO L226 Difference]: Without dead ends: 3576 [2021-11-12 22:51:28,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:51:28,559 INFO L933 BasicCegarLoop]: 1743 mSDtfsCounter, 15 mSDsluCounter, 6965 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2456.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8708 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.61ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2554.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:28,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8708 Invalid, 28 Unknown, 0 Unchecked, 17.61ms Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 1 Unknown, 0 Unchecked, 2554.77ms Time] [2021-11-12 22:51:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-11-12 22:51:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3561. [2021-11-12 22:51:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 2611 states have (on average 1.3094599770202988) internal successors, (3419), 2656 states have internal predecessors, (3419), 702 states have call successors, (702), 248 states have call predecessors, (702), 247 states have return successors, (700), 683 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-12 22:51:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4821 transitions. [2021-11-12 22:51:28,729 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 4821 transitions. Word has length 185 [2021-11-12 22:51:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:28,731 INFO L470 AbstractCegarLoop]: Abstraction has 3561 states and 4821 transitions. [2021-11-12 22:51:28,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:51:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 4821 transitions. [2021-11-12 22:51:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:51:28,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:28,742 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:51:28,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:28,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:28,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1258493088, now seen corresponding path program 1 times [2021-11-12 22:51:28,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:28,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197393871] [2021-11-12 22:51:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:28,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:28,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:28,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:51:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:36,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2276 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:51:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 22:51:37,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 22:51:37,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:37,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197393871] [2021-11-12 22:51:37,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197393871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:37,902 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:37,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 22:51:37,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460605615] [2021-11-12 22:51:37,903 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:37,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:51:37,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:51:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:51:37,905 INFO L87 Difference]: Start difference. First operand 3561 states and 4821 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:51:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:38,092 INFO L93 Difference]: Finished difference Result 7119 states and 9639 transitions. [2021-11-12 22:51:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:51:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 194 [2021-11-12 22:51:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:38,118 INFO L225 Difference]: With dead ends: 7119 [2021-11-12 22:51:38,118 INFO L226 Difference]: Without dead ends: 3561 [2021-11-12 22:51:38,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:51:38,136 INFO L933 BasicCegarLoop]: 1743 mSDtfsCounter, 1729 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:38,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 1743 Invalid, 1 Unknown, 0 Unchecked, 7.36ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 5.93ms Time] [2021-11-12 22:51:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-11-12 22:51:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 3561. [2021-11-12 22:51:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 2611 states have (on average 1.3079279969360398) internal successors, (3415), 2656 states have internal predecessors, (3415), 702 states have call successors, (702), 248 states have call predecessors, (702), 247 states have return successors, (700), 683 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-12 22:51:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4817 transitions. [2021-11-12 22:51:38,325 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 4817 transitions. Word has length 194 [2021-11-12 22:51:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:38,325 INFO L470 AbstractCegarLoop]: Abstraction has 3561 states and 4817 transitions. [2021-11-12 22:51:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:51:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 4817 transitions. [2021-11-12 22:51:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:51:38,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:38,335 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:51:38,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:38,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:38,549 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash 442445858, now seen corresponding path program 1 times [2021-11-12 22:51:38,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:38,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588151530] [2021-11-12 22:51:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:38,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:38,556 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:38,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:51:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 2275 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:45,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:51:47,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 22:51:47,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:47,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588151530] [2021-11-12 22:51:47,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588151530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:47,597 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:47,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:51:47,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99721893] [2021-11-12 22:51:47,597 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:47,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:51:47,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:51:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:51:47,599 INFO L87 Difference]: Start difference. First operand 3561 states and 4817 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-12 22:51:50,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:50,547 INFO L93 Difference]: Finished difference Result 7140 states and 9653 transitions. [2021-11-12 22:51:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:51:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 194 [2021-11-12 22:51:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:50,579 INFO L225 Difference]: With dead ends: 7140 [2021-11-12 22:51:50,580 INFO L226 Difference]: Without dead ends: 3576 [2021-11-12 22:51:50,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:51:50,597 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 21 mSDsluCounter, 5218 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2518.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6962 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.13ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2622.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:50,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 6962 Invalid, 26 Unknown, 0 Unchecked, 14.13ms Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 1 Unknown, 0 Unchecked, 2622.63ms Time] [2021-11-12 22:51:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-11-12 22:51:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3558. [2021-11-12 22:51:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 2608 states have (on average 1.3075153374233128) internal successors, (3410), 2653 states have internal predecessors, (3410), 702 states have call successors, (702), 248 states have call predecessors, (702), 247 states have return successors, (700), 683 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-12 22:51:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 4812 transitions. [2021-11-12 22:51:50,800 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 4812 transitions. Word has length 194 [2021-11-12 22:51:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:50,801 INFO L470 AbstractCegarLoop]: Abstraction has 3558 states and 4812 transitions. [2021-11-12 22:51:50,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-12 22:51:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 4812 transitions. [2021-11-12 22:51:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-12 22:51:50,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:50,812 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:51:50,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:51,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:51,033 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1488410957, now seen corresponding path program 1 times [2021-11-12 22:51:51,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:51,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082021872] [2021-11-12 22:51:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:51,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:51,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:51,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:51,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:51:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:51:58,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 22:51:59,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 22:52:00,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:00,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082021872] [2021-11-12 22:52:00,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082021872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:00,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:00,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 22:52:00,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343659283] [2021-11-12 22:52:00,404 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:00,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:52:00,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:00,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:52:00,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:00,406 INFO L87 Difference]: Start difference. First operand 3558 states and 4812 transitions. Second operand has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 10 states have internal predecessors, (146), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-12 22:52:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:02,162 INFO L93 Difference]: Finished difference Result 9747 states and 13741 transitions. [2021-11-12 22:52:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:52:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 10 states have internal predecessors, (146), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 2 states have call successors, (38) Word has length 214 [2021-11-12 22:52:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:02,205 INFO L225 Difference]: With dead ends: 9747 [2021-11-12 22:52:02,206 INFO L226 Difference]: Without dead ends: 6192 [2021-11-12 22:52:02,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:52:02,222 INFO L933 BasicCegarLoop]: 2349 mSDtfsCounter, 1300 mSDsluCounter, 18674 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1080.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 21023 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.26ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1191.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:02,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 21023 Invalid, 246 Unknown, 0 Unchecked, 49.26ms Time], IncrementalHoareTripleChecker [102 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 1191.48ms Time] [2021-11-12 22:52:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2021-11-12 22:52:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 3582. [2021-11-12 22:52:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 2628 states have (on average 1.3051750380517504) internal successors, (3430), 2673 states have internal predecessors, (3430), 702 states have call successors, (702), 248 states have call predecessors, (702), 251 states have return successors, (716), 687 states have call predecessors, (716), 700 states have call successors, (716) [2021-11-12 22:52:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 4848 transitions. [2021-11-12 22:52:02,473 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 4848 transitions. Word has length 214 [2021-11-12 22:52:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:02,474 INFO L470 AbstractCegarLoop]: Abstraction has 3582 states and 4848 transitions. [2021-11-12 22:52:02,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 10 states have internal predecessors, (146), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-12 22:52:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 4848 transitions. [2021-11-12 22:52:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-12 22:52:02,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:02,482 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:52:02,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:02,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:02,697 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1523065739, now seen corresponding path program 1 times [2021-11-12 22:52:02,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:02,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906147105] [2021-11-12 22:52:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:02,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:02,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:02,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:02,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:52:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:09,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:52:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-12 22:52:10,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-12 22:52:11,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:11,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906147105] [2021-11-12 22:52:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906147105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:11,446 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:11,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 22:52:11,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230101188] [2021-11-12 22:52:11,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:11,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:52:11,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:11,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:52:11,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:52:11,448 INFO L87 Difference]: Start difference. First operand 3582 states and 4848 transitions. Second operand has 9 states, 7 states have (on average 19.0) internal successors, (133), 9 states have internal predecessors, (133), 4 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 22:52:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:12,413 INFO L93 Difference]: Finished difference Result 7205 states and 9777 transitions. [2021-11-12 22:52:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:52:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 19.0) internal successors, (133), 9 states have internal predecessors, (133), 4 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 220 [2021-11-12 22:52:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:12,450 INFO L225 Difference]: With dead ends: 7205 [2021-11-12 22:52:12,451 INFO L226 Difference]: Without dead ends: 3606 [2021-11-12 22:52:12,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:12,470 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 9 mSDsluCounter, 8621 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 573.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10352 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.17ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 627.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:12,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10352 Invalid, 122 Unknown, 0 Unchecked, 17.17ms Time], IncrementalHoareTripleChecker [16 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 627.12ms Time] [2021-11-12 22:52:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-11-12 22:52:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3606. [2021-11-12 22:52:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 2644 states have (on average 1.3033282904689865) internal successors, (3446), 2689 states have internal predecessors, (3446), 706 states have call successors, (706), 252 states have call predecessors, (706), 255 states have return successors, (720), 691 states have call predecessors, (720), 704 states have call successors, (720) [2021-11-12 22:52:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 4872 transitions. [2021-11-12 22:52:12,677 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 4872 transitions. Word has length 220 [2021-11-12 22:52:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:12,677 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 4872 transitions. [2021-11-12 22:52:12,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 19.0) internal successors, (133), 9 states have internal predecessors, (133), 4 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 22:52:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 4872 transitions. [2021-11-12 22:52:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 22:52:12,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:12,687 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:52:12,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:12,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:12,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2026463350, now seen corresponding path program 1 times [2021-11-12 22:52:12,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:12,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627879337] [2021-11-12 22:52:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:12,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:12,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:12,893 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:12,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:52:19,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-12 22:52:20,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-12 22:52:21,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:21,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627879337] [2021-11-12 22:52:21,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627879337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:21,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948147687] [2021-11-12 22:52:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:21,965 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:21,966 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:21,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:52:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:24,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 22:52:25,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-12 22:52:26,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948147687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:26,043 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:52:26,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 22:52:26,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186111073] [2021-11-12 22:52:26,044 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:26,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:26,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:52:26,045 INFO L87 Difference]: Start difference. First operand 3606 states and 4872 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-12 22:52:28,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:30,402 INFO L93 Difference]: Finished difference Result 10622 states and 14328 transitions. [2021-11-12 22:52:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) Word has length 221 [2021-11-12 22:52:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:30,445 INFO L225 Difference]: With dead ends: 10622 [2021-11-12 22:52:30,445 INFO L226 Difference]: Without dead ends: 7019 [2021-11-12 22:52:30,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:52:30,459 INFO L933 BasicCegarLoop]: 2713 mSDtfsCounter, 2385 mSDsluCounter, 3048 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3791.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2385 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.38ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4026.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:30,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2385 Valid, 5761 Invalid, 256 Unknown, 0 Unchecked, 17.38ms Time], IncrementalHoareTripleChecker [27 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 4026.22ms Time] [2021-11-12 22:52:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7019 states. [2021-11-12 22:52:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7019 to 6978. [2021-11-12 22:52:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6978 states, 5125 states have (on average 1.3022439024390244) internal successors, (6674), 5216 states have internal predecessors, (6674), 1347 states have call successors, (1347), 498 states have call predecessors, (1347), 505 states have return successors, (1377), 1316 states have call predecessors, (1377), 1345 states have call successors, (1377) [2021-11-12 22:52:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6978 states to 6978 states and 9398 transitions. [2021-11-12 22:52:30,844 INFO L78 Accepts]: Start accepts. Automaton has 6978 states and 9398 transitions. Word has length 221 [2021-11-12 22:52:30,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:30,846 INFO L470 AbstractCegarLoop]: Abstraction has 6978 states and 9398 transitions. [2021-11-12 22:52:30,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-12 22:52:30,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6978 states and 9398 transitions. [2021-11-12 22:52:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-12 22:52:30,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:30,860 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:52:30,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:31,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:31,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:31,279 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1757005581, now seen corresponding path program 1 times [2021-11-12 22:52:31,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:31,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458329157] [2021-11-12 22:52:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:31,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:31,286 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:31,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:52:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:52:38,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-12 22:52:39,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:52:41,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:41,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458329157] [2021-11-12 22:52:41,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458329157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:41,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1799270855] [2021-11-12 22:52:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:41,026 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:41,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:41,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:52:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:43,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-12 22:52:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-12 22:52:46,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-12 22:52:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1799270855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:50,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:52:50,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 10] imperfect sequences [7, 7] total 31 [2021-11-12 22:52:50,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086697769] [2021-11-12 22:52:50,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:50,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 22:52:50,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 22:52:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:52:50,925 INFO L87 Difference]: Start difference. First operand 6978 states and 9398 transitions. Second operand has 22 states, 22 states have (on average 7.7272727272727275) internal successors, (170), 14 states have internal predecessors, (170), 3 states have call successors, (39), 3 states have call predecessors, (39), 10 states have return successors, (41), 10 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 22:53:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:10,548 INFO L93 Difference]: Finished difference Result 30488 states and 43008 transitions. [2021-11-12 22:53:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 22:53:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.7272727272727275) internal successors, (170), 14 states have internal predecessors, (170), 3 states have call successors, (39), 3 states have call predecessors, (39), 10 states have return successors, (41), 10 states have call predecessors, (41), 3 states have call successors, (41) Word has length 252 [2021-11-12 22:53:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:10,658 INFO L225 Difference]: With dead ends: 30488 [2021-11-12 22:53:10,658 INFO L226 Difference]: Without dead ends: 23513 [2021-11-12 22:53:10,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=173, Invalid=2083, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 22:53:10,693 INFO L933 BasicCegarLoop]: 2614 mSDtfsCounter, 3250 mSDsluCounter, 43393 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14326.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 46007 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 105.71ms SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15397.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:10,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3408 Valid, 46007 Invalid, 2632 Unknown, 0 Unchecked, 105.71ms Time], IncrementalHoareTripleChecker [164 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 15397.34ms Time] [2021-11-12 22:53:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23513 states. [2021-11-12 22:53:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23513 to 7000. [2021-11-12 22:53:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7000 states, 5141 states have (on average 1.3013032483952538) internal successors, (6690), 5232 states have internal predecessors, (6690), 1347 states have call successors, (1347), 498 states have call predecessors, (1347), 511 states have return successors, (1401), 1322 states have call predecessors, (1401), 1345 states have call successors, (1401) [2021-11-12 22:53:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7000 states to 7000 states and 9438 transitions. [2021-11-12 22:53:11,554 INFO L78 Accepts]: Start accepts. Automaton has 7000 states and 9438 transitions. Word has length 252 [2021-11-12 22:53:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:11,554 INFO L470 AbstractCegarLoop]: Abstraction has 7000 states and 9438 transitions. [2021-11-12 22:53:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.7272727272727275) internal successors, (170), 14 states have internal predecessors, (170), 3 states have call successors, (39), 3 states have call predecessors, (39), 10 states have return successors, (41), 10 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 22:53:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 7000 states and 9438 transitions. [2021-11-12 22:53:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-12 22:53:11,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:11,569 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:53:11,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:11,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:11,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:11,983 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1960950714, now seen corresponding path program 1 times [2021-11-12 22:53:11,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:11,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930201970] [2021-11-12 22:53:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:11,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:11,990 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:11,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:53:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:19,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:53:20,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:53:21,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:21,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930201970] [2021-11-12 22:53:21,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930201970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:21,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465897503] [2021-11-12 22:53:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:21,526 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:21,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:21,527 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:21,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:53:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:26,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:53:27,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:53:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465897503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:28,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700978781] [2021-11-12 22:53:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:28,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:28,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:28,816 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:53:28,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:53:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:30,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:53:30,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-12 22:53:31,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-12 22:53:33,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700978781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:33,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:53:33,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7, 7, 7, 7] total 17 [2021-11-12 22:53:33,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794986715] [2021-11-12 22:53:33,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:33,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:53:33,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:53:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:53:33,069 INFO L87 Difference]: Start difference. First operand 7000 states and 9438 transitions. Second operand has 8 states, 6 states have (on average 26.166666666666668) internal successors, (157), 7 states have internal predecessors, (157), 4 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (38), 3 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 22:53:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:34,433 INFO L93 Difference]: Finished difference Result 16339 states and 22503 transitions. [2021-11-12 22:53:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 26.166666666666668) internal successors, (157), 7 states have internal predecessors, (157), 4 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (38), 3 states have call predecessors, (38), 4 states have call successors, (38) Word has length 272 [2021-11-12 22:53:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:34,467 INFO L225 Difference]: With dead ends: 16339 [2021-11-12 22:53:34,468 INFO L226 Difference]: Without dead ends: 9342 [2021-11-12 22:53:34,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1627 GetRequests, 1611 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:53:34,488 INFO L933 BasicCegarLoop]: 2223 mSDtfsCounter, 350 mSDsluCounter, 10670 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 568.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 12893 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 597.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:34,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 12893 Invalid, 98 Unknown, 0 Unchecked, 18.27ms Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 26 Unchecked, 597.10ms Time] [2021-11-12 22:53:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9342 states. [2021-11-12 22:53:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9342 to 7000. [2021-11-12 22:53:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7000 states, 5141 states have (on average 1.3009142190235363) internal successors, (6688), 5232 states have internal predecessors, (6688), 1347 states have call successors, (1347), 498 states have call predecessors, (1347), 511 states have return successors, (1401), 1322 states have call predecessors, (1401), 1345 states have call successors, (1401) [2021-11-12 22:53:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7000 states to 7000 states and 9436 transitions. [2021-11-12 22:53:34,997 INFO L78 Accepts]: Start accepts. Automaton has 7000 states and 9436 transitions. Word has length 272 [2021-11-12 22:53:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:34,998 INFO L470 AbstractCegarLoop]: Abstraction has 7000 states and 9436 transitions. [2021-11-12 22:53:34,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 26.166666666666668) internal successors, (157), 7 states have internal predecessors, (157), 4 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (38), 3 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 22:53:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 7000 states and 9436 transitions. [2021-11-12 22:53:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-12 22:53:35,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:35,012 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:53:35,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:35,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:35,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-12 22:53:35,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:35,638 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:35,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1084931708, now seen corresponding path program 1 times [2021-11-12 22:53:35,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:35,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047157780] [2021-11-12 22:53:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:35,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:35,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:35,644 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:35,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:53:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:53:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:53:45,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:45,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047157780] [2021-11-12 22:53:45,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047157780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:45,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1491157706] [2021-11-12 22:53:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:45,323 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:45,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:45,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:45,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:53:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:53:51,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:53:52,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1491157706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737583106] [2021-11-12 22:53:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:52,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:52,612 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:53:52,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:53:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:54,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-12 22:53:55,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:53:56,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737583106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:56,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:53:56,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-12 22:53:56,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100843366] [2021-11-12 22:53:56,529 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:53:56,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:53:56,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:56,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:53:56,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:53:56,531 INFO L87 Difference]: Start difference. First operand 7000 states and 9436 transitions. Second operand has 11 states, 9 states have (on average 20.333333333333332) internal successors, (183), 11 states have internal predecessors, (183), 4 states have call successors, (50), 2 states have call predecessors, (50), 5 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-12 22:53:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:57,821 INFO L93 Difference]: Finished difference Result 14069 states and 19013 transitions. [2021-11-12 22:53:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:53:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 20.333333333333332) internal successors, (183), 11 states have internal predecessors, (183), 4 states have call successors, (50), 2 states have call predecessors, (50), 5 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) Word has length 272 [2021-11-12 22:53:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:57,857 INFO L225 Difference]: With dead ends: 14069 [2021-11-12 22:53:57,857 INFO L226 Difference]: Without dead ends: 7008 [2021-11-12 22:53:57,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1629 GetRequests, 1617 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:53:57,874 INFO L933 BasicCegarLoop]: 1732 mSDtfsCounter, 16 mSDsluCounter, 10371 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 660.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12103 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.54ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 713.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:57,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 12103 Invalid, 155 Unknown, 0 Unchecked, 12.54ms Time], IncrementalHoareTripleChecker [26 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 713.49ms Time] [2021-11-12 22:53:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7008 states. [2021-11-12 22:53:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7008 to 7008. [2021-11-12 22:53:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7008 states, 5149 states have (on average 1.300446688677413) internal successors, (6696), 5240 states have internal predecessors, (6696), 1347 states have call successors, (1347), 498 states have call predecessors, (1347), 511 states have return successors, (1401), 1322 states have call predecessors, (1401), 1345 states have call successors, (1401) [2021-11-12 22:53:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7008 states to 7008 states and 9444 transitions. [2021-11-12 22:53:58,300 INFO L78 Accepts]: Start accepts. Automaton has 7008 states and 9444 transitions. Word has length 272 [2021-11-12 22:53:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:58,301 INFO L470 AbstractCegarLoop]: Abstraction has 7008 states and 9444 transitions. [2021-11-12 22:53:58,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 20.333333333333332) internal successors, (183), 11 states have internal predecessors, (183), 4 states have call successors, (50), 2 states have call predecessors, (50), 5 states have return successors, (48), 4 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-12 22:53:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7008 states and 9444 transitions. [2021-11-12 22:53:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-12 22:53:58,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:58,315 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-12 22:53:58,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:58,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:58,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:58,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:58,939 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash 293800963, now seen corresponding path program 2 times [2021-11-12 22:53:58,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:58,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541839361] [2021-11-12 22:53:58,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:53:58,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:58,947 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:58,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dc3528-1acd-4d1a-9cb7-6ef5d58775bd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process