./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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 c2d7f6c194f04de54ba5a893678a720456a663ad567a49e51faf84a68b16d812 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:22:59,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:22:59,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:00,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:00,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:00,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:00,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:00,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:00,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:00,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:00,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:00,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:00,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:00,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:00,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:00,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:00,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:00,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:00,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:00,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:00,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:00,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:00,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:00,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:00,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:00,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:00,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:00,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:00,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:00,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:00,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:00,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:00,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:00,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:00,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:00,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:00,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:00,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:00,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:00,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:00,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:00,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:23:00,132 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:00,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:00,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:00,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:00,134 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:00,135 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:00,135 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:00,135 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:23:00,141 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:00,141 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:00,142 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:23:00,143 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:23:00,143 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:00,143 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:23:00,143 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:23:00,144 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:23:00,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:00,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:23:00,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:00,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:00,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:00,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:00,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:00,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:00,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:00,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:00,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:00,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:00,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:00,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:00,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:00,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:00,148 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:23:00,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:23:00,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:00,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:00,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:00,148 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2d7f6c194f04de54ba5a893678a720456a663ad567a49e51faf84a68b16d812 [2021-11-12 22:23:00,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:00,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:00,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:00,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:00,445 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:00,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-12 22:23:00,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/51797e677/7da12a4b5f744be5b1f4b46a5d3dd395/FLAG928a3d637 [2021-11-12 22:23:01,535 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:01,536 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-12 22:23:01,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/51797e677/7da12a4b5f744be5b1f4b46a5d3dd395/FLAG928a3d637 [2021-11-12 22:23:01,931 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/51797e677/7da12a4b5f744be5b1f4b46a5d3dd395 [2021-11-12 22:23:01,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:01,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:01,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:01,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:01,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:01,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:01" (1/1) ... [2021-11-12 22:23:01,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6602cf88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:01, skipping insertion in model container [2021-11-12 22:23:01,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:01" (1/1) ... [2021-11-12 22:23:01,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:02,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:03,665 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 22:23:03,675 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 22:23:03,975 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 22:23:04,258 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 22:23:04,273 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 22:23:04,282 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 22:23:04,307 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 22:23:04,308 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 22:23:04,317 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 22:23:04,326 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 22:23:04,347 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 22:23:04,348 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 22:23:04,357 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 22:23:04,370 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 22:23:04,371 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 22:23:04,379 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 22:23:04,388 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 22:23:04,389 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 22:23:04,390 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 22:23:04,399 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 22:23:04,434 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 22:23:04,434 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 22:23:04,435 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 22:23:04,435 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 22:23:04,436 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 22:23:04,442 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 22:23:04,443 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 22:23:04,445 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 22:23:04,452 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 22:23:04,459 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 22:23:04,470 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 22:23:04,471 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 22:23:04,486 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 22:23:04,501 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 22:23:04,508 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 22:23:04,514 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 22:23:04,531 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 22:23:04,538 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 22:23:04,556 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 22:23:04,557 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 22:23:04,559 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 22:23:04,563 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 22:23:04,570 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 22:23:04,594 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 22:23:04,655 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 22:23:04,659 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 22:23:04,667 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 22:23:04,684 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 22:23:04,698 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 22:23:04,705 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 22:23:04,713 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 22:23:04,720 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 22:23:04,729 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 22:23:04,740 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 22:23:05,180 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 22:23:05,185 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 22:23:05,186 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 22:23:05,265 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 22:23:05,265 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 22:23:05,308 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 22:23:05,320 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 22:23:06,145 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415292,415305] [2021-11-12 22:23:06,150 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415437,415450] [2021-11-12 22:23:06,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:06,228 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 22:23:06,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1088feab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:06, skipping insertion in model container [2021-11-12 22:23:06,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:06,230 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:23:06,232 INFO L158 Benchmark]: Toolchain (without parser) took 4292.67ms. Allocated memory was 140.5MB in the beginning and 192.9MB in the end (delta: 52.4MB). Free memory was 88.5MB in the beginning and 118.0MB in the end (delta: -29.5MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. [2021-11-12 22:23:06,233 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 55.1MB in the beginning and 55.0MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:23:06,234 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4287.54ms. Allocated memory was 140.5MB in the beginning and 192.9MB in the end (delta: 52.4MB). Free memory was 88.3MB in the beginning and 118.0MB in the end (delta: -29.7MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. [2021-11-12 22:23:06,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 55.1MB in the beginning and 55.0MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4287.54ms. Allocated memory was 140.5MB in the beginning and 192.9MB in the end (delta: 52.4MB). Free memory was 88.3MB in the beginning and 118.0MB in the end (delta: -29.7MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6605]: 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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 c2d7f6c194f04de54ba5a893678a720456a663ad567a49e51faf84a68b16d812 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:23:08,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:08,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:08,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:08,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:08,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:08,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:08,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:08,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:08,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:08,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:08,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:08,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:08,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:08,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:08,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:08,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:08,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:08,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:08,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:08,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:08,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:08,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:08,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:08,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:08,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:08,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:08,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:08,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:08,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:08,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:08,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:08,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:08,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:08,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:08,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:08,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:08,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:08,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:08,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:08,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:08,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:23:08,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:08,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:08,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:08,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:08,556 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:08,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:08,556 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:08,557 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:08,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:08,558 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:08,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:08,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:08,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:08,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:08,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:08,561 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:08,561 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:23:08,561 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:23:08,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:08,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:08,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:08,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:08,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:23:08,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:08,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:08,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:08,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:08,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:08,564 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:23:08,564 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:23:08,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:08,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:08,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:08,565 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2d7f6c194f04de54ba5a893678a720456a663ad567a49e51faf84a68b16d812 [2021-11-12 22:23:08,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:08,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:08,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:08,987 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:08,987 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:08,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-12 22:23:09,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/da50b3eb9/ffdf68e5e0cc4fee9ad2f3e4661aaf9d/FLAG975203a6a [2021-11-12 22:23:10,096 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:10,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-12 22:23:10,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/da50b3eb9/ffdf68e5e0cc4fee9ad2f3e4661aaf9d/FLAG975203a6a [2021-11-12 22:23:10,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/data/da50b3eb9/ffdf68e5e0cc4fee9ad2f3e4661aaf9d [2021-11-12 22:23:10,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:10,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:10,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:10,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:10,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:10,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:10" (1/1) ... [2021-11-12 22:23:10,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@401c629b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:10, skipping insertion in model container [2021-11-12 22:23:10,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:10" (1/1) ... [2021-11-12 22:23:10,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:10,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:14,466 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415292,415305] [2021-11-12 22:23:14,469 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415437,415450] [2021-11-12 22:23:14,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:14,575 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:23:14,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:15,137 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415292,415305] [2021-11-12 22:23:15,138 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415437,415450] [2021-11-12 22:23:15,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:15,179 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:23:15,656 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415292,415305] [2021-11-12 22:23:15,657 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_5ded3c4d-ffc8-4ef8-89de-30650b45e719/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[415437,415450] [2021-11-12 22:23:15,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:16,007 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:23:16,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16 WrapperNode [2021-11-12 22:23:16,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:16,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:16,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:23:16,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:23:16,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:16,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:23:16,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:23:16,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:23:16,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:23:16,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:23:16,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:23:16,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:23:16,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (1/1) ... [2021-11-12 22:23:16,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:16,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:16,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:23:16,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:23:16,670 INFO L130 BoogieDeclarations]: Found specification of procedure get_page [2021-11-12 22:23:16,718 INFO L138 BoogieDeclarations]: Found implementation of procedure get_page [2021-11-12 22:23:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 22:23:16,718 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 22:23:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2021-11-12 22:23:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2021-11-12 22:23:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-12 22:23:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-12 22:23:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:23:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:23:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_rx_lock_of_netfront_info [2021-11-12 22:23:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_rx_lock_of_netfront_info [2021-11-12 22:23:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure bind_evtchn_to_irqhandler [2021-11-12 22:23:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_evtchn_to_irqhandler [2021-11-12 22:23:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-12 22:23:16,720 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-12 22:23:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_interrupt [2021-11-12 22:23:16,720 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_interrupt [2021-11-12 22:23:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-12 22:23:16,720 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-12 22:23:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_grant_ring [2021-11-12 22:23:16,720 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_grant_ring [2021-11-12 22:23:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure free_percpu [2021-11-12 22:23:16,720 INFO L138 BoogieDeclarations]: Found implementation of procedure free_percpu [2021-11-12 22:23:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_claim_grant_reference [2021-11-12 22:23:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_claim_grant_reference [2021-11-12 22:23:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access [2021-11-12 22:23:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access [2021-11-12 22:23:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_disconnect_backend [2021-11-12 22:23:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_disconnect_backend [2021-11-12 22:23:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 22:23:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 22:23:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_alloc_grant_references [2021-11-12 22:23:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_alloc_grant_references [2021-11-12 22:23:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_release_grant_reference [2021-11-12 22:23:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_release_grant_reference [2021-11-12 22:23:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 22:23:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 22:23:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-12 22:23:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-12 22:23:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 22:23:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 22:23:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rxidx [2021-11-12 22:23:16,723 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rxidx [2021-11-12 22:23:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:23:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:23:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:23:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-12 22:23:16,723 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-12 22:23:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure pfn_to_mfn [2021-11-12 22:23:16,723 INFO L138 BoogieDeclarations]: Found implementation of procedure pfn_to_mfn [2021-11-12 22:23:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure skb_entry_set_link [2021-11-12 22:23:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_entry_set_link [2021-11-12 22:23:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 22:23:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 22:23:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_free_grant_references [2021-11-12 22:23:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_free_grant_references [2021-11-12 22:23:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2021-11-12 22:23:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2021-11-12 22:23:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-12 22:23:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-12 22:23:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 22:23:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 22:23:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 22:23:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 22:23:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-12 22:23:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-12 22:23:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-12 22:23:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-12 22:23:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_124 [2021-11-12 22:23:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_124 [2021-11-12 22:23:16,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 22:23:16,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 22:23:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-12 22:23:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-12 22:23:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_rx_ref [2021-11-12 22:23:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_rx_ref [2021-11-12 22:23:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_tx_lock_of_netfront_info [2021-11-12 22:23:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_tx_lock_of_netfront_info [2021-11-12 22:23:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-12 22:23:16,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-12 22:23:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:23:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-12 22:23:16,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-12 22:23:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 22:23:16,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 22:23:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:23:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-12 22:23:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-12 22:23:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-12 22:23:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-12 22:23:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_grant_foreign_access_ref [2021-11-12 22:23:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_grant_foreign_access_ref [2021-11-12 22:23:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 22:23:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 22:23:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 22:23:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 22:23:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 22:23:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 22:23:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 22:23:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 22:23:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_rx_skb [2021-11-12 22:23:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_rx_skb [2021-11-12 22:23:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:23:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:23:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_netif_exit_20_2 [2021-11-12 22:23:16,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_netif_exit_20_2 [2021-11-12 22:23:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 22:23:16,741 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 22:23:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:23:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:23:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:23:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:23:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:23:16,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:23:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_release_tx_bufs [2021-11-12 22:23:16,742 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_release_tx_bufs [2021-11-12 22:23:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2021-11-12 22:23:16,743 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2021-11-12 22:23:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_write [2021-11-12 22:23:16,743 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_write [2021-11-12 22:23:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-12 22:23:16,743 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-12 22:23:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-12 22:23:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-12 22:23:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2021-11-12 22:23:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2021-11-12 22:23:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:23:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:23:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 22:23:16,745 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 22:23:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_get_drvdata [2021-11-12 22:23:16,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_get_drvdata [2021-11-12 22:23:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_alloc_evtchn [2021-11-12 22:23:16,745 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_alloc_evtchn [2021-11-12 22:23:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-12 22:23:16,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-12 22:23:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:23:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure netfront_tx_slot_available [2021-11-12 22:23:16,746 INFO L138 BoogieDeclarations]: Found implementation of procedure netfront_tx_slot_available [2021-11-12 22:23:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure notify_remote_via_irq [2021-11-12 22:23:16,746 INFO L138 BoogieDeclarations]: Found implementation of procedure notify_remote_via_irq [2021-11-12 22:23:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_tx_lock_of_netfront_info [2021-11-12 22:23:16,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_tx_lock_of_netfront_info [2021-11-12 22:23:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:23:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_tail [2021-11-12 22:23:16,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_tail [2021-11-12 22:23:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf_min [2021-11-12 22:23:16,747 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf_min [2021-11-12 22:23:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_107 [2021-11-12 22:23:16,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_107 [2021-11-12 22:23:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:23:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:23:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:23:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:23:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:23:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-11-12 22:23:16,749 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-11-12 22:23:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure add_id_to_freelist [2021-11-12 22:23:16,749 INFO L138 BoogieDeclarations]: Found implementation of procedure add_id_to_freelist [2021-11-12 22:23:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_alloc_rx_buffers [2021-11-12 22:23:16,749 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_alloc_rx_buffers [2021-11-12 22:23:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 22:23:16,750 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 22:23:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 22:23:16,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 22:23:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure free_pages [2021-11-12 22:23:16,750 INFO L138 BoogieDeclarations]: Found implementation of procedure free_pages [2021-11-12 22:23:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access_ref [2021-11-12 22:23:16,751 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access_ref [2021-11-12 22:23:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-12 22:23:16,751 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-12 22:23:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_104 [2021-11-12 22:23:16,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_104 [2021-11-12 22:23:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2021-11-12 22:23:16,751 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2021-11-12 22:23:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure get_zeroed_page [2021-11-12 22:23:16,752 INFO L138 BoogieDeclarations]: Found implementation of procedure get_zeroed_page [2021-11-12 22:23:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2021-11-12 22:23:16,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2021-11-12 22:23:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 22:23:16,752 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 22:23:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 22:23:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 22:23:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2021-11-12 22:23:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2021-11-12 22:23:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_end_access [2021-11-12 22:23:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_end_access [2021-11-12 22:23:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 22:23:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 22:23:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 22:23:16,754 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 22:23:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure skb_add_rx_frag [2021-11-12 22:23:16,754 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_add_rx_frag [2021-11-12 22:23:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:23:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:23:16,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:23:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-12 22:23:16,755 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-12 22:23:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rx_interrupt [2021-11-12 22:23:16,755 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rx_interrupt [2021-11-12 22:23:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_rx_lock_of_netfront_info [2021-11-12 22:23:16,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_rx_lock_of_netfront_info [2021-11-12 22:23:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-12 22:23:16,756 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-12 22:23:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2021-11-12 22:23:16,756 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2021-11-12 22:23:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_105 [2021-11-12 22:23:16,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_105 [2021-11-12 22:23:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf_max [2021-11-12 22:23:16,757 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf_max [2021-11-12 22:23:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-12 22:23:16,757 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-12 22:23:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2021-11-12 22:23:16,757 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2021-11-12 22:23:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 22:23:16,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 22:23:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_interrupt [2021-11-12 22:23:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_interrupt [2021-11-12 22:23:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_123 [2021-11-12 22:23:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_123 [2021-11-12 22:23:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 22:23:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 22:23:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-12 22:23:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-12 22:23:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-12 22:23:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-12 22:23:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_free_evtchn [2021-11-12 22:23:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_free_evtchn [2021-11-12 22:23:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_buf_gc [2021-11-12 22:23:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_buf_gc [2021-11-12 22:23:18,706 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:24:04,942 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-12 22:24:05,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:24:05,922 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:24:05,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:05 BoogieIcfgContainer [2021-11-12 22:24:05,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:24:05,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:24:05,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:24:05,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:24:05,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:23:10" (1/3) ... [2021-11-12 22:24:05,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f39e383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:05, skipping insertion in model container [2021-11-12 22:24:05,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:16" (2/3) ... [2021-11-12 22:24:05,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f39e383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:05, skipping insertion in model container [2021-11-12 22:24:05,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:05" (3/3) ... [2021-11-12 22:24:05,935 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-12 22:24:05,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:24:05,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:24:05,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:24:06,004 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 22:24:06,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:24:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 1643 states, 1106 states have (on average 1.267631103074141) internal successors, (1402), 1125 states have internal predecessors, (1402), 431 states have call successors, (431), 106 states have call predecessors, (431), 105 states have return successors, (426), 425 states have call predecessors, (426), 426 states have call successors, (426) [2021-11-12 22:24:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-11-12 22:24:06,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:06,101 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:06,101 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1115823862, now seen corresponding path program 1 times [2021-11-12 22:24:06,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:06,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232818406] [2021-11-12 22:24:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:06,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:06,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:06,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:06,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:24:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:11,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3768 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 3681 trivial. 0 not checked. [2021-11-12 22:24:13,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3768 trivial. 0 not checked. [2021-11-12 22:24:14,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:14,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232818406] [2021-11-12 22:24:14,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232818406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:14,557 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:14,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:24:14,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347068340] [2021-11-12 22:24:14,560 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:14,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:24:14,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:14,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:24:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:24:14,608 INFO L87 Difference]: Start difference. First operand has 1643 states, 1106 states have (on average 1.267631103074141) internal successors, (1402), 1125 states have internal predecessors, (1402), 431 states have call successors, (431), 106 states have call predecessors, (431), 105 states have return successors, (426), 425 states have call predecessors, (426), 426 states have call successors, (426) Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-12 22:24:16,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:17,405 INFO L93 Difference]: Finished difference Result 4757 states and 6580 transitions. [2021-11-12 22:24:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:24:17,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) Word has length 465 [2021-11-12 22:24:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:17,449 INFO L225 Difference]: With dead ends: 4757 [2021-11-12 22:24:17,449 INFO L226 Difference]: Without dead ends: 3091 [2021-11-12 22:24:17,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 927 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 22:24:17,467 INFO L933 BasicCegarLoop]: 2650 mSDtfsCounter, 2079 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2387.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 4870 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.18ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2478.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:17,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2079 Valid, 4870 Invalid, 35 Unknown, 0 Unchecked, 36.18ms Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 2478.49ms Time] [2021-11-12 22:24:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-11-12 22:24:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 3083. [2021-11-12 22:24:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 2114 states have (on average 1.2630085146641439) internal successors, (2670), 2152 states have internal predecessors, (2670), 762 states have call successors, (762), 206 states have call predecessors, (762), 206 states have return successors, (762), 758 states have call predecessors, (762), 762 states have call successors, (762) [2021-11-12 22:24:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 4194 transitions. [2021-11-12 22:24:17,753 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 4194 transitions. Word has length 465 [2021-11-12 22:24:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 4194 transitions. [2021-11-12 22:24:17,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-12 22:24:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 4194 transitions. [2021-11-12 22:24:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-12 22:24:17,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:17,782 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:17,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:17,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:17,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -469601381, now seen corresponding path program 1 times [2021-11-12 22:24:17,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:17,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846412392] [2021-11-12 22:24:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:17,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:17,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:17,998 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:18,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:24:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:23,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:23,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3756 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 3669 trivial. 0 not checked. [2021-11-12 22:24:24,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3756 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3756 trivial. 0 not checked. [2021-11-12 22:24:25,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:25,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846412392] [2021-11-12 22:24:25,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846412392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:25,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:25,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:24:25,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577758411] [2021-11-12 22:24:25,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:25,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:24:25,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:24:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:24:25,681 INFO L87 Difference]: Start difference. First operand 3083 states and 4194 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-12 22:24:27,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:28,406 INFO L93 Difference]: Finished difference Result 9021 states and 12246 transitions. [2021-11-12 22:24:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:24:28,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) Word has length 459 [2021-11-12 22:24:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:28,454 INFO L225 Difference]: With dead ends: 9021 [2021-11-12 22:24:28,454 INFO L226 Difference]: Without dead ends: 6001 [2021-11-12 22:24:28,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 915 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 22:24:28,472 INFO L933 BasicCegarLoop]: 2612 mSDtfsCounter, 1999 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2387.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 4756 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.65ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2469.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:28,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1999 Valid, 4756 Invalid, 35 Unknown, 0 Unchecked, 16.65ms Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 2469.16ms Time] [2021-11-12 22:24:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2021-11-12 22:24:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 5997. [2021-11-12 22:24:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 4118 states have (on average 1.2620203982515785) internal successors, (5197), 4196 states have internal predecessors, (5197), 1467 states have call successors, (1467), 411 states have call predecessors, (1467), 411 states have return successors, (1467), 1457 states have call predecessors, (1467), 1467 states have call successors, (1467) [2021-11-12 22:24:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 8131 transitions. [2021-11-12 22:24:28,799 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 8131 transitions. Word has length 459 [2021-11-12 22:24:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:28,805 INFO L470 AbstractCegarLoop]: Abstraction has 5997 states and 8131 transitions. [2021-11-12 22:24:28,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-12 22:24:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 8131 transitions. [2021-11-12 22:24:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-11-12 22:24:28,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:28,830 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:28,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:29,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:29,031 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -989464172, now seen corresponding path program 1 times [2021-11-12 22:24:29,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:29,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786645155] [2021-11-12 22:24:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:29,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:29,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:29,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:29,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:24:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:34,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:34,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3768 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 3681 trivial. 0 not checked. [2021-11-12 22:24:35,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3768 trivial. 0 not checked. [2021-11-12 22:24:36,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:36,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786645155] [2021-11-12 22:24:36,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786645155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:36,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:36,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:24:36,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390899944] [2021-11-12 22:24:36,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:36,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:24:36,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:24:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:24:36,504 INFO L87 Difference]: Start difference. First operand 5997 states and 8131 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-12 22:24:38,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:39,410 INFO L93 Difference]: Finished difference Result 17684 states and 23937 transitions. [2021-11-12 22:24:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:24:39,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) Word has length 464 [2021-11-12 22:24:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:39,507 INFO L225 Difference]: With dead ends: 17684 [2021-11-12 22:24:39,507 INFO L226 Difference]: Without dead ends: 11750 [2021-11-12 22:24:39,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 925 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 22:24:39,539 INFO L933 BasicCegarLoop]: 2618 mSDtfsCounter, 2005 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2361.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 4763 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.58ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2444.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:39,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 4763 Invalid, 35 Unknown, 0 Unchecked, 15.58ms Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 2444.30ms Time] [2021-11-12 22:24:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11750 states. [2021-11-12 22:24:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11750 to 11744. [2021-11-12 22:24:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11744 states, 8075 states have (on average 1.2600619195046439) internal successors, (10175), 8233 states have internal predecessors, (10175), 2849 states have call successors, (2849), 819 states have call predecessors, (2849), 819 states have return successors, (2849), 2827 states have call predecessors, (2849), 2849 states have call successors, (2849) [2021-11-12 22:24:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11744 states to 11744 states and 15873 transitions. [2021-11-12 22:24:40,221 INFO L78 Accepts]: Start accepts. Automaton has 11744 states and 15873 transitions. Word has length 464 [2021-11-12 22:24:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:40,222 INFO L470 AbstractCegarLoop]: Abstraction has 11744 states and 15873 transitions. [2021-11-12 22:24:40,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-12 22:24:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 11744 states and 15873 transitions. [2021-11-12 22:24:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-12 22:24:40,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:40,269 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 29, 29, 29, 29, 29, 29, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:40,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:40,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:40,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 9095009, now seen corresponding path program 1 times [2021-11-12 22:24:40,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:40,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008167999] [2021-11-12 22:24:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:40,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:40,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:40,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:40,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:24:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3861 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 3681 trivial. 0 not checked. [2021-11-12 22:24:46,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3861 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3858 trivial. 0 not checked. [2021-11-12 22:24:47,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:47,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008167999] [2021-11-12 22:24:47,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008167999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:47,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:47,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:24:47,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127829673] [2021-11-12 22:24:47,968 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:47,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:24:47,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:24:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:24:47,969 INFO L87 Difference]: Start difference. First operand 11744 states and 15873 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 4 states have call successors, (73), 3 states have call predecessors, (73), 3 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2021-11-12 22:24:50,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:55,405 INFO L93 Difference]: Finished difference Result 36221 states and 48826 transitions. [2021-11-12 22:24:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 4 states have call successors, (73), 3 states have call predecessors, (73), 3 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) Word has length 481 [2021-11-12 22:24:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:55,553 INFO L225 Difference]: With dead ends: 36221 [2021-11-12 22:24:55,554 INFO L226 Difference]: Without dead ends: 24540 [2021-11-12 22:24:55,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 958 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 22:24:55,606 INFO L933 BasicCegarLoop]: 3027 mSDtfsCounter, 3916 mSDsluCounter, 3708 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6097.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3916 SdHoareTripleChecker+Valid, 6735 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.88ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6584.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:55,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3916 Valid, 6735 Invalid, 831 Unknown, 0 Unchecked, 33.88ms Time], IncrementalHoareTripleChecker [13 Valid, 817 Invalid, 1 Unknown, 0 Unchecked, 6584.69ms Time] [2021-11-12 22:24:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24540 states. [2021-11-12 22:24:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24540 to 24536. [2021-11-12 22:24:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24536 states, 16872 states have (on average 1.257882882882883) internal successors, (21223), 17192 states have internal predecessors, (21223), 5904 states have call successors, (5904), 1759 states have call predecessors, (5904), 1759 states have return successors, (5904), 5873 states have call predecessors, (5904), 5904 states have call successors, (5904) [2021-11-12 22:24:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24536 states to 24536 states and 33031 transitions. [2021-11-12 22:24:56,856 INFO L78 Accepts]: Start accepts. Automaton has 24536 states and 33031 transitions. Word has length 481 [2021-11-12 22:24:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:56,857 INFO L470 AbstractCegarLoop]: Abstraction has 24536 states and 33031 transitions. [2021-11-12 22:24:56,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 4 states have call successors, (73), 3 states have call predecessors, (73), 3 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2021-11-12 22:24:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24536 states and 33031 transitions. [2021-11-12 22:24:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2021-11-12 22:24:56,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:56,922 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:56,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:57,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:57,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 100904417, now seen corresponding path program 1 times [2021-11-12 22:24:57,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:57,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147754608] [2021-11-12 22:24:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:57,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:57,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:57,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:25:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:25:02,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 3719 trivial. 0 not checked. [2021-11-12 22:25:04,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2021-11-12 22:25:05,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:05,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147754608] [2021-11-12 22:25:05,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147754608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:05,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:05,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:25:05,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050079732] [2021-11-12 22:25:05,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:05,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:25:05,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:25:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:25:05,274 INFO L87 Difference]: Start difference. First operand 24536 states and 33031 transitions. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 4 states have call successors, (99), 3 states have call predecessors, (99), 3 states have return successors, (97), 4 states have call predecessors, (97), 4 states have call successors, (97) [2021-11-12 22:25:07,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:12,122 INFO L93 Difference]: Finished difference Result 72463 states and 97307 transitions. [2021-11-12 22:25:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:25:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 4 states have call successors, (99), 3 states have call predecessors, (99), 3 states have return successors, (97), 4 states have call predecessors, (97), 4 states have call successors, (97) Word has length 563 [2021-11-12 22:25:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:12,344 INFO L225 Difference]: With dead ends: 72463 [2021-11-12 22:25:12,344 INFO L226 Difference]: Without dead ends: 47990 [2021-11-12 22:25:12,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 1122 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 22:25:12,429 INFO L933 BasicCegarLoop]: 2609 mSDtfsCounter, 3576 mSDsluCounter, 2665 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 394 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5305.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3576 SdHoareTripleChecker+Valid, 5274 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.48ms SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5808.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:12,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3576 Valid, 5274 Invalid, 1122 Unknown, 0 Unchecked, 22.48ms Time], IncrementalHoareTripleChecker [394 Valid, 727 Invalid, 1 Unknown, 0 Unchecked, 5808.64ms Time] [2021-11-12 22:25:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47990 states. [2021-11-12 22:25:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47990 to 47970. [2021-11-12 22:25:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47970 states, 33288 states have (on average 1.2642994472482576) internal successors, (42086), 33779 states have internal predecessors, (42086), 11039 states have call successors, (11039), 3642 states have call predecessors, (11039), 3642 states have return successors, (11039), 10965 states have call predecessors, (11039), 11039 states have call successors, (11039) [2021-11-12 22:25:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47970 states to 47970 states and 64164 transitions. [2021-11-12 22:25:15,242 INFO L78 Accepts]: Start accepts. Automaton has 47970 states and 64164 transitions. Word has length 563 [2021-11-12 22:25:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:15,244 INFO L470 AbstractCegarLoop]: Abstraction has 47970 states and 64164 transitions. [2021-11-12 22:25:15,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 4 states have call successors, (99), 3 states have call predecessors, (99), 3 states have return successors, (97), 4 states have call predecessors, (97), 4 states have call successors, (97) [2021-11-12 22:25:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 47970 states and 64164 transitions. [2021-11-12 22:25:15,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-11-12 22:25:15,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:15,623 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 29, 29, 29, 29, 29, 29, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:25:15,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:15,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:15,825 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash 805291434, now seen corresponding path program 1 times [2021-11-12 22:25:15,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:15,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244752838] [2021-11-12 22:25:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:15,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:15,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:15,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:15,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:25:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4373 backedges. 569 proven. 0 refuted. 0 times theorem prover too weak. 3804 trivial. 0 not checked. [2021-11-12 22:25:23,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4373 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 4319 trivial. 0 not checked. [2021-11-12 22:25:25,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:25,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244752838] [2021-11-12 22:25:25,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244752838] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:25,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:25:25,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-11-12 22:25:25,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126343757] [2021-11-12 22:25:25,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:25,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:25:25,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:25:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:25:25,982 INFO L87 Difference]: Start difference. First operand 47970 states and 64164 transitions. Second operand has 12 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 5 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (58), 5 states have call predecessors, (58), 5 states have call successors, (58) [2021-11-12 22:25:28,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:41,574 INFO L93 Difference]: Finished difference Result 119788 states and 160151 transitions. [2021-11-12 22:25:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:25:41,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 5 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (58), 5 states have call predecessors, (58), 5 states have call successors, (58) Word has length 552 [2021-11-12 22:25:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:41,940 INFO L225 Difference]: With dead ends: 119788 [2021-11-12 22:25:41,941 INFO L226 Difference]: Without dead ends: 72262 [2021-11-12 22:25:42,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1084 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:25:42,075 INFO L933 BasicCegarLoop]: 3961 mSDtfsCounter, 4664 mSDsluCounter, 29696 mSDsCounter, 0 mSdLazyCounter, 2603 mSolverCounterSat, 1154 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11072.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4678 SdHoareTripleChecker+Valid, 33657 SdHoareTripleChecker+Invalid, 3758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 94.22ms SdHoareTripleChecker+Time, 1154 IncrementalHoareTripleChecker+Valid, 2603 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12078.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:42,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4678 Valid, 33657 Invalid, 3758 Unknown, 0 Unchecked, 94.22ms Time], IncrementalHoareTripleChecker [1154 Valid, 2603 Invalid, 1 Unknown, 0 Unchecked, 12078.27ms Time] [2021-11-12 22:25:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72262 states. [2021-11-12 22:25:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72262 to 72068. [2021-11-12 22:25:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72068 states, 50009 states have (on average 1.2639124957507648) internal successors, (63207), 50784 states have internal predecessors, (63207), 16572 states have call successors, (16572), 5486 states have call predecessors, (16572), 5486 states have return successors, (16572), 16421 states have call predecessors, (16572), 16572 states have call successors, (16572) [2021-11-12 22:25:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72068 states to 72068 states and 96351 transitions. [2021-11-12 22:25:46,119 INFO L78 Accepts]: Start accepts. Automaton has 72068 states and 96351 transitions. Word has length 552 [2021-11-12 22:25:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:46,120 INFO L470 AbstractCegarLoop]: Abstraction has 72068 states and 96351 transitions. [2021-11-12 22:25:46,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 5 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (58), 5 states have call predecessors, (58), 5 states have call successors, (58) [2021-11-12 22:25:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 72068 states and 96351 transitions. [2021-11-12 22:25:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2021-11-12 22:25:46,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:46,561 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 29, 29, 29, 29, 29, 29, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:25:46,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:46,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:46,777 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2051365388, now seen corresponding path program 1 times [2021-11-12 22:25:46,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:46,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552101308] [2021-11-12 22:25:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:46,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:46,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:46,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:25:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:25:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 4334 trivial. 0 not checked. [2021-11-12 22:25:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4535 trivial. 0 not checked. [2021-11-12 22:25:55,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:55,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552101308] [2021-11-12 22:25:55,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552101308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:55,007 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:55,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:25:55,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433551511] [2021-11-12 22:25:55,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:55,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:25:55,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:25:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:25:55,011 INFO L87 Difference]: Start difference. First operand 72068 states and 96351 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 3 states have call successors, (82), 3 states have call predecessors, (82), 3 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2021-11-12 22:25:57,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:01,053 INFO L93 Difference]: Finished difference Result 178251 states and 238280 transitions. [2021-11-12 22:26:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:01,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 3 states have call successors, (82), 3 states have call predecessors, (82), 3 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) Word has length 578 [2021-11-12 22:26:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:01,536 INFO L225 Difference]: With dead ends: 178251 [2021-11-12 22:26:01,536 INFO L226 Difference]: Without dead ends: 106651 [2021-11-12 22:26:01,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1154 GetRequests, 1153 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 22:26:01,724 INFO L933 BasicCegarLoop]: 3866 mSDtfsCounter, 2003 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2417.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2003 SdHoareTripleChecker+Valid, 6008 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.71ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2493.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:01,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2003 Valid, 6008 Invalid, 33 Unknown, 0 Unchecked, 9.71ms Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 1 Unknown, 0 Unchecked, 2493.06ms Time] [2021-11-12 22:26:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106651 states. [2021-11-12 22:26:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106651 to 106631. [2021-11-12 22:26:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106631 states, 73994 states have (on average 1.262818606914074) internal successors, (93441), 75158 states have internal predecessors, (93441), 24477 states have call successors, (24477), 8159 states have call predecessors, (24477), 8159 states have return successors, (24477), 24246 states have call predecessors, (24477), 24477 states have call successors, (24477) [2021-11-12 22:26:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106631 states to 106631 states and 142395 transitions. [2021-11-12 22:26:07,545 INFO L78 Accepts]: Start accepts. Automaton has 106631 states and 142395 transitions. Word has length 578 [2021-11-12 22:26:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:07,547 INFO L470 AbstractCegarLoop]: Abstraction has 106631 states and 142395 transitions. [2021-11-12 22:26:07,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 3 states have call successors, (82), 3 states have call predecessors, (82), 3 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2021-11-12 22:26:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 106631 states and 142395 transitions. [2021-11-12 22:26:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2021-11-12 22:26:08,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:08,143 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 29, 29, 29, 29, 29, 29, 9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:08,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:08,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:08,357 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash -311719109, now seen corresponding path program 1 times [2021-11-12 22:26:08,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:08,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104698002] [2021-11-12 22:26:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:08,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:08,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:08,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:08,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ded3c4d-ffc8-4ef8-89de-30650b45e719/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:26:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:26:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 4322 trivial. 0 not checked. [2021-11-12 22:26:15,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4499 trivial. 0 not checked. [2021-11-12 22:26:16,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:16,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104698002] [2021-11-12 22:26:16,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104698002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:16,596 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:16,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:26:16,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224739539] [2021-11-12 22:26:16,597 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:16,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:16,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:16,601 INFO L87 Difference]: Start difference. First operand 106631 states and 142395 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 3 states have call successors, (80), 3 states have call predecessors, (80), 3 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2021-11-12 22:26:18,923 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 22:26:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:25,175 INFO L93 Difference]: Finished difference Result 263283 states and 351452 transitions. [2021-11-12 22:26:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 3 states have call successors, (80), 3 states have call predecessors, (80), 3 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 573 [2021-11-12 22:26:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:26,300 INFO L225 Difference]: With dead ends: 263283 [2021-11-12 22:26:26,300 INFO L226 Difference]: Without dead ends: 157120 [2021-11-12 22:26:26,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1143 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 22:26:26,522 INFO L933 BasicCegarLoop]: 3988 mSDtfsCounter, 1996 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2393.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 6129 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.66ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2478.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:26,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1996 Valid, 6129 Invalid, 33 Unknown, 0 Unchecked, 10.66ms Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 1 Unknown, 0 Unchecked, 2478.00ms Time] [2021-11-12 22:26:26,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157120 states.