./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta --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 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:37:32,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:32,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:32,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:32,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:32,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:32,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:32,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:32,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:32,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:32,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:32,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:32,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:32,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:32,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:32,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:32,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:32,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:32,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:32,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:32,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:32,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:32,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:32,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:32,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:32,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:32,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:32,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:32,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:32,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:32,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:32,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:32,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:32,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:32,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:32,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:32,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:32,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:32,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:32,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:32,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:32,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:37:32,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:32,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:32,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:32,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:32,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:32,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:32,592 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:32,592 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:32,593 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:32,593 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:32,594 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:32,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:32,594 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:32,595 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:32,595 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:32,595 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:32,595 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:32,596 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:32,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:32,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:32,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:32,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:37:32,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:32,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:37:32,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:37:32,600 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:32,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:37:32,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:32,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:32,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:32,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:32,601 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:32,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:32,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:37:32,602 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:32,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:32,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:37:32,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:32,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be [2022-10-17 17:37:32,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:32,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:32,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:32,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:32,880 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:32,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2022-10-17 17:37:32,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/data/d069b40e6/6a57b61770244fbe9eb998900981eb18/FLAGc76fca0ac [2022-10-17 17:37:33,997 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:33,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2022-10-17 17:37:34,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/data/d069b40e6/6a57b61770244fbe9eb998900981eb18/FLAGc76fca0ac [2022-10-17 17:37:34,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/data/d069b40e6/6a57b61770244fbe9eb998900981eb18 [2022-10-17 17:37:34,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:34,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:34,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:34,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:34,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:34,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:34" (1/1) ... [2022-10-17 17:37:34,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32418770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:34, skipping insertion in model container [2022-10-17 17:37:34,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:34" (1/1) ... [2022-10-17 17:37:34,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:34,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:35,452 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2022-10-17 17:37:36,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:36,127 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:37:36,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2022-10-17 17:37:36,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:36,656 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:37:36,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36 WrapperNode [2022-10-17 17:37:36,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:36,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:36,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:37:36,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:37:36,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:36,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:36,886 INFO L138 Inliner]: procedures = 174, calls = 1340, calls flagged for inlining = 82, calls inlined = 66, statements flattened = 2613 [2022-10-17 17:37:36,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:36,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:37:36,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:37:36,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:37:36,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:36,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:36,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:36,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:37,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:37,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:37,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:37,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:37,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:37:37,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:37:37,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:37:37,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:37:37,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (1/1) ... [2022-10-17 17:37:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:37,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:37,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:37:37,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:37:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_reset_device [2022-10-17 17:37:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_reset_device [2022-10-17 17:37:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_resume [2022-10-17 17:37:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_resume [2022-10-17 17:37:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:37:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-10-17 17:37:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-10-17 17:37:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_12 [2022-10-17 17:37:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_12 [2022-10-17 17:37:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:37:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:37:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:37:37,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:37:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:37:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-10-17 17:37:37,255 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-10-17 17:37:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-10-17 17:37:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-10-17 17:37:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-17 17:37:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-17 17:37:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-17 17:37:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-17 17:37:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:37:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:37:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-10-17 17:37:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-10-17 17:37:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb_fwload [2022-10-17 17:37:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb_fwload [2022-10-17 17:37:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-10-17 17:37:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-10-17 17:37:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-10-17 17:37:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-10-17 17:37:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb [2022-10-17 17:37:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb [2022-10-17 17:37:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive_fwload [2022-10-17 17:37:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive_fwload [2022-10-17 17:37:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 17:37:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 17:37:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_send_fw_pkt [2022-10-17 17:37:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_send_fw_pkt [2022-10-17 17:37:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure __if_usb_submit_rx_urb [2022-10-17 17:37:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __if_usb_submit_rx_urb [2022-10-17 17:37:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:37:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:37:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:37:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_free [2022-10-17 17:37:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_free [2022-10-17 17:37:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 17:37:37,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 17:37:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:37:37,260 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:37:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:37:37,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:37:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:37:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-10-17 17:37:37,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-10-17 17:37:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_disconnect [2022-10-17 17:37:37,261 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_disconnect [2022-10-17 17:37:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure usb_tx_block [2022-10-17 17:37:37,261 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_tx_block [2022-10-17 17:37:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:37:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-10-17 17:37:37,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-10-17 17:37:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_9 [2022-10-17 17:37:37,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_9 [2022-10-17 17:37:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-10-17 17:37:37,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-10-17 17:37:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:37:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:37:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-10-17 17:37:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:37:37,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:37:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2022-10-17 17:37:37,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2022-10-17 17:37:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2022-10-17 17:37:37,263 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2022-10-17 17:37:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:37:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_13 [2022-10-17 17:37:37,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_13 [2022-10-17 17:37:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-10-17 17:37:37,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-10-17 17:37:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2022-10-17 17:37:37,264 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2022-10-17 17:37:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_15 [2022-10-17 17:37:37,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_15 [2022-10-17 17:37:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:37:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:37:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2022-10-17 17:37:37,264 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2022-10-17 17:37:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure lbs_remove_card [2022-10-17 17:37:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure lbs_remove_card [2022-10-17 17:37:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-10-17 17:37:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-10-17 17:37:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-10-17 17:37:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-10-17 17:37:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive [2022-10-17 17:37:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive [2022-10-17 17:37:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-10-17 17:37:37,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-10-17 17:37:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:37:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-10-17 17:37:37,266 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-10-17 17:37:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:37:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 17:37:37,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 17:37:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:37:37,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:37:37,827 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:37:37,830 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:37:38,253 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:37:39,327 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-10-17 17:37:40,848 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:37:41,635 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:37:41,636 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:37:41,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:41 BoogieIcfgContainer [2022-10-17 17:37:41,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:37:41,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:37:41,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:37:41,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:37:41,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:37:34" (1/3) ... [2022-10-17 17:37:41,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51190295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:41, skipping insertion in model container [2022-10-17 17:37:41,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36" (2/3) ... [2022-10-17 17:37:41,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51190295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:41, skipping insertion in model container [2022-10-17 17:37:41,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:41" (3/3) ... [2022-10-17 17:37:41,662 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2022-10-17 17:37:41,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:37:41,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:37:41,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:37:41,820 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33a9b4df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:37:41,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:37:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 598 states, 375 states have (on average 1.376) internal successors, (516), 405 states have internal predecessors, (516), 178 states have call successors, (178), 45 states have call predecessors, (178), 43 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) [2022-10-17 17:37:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:37:41,838 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:41,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:41,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1863941514, now seen corresponding path program 1 times [2022-10-17 17:37:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134697622] [2022-10-17 17:37:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:42,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134697622] [2022-10-17 17:37:42,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134697622] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:42,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:42,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516288392] [2022-10-17 17:37:42,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:42,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:42,640 INFO L87 Difference]: Start difference. First operand has 598 states, 375 states have (on average 1.376) internal successors, (516), 405 states have internal predecessors, (516), 178 states have call successors, (178), 45 states have call predecessors, (178), 43 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:44,509 INFO L93 Difference]: Finished difference Result 1758 states and 2549 transitions. [2022-10-17 17:37:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-10-17 17:37:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:44,538 INFO L225 Difference]: With dead ends: 1758 [2022-10-17 17:37:44,538 INFO L226 Difference]: Without dead ends: 1146 [2022-10-17 17:37:44,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:44,550 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 821 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:44,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 1636 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-17 17:37:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-10-17 17:37:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1146. [2022-10-17 17:37:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 726 states have (on average 1.3484848484848484) internal successors, (979), 766 states have internal predecessors, (979), 336 states have call successors, (336), 84 states have call predecessors, (336), 83 states have return successors, (331), 319 states have call predecessors, (331), 331 states have call successors, (331) [2022-10-17 17:37:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1646 transitions. [2022-10-17 17:37:44,781 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1646 transitions. Word has length 22 [2022-10-17 17:37:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:44,782 INFO L495 AbstractCegarLoop]: Abstraction has 1146 states and 1646 transitions. [2022-10-17 17:37:44,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1646 transitions. [2022-10-17 17:37:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 17:37:44,792 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:44,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:44,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:37:44,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:44,793 INFO L85 PathProgramCache]: Analyzing trace with hash -824288522, now seen corresponding path program 1 times [2022-10-17 17:37:44,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:44,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975042968] [2022-10-17 17:37:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:44,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:37:45,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:45,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975042968] [2022-10-17 17:37:45,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975042968] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:45,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:45,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:45,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967162179] [2022-10-17 17:37:45,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:45,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:45,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:45,504 INFO L87 Difference]: Start difference. First operand 1146 states and 1646 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:46,496 INFO L93 Difference]: Finished difference Result 2172 states and 3116 transitions. [2022-10-17 17:37:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:46,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-10-17 17:37:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:46,513 INFO L225 Difference]: With dead ends: 2172 [2022-10-17 17:37:46,513 INFO L226 Difference]: Without dead ends: 2169 [2022-10-17 17:37:46,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:46,518 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 739 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:46,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1573 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:37:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2022-10-17 17:37:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2157. [2022-10-17 17:37:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 1370 states have (on average 1.3489051094890512) internal successors, (1848), 1446 states have internal predecessors, (1848), 628 states have call successors, (628), 161 states have call predecessors, (628), 158 states have return successors, (623), 595 states have call predecessors, (623), 623 states have call successors, (623) [2022-10-17 17:37:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3099 transitions. [2022-10-17 17:37:46,702 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3099 transitions. Word has length 30 [2022-10-17 17:37:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:46,703 INFO L495 AbstractCegarLoop]: Abstraction has 2157 states and 3099 transitions. [2022-10-17 17:37:46,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3099 transitions. [2022-10-17 17:37:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-17 17:37:46,707 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:46,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:46,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:37:46,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:46,718 INFO L85 PathProgramCache]: Analyzing trace with hash 216448478, now seen corresponding path program 1 times [2022-10-17 17:37:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:46,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901635612] [2022-10-17 17:37:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:37:47,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901635612] [2022-10-17 17:37:47,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901635612] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:47,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:47,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:47,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211972747] [2022-10-17 17:37:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:47,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:47,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:47,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:47,292 INFO L87 Difference]: Start difference. First operand 2157 states and 3099 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:48,552 INFO L93 Difference]: Finished difference Result 4410 states and 6340 transitions. [2022-10-17 17:37:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-10-17 17:37:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:48,577 INFO L225 Difference]: With dead ends: 4410 [2022-10-17 17:37:48,577 INFO L226 Difference]: Without dead ends: 3278 [2022-10-17 17:37:48,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:48,584 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 810 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:48,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 1602 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 17:37:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3278 states. [2022-10-17 17:37:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3278 to 3267. [2022-10-17 17:37:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 2075 states have (on average 1.3479518072289156) internal successors, (2797), 2187 states have internal predecessors, (2797), 952 states have call successors, (952), 242 states have call predecessors, (952), 239 states have return successors, (947), 905 states have call predecessors, (947), 947 states have call successors, (947) [2022-10-17 17:37:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4696 transitions. [2022-10-17 17:37:48,908 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4696 transitions. Word has length 31 [2022-10-17 17:37:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:48,909 INFO L495 AbstractCegarLoop]: Abstraction has 3267 states and 4696 transitions. [2022-10-17 17:37:48,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4696 transitions. [2022-10-17 17:37:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-17 17:37:48,912 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:48,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:48,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:37:48,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1880438023, now seen corresponding path program 1 times [2022-10-17 17:37:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:48,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905956532] [2022-10-17 17:37:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:48,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:37:49,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:49,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905956532] [2022-10-17 17:37:49,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905956532] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:49,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:49,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365414697] [2022-10-17 17:37:49,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:49,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:49,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:49,149 INFO L87 Difference]: Start difference. First operand 3267 states and 4696 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:50,164 INFO L93 Difference]: Finished difference Result 5369 states and 7806 transitions. [2022-10-17 17:37:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-10-17 17:37:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:50,214 INFO L225 Difference]: With dead ends: 5369 [2022-10-17 17:37:50,214 INFO L226 Difference]: Without dead ends: 5366 [2022-10-17 17:37:50,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:50,225 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 796 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:50,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1623 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:37:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2022-10-17 17:37:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 5357. [2022-10-17 17:37:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5357 states, 3401 states have (on average 1.3490149955895325) internal successors, (4588), 3593 states have internal predecessors, (4588), 1564 states have call successors, (1564), 400 states have call predecessors, (1564), 391 states have return successors, (1643), 1475 states have call predecessors, (1643), 1559 states have call successors, (1643) [2022-10-17 17:37:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 7795 transitions. [2022-10-17 17:37:50,730 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 7795 transitions. Word has length 32 [2022-10-17 17:37:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:50,731 INFO L495 AbstractCegarLoop]: Abstraction has 5357 states and 7795 transitions. [2022-10-17 17:37:50,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 7795 transitions. [2022-10-17 17:37:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 17:37:50,735 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:50,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:50,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:37:50,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1835562049, now seen corresponding path program 1 times [2022-10-17 17:37:50,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:50,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124519272] [2022-10-17 17:37:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:50,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:37:50,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124519272] [2022-10-17 17:37:50,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124519272] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:50,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:50,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863204340] [2022-10-17 17:37:50,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:50,945 INFO L87 Difference]: Start difference. First operand 5357 states and 7795 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:51,824 INFO L93 Difference]: Finished difference Result 5359 states and 7796 transitions. [2022-10-17 17:37:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-10-17 17:37:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:51,872 INFO L225 Difference]: With dead ends: 5359 [2022-10-17 17:37:51,872 INFO L226 Difference]: Without dead ends: 5356 [2022-10-17 17:37:51,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:51,877 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 819 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:51,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 716 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:37:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-10-17 17:37:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 5356. [2022-10-17 17:37:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5356 states, 3401 states have (on average 1.3487209644222287) internal successors, (4587), 3592 states have internal predecessors, (4587), 1563 states have call successors, (1563), 400 states have call predecessors, (1563), 391 states have return successors, (1643), 1475 states have call predecessors, (1643), 1559 states have call successors, (1643) [2022-10-17 17:37:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5356 states to 5356 states and 7793 transitions. [2022-10-17 17:37:52,350 INFO L78 Accepts]: Start accepts. Automaton has 5356 states and 7793 transitions. Word has length 33 [2022-10-17 17:37:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:52,425 INFO L495 AbstractCegarLoop]: Abstraction has 5356 states and 7793 transitions. [2022-10-17 17:37:52,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5356 states and 7793 transitions. [2022-10-17 17:37:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 17:37:52,427 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:52,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:37:52,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1067452156, now seen corresponding path program 1 times [2022-10-17 17:37:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276984414] [2022-10-17 17:37:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:37:52,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276984414] [2022-10-17 17:37:52,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276984414] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:52,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:52,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:52,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919338279] [2022-10-17 17:37:52,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:52,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:52,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:52,608 INFO L87 Difference]: Start difference. First operand 5356 states and 7793 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:53,547 INFO L93 Difference]: Finished difference Result 5358 states and 7794 transitions. [2022-10-17 17:37:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-10-17 17:37:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:53,588 INFO L225 Difference]: With dead ends: 5358 [2022-10-17 17:37:53,588 INFO L226 Difference]: Without dead ends: 5349 [2022-10-17 17:37:53,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:53,594 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 816 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:53,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 715 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:37:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-10-17 17:37:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 5349. [2022-10-17 17:37:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 3395 states have (on average 1.348159057437408) internal successors, (4577), 3585 states have internal predecessors, (4577), 1562 states have call successors, (1562), 400 states have call predecessors, (1562), 391 states have return successors, (1643), 1475 states have call predecessors, (1643), 1559 states have call successors, (1643) [2022-10-17 17:37:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 7782 transitions. [2022-10-17 17:37:54,224 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 7782 transitions. Word has length 34 [2022-10-17 17:37:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:54,225 INFO L495 AbstractCegarLoop]: Abstraction has 5349 states and 7782 transitions. [2022-10-17 17:37:54,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:37:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 7782 transitions. [2022-10-17 17:37:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-17 17:37:54,237 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:54,237 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:37:54,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:37:54,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash 487729742, now seen corresponding path program 1 times [2022-10-17 17:37:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:54,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244483254] [2022-10-17 17:37:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:37:54,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:54,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244483254] [2022-10-17 17:37:54,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244483254] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:54,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:54,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:54,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156898558] [2022-10-17 17:37:54,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:54,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:54,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:54,570 INFO L87 Difference]: Start difference. First operand 5349 states and 7782 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-10-17 17:37:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:55,572 INFO L93 Difference]: Finished difference Result 8327 states and 12120 transitions. [2022-10-17 17:37:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 97 [2022-10-17 17:37:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:55,596 INFO L225 Difference]: With dead ends: 8327 [2022-10-17 17:37:55,596 INFO L226 Difference]: Without dead ends: 2992 [2022-10-17 17:37:55,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:55,618 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 84 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:55,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1412 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:37:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-10-17 17:37:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2976. [2022-10-17 17:37:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 1927 states have (on average 1.371043072132849) internal successors, (2642), 2047 states have internal predecessors, (2642), 825 states have call successors, (825), 228 states have call predecessors, (825), 223 states have return successors, (864), 762 states have call predecessors, (864), 822 states have call successors, (864) [2022-10-17 17:37:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4331 transitions. [2022-10-17 17:37:55,926 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4331 transitions. Word has length 97 [2022-10-17 17:37:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:55,926 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 4331 transitions. [2022-10-17 17:37:55,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-10-17 17:37:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4331 transitions. [2022-10-17 17:37:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-10-17 17:37:55,931 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:55,931 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:37:55,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:37:55,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -996855025, now seen corresponding path program 1 times [2022-10-17 17:37:55,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252512325] [2022-10-17 17:37:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:37:56,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252512325] [2022-10-17 17:37:56,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252512325] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:56,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:56,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:56,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290489594] [2022-10-17 17:37:56,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:56,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:56,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:56,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:56,231 INFO L87 Difference]: Start difference. First operand 2976 states and 4331 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:37:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:57,629 INFO L93 Difference]: Finished difference Result 7288 states and 10576 transitions. [2022-10-17 17:37:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:57,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2022-10-17 17:37:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:57,667 INFO L225 Difference]: With dead ends: 7288 [2022-10-17 17:37:57,667 INFO L226 Difference]: Without dead ends: 4370 [2022-10-17 17:37:57,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:57,682 INFO L413 NwaCegarLoop]: 1132 mSDtfsCounter, 747 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:57,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1674 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:37:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2022-10-17 17:37:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 4354. [2022-10-17 17:37:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 2828 states have (on average 1.3645685997171146) internal successors, (3859), 3001 states have internal predecessors, (3859), 1178 states have call successors, (1178), 353 states have call predecessors, (1178), 347 states have return successors, (1234), 1090 states have call predecessors, (1234), 1175 states have call successors, (1234) [2022-10-17 17:37:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 6271 transitions. [2022-10-17 17:37:58,072 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 6271 transitions. Word has length 103 [2022-10-17 17:37:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:58,074 INFO L495 AbstractCegarLoop]: Abstraction has 4354 states and 6271 transitions. [2022-10-17 17:37:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:37:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 6271 transitions. [2022-10-17 17:37:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-10-17 17:37:58,083 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:58,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:37:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:37:58,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1625495520, now seen corresponding path program 1 times [2022-10-17 17:37:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305122558] [2022-10-17 17:37:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 17:37:59,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:59,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305122558] [2022-10-17 17:37:59,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305122558] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:59,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221854928] [2022-10-17 17:37:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:59,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:59,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d50726-a712-4c2a-8347-9d174ca0978e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:37:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 55 conjunts are in the unsatisfiable core [2022-10-17 17:37:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:38:00,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 17:38:00,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221854928] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999615057] [2022-10-17 17:38:00,546 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-10-17 17:38:00,546 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:00,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:00,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:00,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs