./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P --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 e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:19:49,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:19:49,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:19:49,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:19:49,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:19:49,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:19:49,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:19:49,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:19:49,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:19:49,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:19:49,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:19:49,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:19:49,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:19:49,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:19:49,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:19:49,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:19:49,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:19:49,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:19:49,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:19:49,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:19:49,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:19:49,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:19:49,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:19:49,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:19:49,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:19:49,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:19:49,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:19:49,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:19:49,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:19:49,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:19:49,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:19:49,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:19:49,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:19:49,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:19:49,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:19:49,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:19:49,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:19:49,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:19:49,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:19:49,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:19:49,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:19:49,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:19:49,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:19:49,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:19:49,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:19:49,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:19:49,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:19:49,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:19:49,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:19:49,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:19:49,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:19:49,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:19:49,386 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:19:49,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:19:49,387 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:19:49,387 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:19:49,387 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:19:49,388 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:19:49,388 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:19:49,388 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:19:49,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:19:49,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:19:49,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:19:49,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:19:49,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:19:49,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:19:49,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:19:49,392 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:19:49,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:19:49,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:19:49,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:19:49,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:19:49,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:19:49,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:19:49,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:19:49,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:19:49,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:19:49,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:19:49,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:19:49,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:19:49,398 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 [2021-11-21 01:19:49,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:19:49,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:19:49,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:19:49,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:19:49,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:19:49,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-21 01:19:49,845 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/data/57acb5732/2bf287296cc24a4080424f85795d09a9/FLAG4550d9c7f [2021-11-21 01:19:50,964 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:19:50,965 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-21 01:19:51,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/data/57acb5732/2bf287296cc24a4080424f85795d09a9/FLAG4550d9c7f [2021-11-21 01:19:51,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/data/57acb5732/2bf287296cc24a4080424f85795d09a9 [2021-11-21 01:19:51,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:19:51,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:19:51,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:19:51,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:19:51,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:19:51,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:19:51" (1/1) ... [2021-11-21 01:19:51,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e76c441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:51, skipping insertion in model container [2021-11-21 01:19:51,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:19:51" (1/1) ... [2021-11-21 01:19:51,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:19:51,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:19:53,817 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_183cf599-debe-4f84-a6d1-dfd97c35a4ac/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-21 01:19:53,885 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-21 01:19:53,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:19:53,971 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:19:54,400 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_183cf599-debe-4f84-a6d1-dfd97c35a4ac/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-21 01:19:54,411 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-21 01:19:54,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:19:54,620 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:19:54,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54 WrapperNode [2021-11-21 01:19:54,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:19:54,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:19:54,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:19:54,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:19:54,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:54,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,013 INFO L137 Inliner]: procedures = 212, calls = 1352, calls flagged for inlining = 108, calls inlined = 105, statements flattened = 3704 [2021-11-21 01:19:55,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:19:55,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:19:55,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:19:55,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:19:55,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:19:55,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:19:55,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:19:55,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:19:55,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (1/1) ... [2021-11-21 01:19:55,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:19:55,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:55,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:19:55,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:19:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-21 01:19:55,537 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-21 01:19:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:19:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:19:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:19:55,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:19:55,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:19:55,538 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:19:55,538 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_sensor_show [2021-11-21 01:19:55,538 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_sensor_show [2021-11-21 01:19:55,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:19:55,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:19:55,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2021-11-21 01:19:55,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2021-11-21 01:19:55,539 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 01:19:55,540 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 01:19:55,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 01:19:55,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 01:19:55,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:19:55,540 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:19:55,541 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:19:55,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:19:55,541 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu_suspend [2021-11-21 01:19:55,541 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu_suspend [2021-11-21 01:19:55,541 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 01:19:55,542 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 01:19:55,543 INFO L130 BoogieDeclarations]: Found specification of procedure iio_trigger_notify_done [2021-11-21 01:19:55,543 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_trigger_notify_done [2021-11-21 01:19:55,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:19:55,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:19:55,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 01:19:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-21 01:19:55,544 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-21 01:19:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_irq_handler [2021-11-21 01:19:55,545 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_irq_handler [2021-11-21 01:19:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 01:19:55,546 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 01:19:55,546 INFO L130 BoogieDeclarations]: Found specification of procedure iio_triggered_buffer_cleanup [2021-11-21 01:19:55,546 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_triggered_buffer_cleanup [2021-11-21 01:19:55,546 INFO L130 BoogieDeclarations]: Found specification of procedure inv_attr_show [2021-11-21 01:19:55,547 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_attr_show [2021-11-21 01:19:55,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:19:55,547 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-21 01:19:55,547 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-21 01:19:55,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:19:55,548 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_remove_trigger [2021-11-21 01:19:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_remove_trigger [2021-11-21 01:19:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-21 01:19:55,550 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-21 01:19:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-21 01:19:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-21 01:19:55,552 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_read_fifo [2021-11-21 01:19:55,552 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_read_fifo [2021-11-21 01:19:55,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:19:55,552 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_set_power_itg [2021-11-21 01:19:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_set_power_itg [2021-11-21 01:19:55,553 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-21 01:19:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-21 01:19:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2021-11-21 01:19:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2021-11-21 01:19:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu_resume [2021-11-21 01:19:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu_resume [2021-11-21 01:19:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:19:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:19:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_switch_engine [2021-11-21 01:19:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_switch_engine [2021-11-21 01:19:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure to_acpi_node [2021-11-21 01:19:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure to_acpi_node [2021-11-21 01:19:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-11-21 01:19:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-11-21 01:19:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 01:19:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 01:19:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure iio_priv [2021-11-21 01:19:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_priv [2021-11-21 01:19:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure iio_device_unregister [2021-11-21 01:19:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_device_unregister [2021-11-21 01:19:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:19:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_2 [2021-11-21 01:19:55,558 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_2 [2021-11-21 01:19:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 01:19:55,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 01:19:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:19:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 01:19:55,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 01:19:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:19:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:19:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-21 01:19:55,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-21 01:19:55,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-11-21 01:19:55,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-11-21 01:19:55,599 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_validate_trigger [2021-11-21 01:19:55,599 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_validate_trigger [2021-11-21 01:19:55,599 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_del_mux_adapter [2021-11-21 01:19:55,599 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_del_mux_adapter [2021-11-21 01:19:55,599 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_i2c_block_data [2021-11-21 01:19:55,599 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_i2c_block_data [2021-11-21 01:19:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_iio_dev [2021-11-21 01:19:55,600 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_iio_dev [2021-11-21 01:19:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure inv_reset_fifo [2021-11-21 01:19:55,600 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_reset_fifo [2021-11-21 01:19:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-21 01:19:55,600 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-21 01:19:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:19:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:19:55,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:19:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_write_reg [2021-11-21 01:19:55,601 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_write_reg [2021-11-21 01:19:56,478 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:19:56,483 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:19:56,701 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:20:33,097 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:20:34,252 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:20:34,253 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:20:34,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:34 BoogieIcfgContainer [2021-11-21 01:20:34,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:20:34,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:20:34,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:20:34,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:20:34,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:19:51" (1/3) ... [2021-11-21 01:20:34,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7781cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:34, skipping insertion in model container [2021-11-21 01:20:34,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:19:54" (2/3) ... [2021-11-21 01:20:34,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7781cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:34, skipping insertion in model container [2021-11-21 01:20:34,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:34" (3/3) ... [2021-11-21 01:20:34,270 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-21 01:20:34,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:20:34,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:20:34,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:20:34,357 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:20:34,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:20:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 777 states, 526 states have (on average 1.44106463878327) internal successors, (758), 541 states have internal predecessors, (758), 205 states have call successors, (205), 45 states have call predecessors, (205), 44 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-21 01:20:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-21 01:20:34,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:34,433 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:34,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1181361072, now seen corresponding path program 1 times [2021-11-21 01:20:34,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:34,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179879009] [2021-11-21 01:20:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:34,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-21 01:20:35,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:35,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179879009] [2021-11-21 01:20:35,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179879009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:35,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:35,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:20:35,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230605764] [2021-11-21 01:20:35,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:35,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:20:35,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:20:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:35,764 INFO L87 Difference]: Start difference. First operand has 777 states, 526 states have (on average 1.44106463878327) internal successors, (758), 541 states have internal predecessors, (758), 205 states have call successors, (205), 45 states have call predecessors, (205), 44 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-21 01:20:37,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:40,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:41,625 INFO L93 Difference]: Finished difference Result 2103 states and 3136 transitions. [2021-11-21 01:20:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:20:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 243 [2021-11-21 01:20:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:41,675 INFO L225 Difference]: With dead ends: 2103 [2021-11-21 01:20:41,675 INFO L226 Difference]: Without dead ends: 1343 [2021-11-21 01:20:41,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:41,694 INFO L933 BasicCegarLoop]: 1161 mSDtfsCounter, 865 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2169 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:41,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2169 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 01:20:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-21 01:20:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1342. [2021-11-21 01:20:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 932 states have (on average 1.4313304721030042) internal successors, (1334), 937 states have internal predecessors, (1334), 328 states have call successors, (328), 82 states have call predecessors, (328), 81 states have return successors, (327), 326 states have call predecessors, (327), 327 states have call successors, (327) [2021-11-21 01:20:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1989 transitions. [2021-11-21 01:20:41,925 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1989 transitions. Word has length 243 [2021-11-21 01:20:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:41,935 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1989 transitions. [2021-11-21 01:20:41,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-21 01:20:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1989 transitions. [2021-11-21 01:20:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-21 01:20:41,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:41,957 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:41,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:20:41,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1184533604, now seen corresponding path program 1 times [2021-11-21 01:20:41,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:41,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217223063] [2021-11-21 01:20:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:41,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-21 01:20:42,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217223063] [2021-11-21 01:20:42,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217223063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:42,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:42,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:20:42,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579230061] [2021-11-21 01:20:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:42,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:20:42,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:20:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:42,709 INFO L87 Difference]: Start difference. First operand 1342 states and 1989 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-21 01:20:44,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:47,081 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:48,420 INFO L93 Difference]: Finished difference Result 2519 states and 3729 transitions. [2021-11-21 01:20:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:20:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 246 [2021-11-21 01:20:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:48,450 INFO L225 Difference]: With dead ends: 2519 [2021-11-21 01:20:48,451 INFO L226 Difference]: Without dead ends: 2514 [2021-11-21 01:20:48,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:48,455 INFO L933 BasicCegarLoop]: 1141 mSDtfsCounter, 883 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:48,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 2075 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-11-21 01:20:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-11-21 01:20:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2513. [2021-11-21 01:20:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 1755 states have (on average 1.4370370370370371) internal successors, (2522), 1764 states have internal predecessors, (2522), 600 states have call successors, (600), 158 states have call predecessors, (600), 157 states have return successors, (599), 596 states have call predecessors, (599), 599 states have call successors, (599) [2021-11-21 01:20:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3721 transitions. [2021-11-21 01:20:48,666 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3721 transitions. Word has length 246 [2021-11-21 01:20:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:48,668 INFO L470 AbstractCegarLoop]: Abstraction has 2513 states and 3721 transitions. [2021-11-21 01:20:48,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-21 01:20:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3721 transitions. [2021-11-21 01:20:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-21 01:20:48,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:48,682 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:48,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:20:48,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 924706173, now seen corresponding path program 1 times [2021-11-21 01:20:48,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:48,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451854705] [2021-11-21 01:20:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:48,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-21 01:20:49,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:49,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451854705] [2021-11-21 01:20:49,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451854705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:49,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:49,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:20:49,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490354488] [2021-11-21 01:20:49,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:49,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:20:49,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:20:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:49,309 INFO L87 Difference]: Start difference. First operand 2513 states and 3721 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 01:20:51,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:54,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:54,796 INFO L93 Difference]: Finished difference Result 7150 states and 10615 transitions. [2021-11-21 01:20:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:20:54,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 275 [2021-11-21 01:20:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:54,841 INFO L225 Difference]: With dead ends: 7150 [2021-11-21 01:20:54,841 INFO L226 Difference]: Without dead ends: 4678 [2021-11-21 01:20:54,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:54,862 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 806 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:54,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2120 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-21 01:20:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-11-21 01:20:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4671. [2021-11-21 01:20:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3291 states have (on average 1.4457611668185961) internal successors, (4758), 3306 states have internal predecessors, (4758), 1094 states have call successors, (1094), 286 states have call predecessors, (1094), 285 states have return successors, (1093), 1088 states have call predecessors, (1093), 1093 states have call successors, (1093) [2021-11-21 01:20:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 6945 transitions. [2021-11-21 01:20:55,178 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 6945 transitions. Word has length 275 [2021-11-21 01:20:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:55,183 INFO L470 AbstractCegarLoop]: Abstraction has 4671 states and 6945 transitions. [2021-11-21 01:20:55,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 01:20:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 6945 transitions. [2021-11-21 01:20:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-21 01:20:55,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:55,206 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:55,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:20:55,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1733748406, now seen corresponding path program 1 times [2021-11-21 01:20:55,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:55,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718715556] [2021-11-21 01:20:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:55,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2021-11-21 01:20:55,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:55,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718715556] [2021-11-21 01:20:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718715556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:55,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:55,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:20:55,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003427465] [2021-11-21 01:20:55,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:55,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:20:55,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:20:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:55,819 INFO L87 Difference]: Start difference. First operand 4671 states and 6945 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:20:57,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:00,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:01,685 INFO L93 Difference]: Finished difference Result 7049 states and 10485 transitions. [2021-11-21 01:21:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:21:01,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 363 [2021-11-21 01:21:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:01,757 INFO L225 Difference]: With dead ends: 7049 [2021-11-21 01:21:01,757 INFO L226 Difference]: Without dead ends: 7044 [2021-11-21 01:21:01,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:21:01,769 INFO L933 BasicCegarLoop]: 1200 mSDtfsCounter, 1039 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:01,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 2135 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 01:21:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7044 states. [2021-11-21 01:21:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7044 to 7041. [2021-11-21 01:21:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 4964 states have (on average 1.4462127316680096) internal successors, (7179), 4988 states have internal predecessors, (7179), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-21 01:21:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10472 transitions. [2021-11-21 01:21:02,326 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10472 transitions. Word has length 363 [2021-11-21 01:21:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:02,328 INFO L470 AbstractCegarLoop]: Abstraction has 7041 states and 10472 transitions. [2021-11-21 01:21:02,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:21:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10472 transitions. [2021-11-21 01:21:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-11-21 01:21:02,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:02,374 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:02,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:21:02,375 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1860719267, now seen corresponding path program 1 times [2021-11-21 01:21:02,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:02,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155928149] [2021-11-21 01:21:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:02,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2212 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2191 trivial. 0 not checked. [2021-11-21 01:21:02,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155928149] [2021-11-21 01:21:02,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155928149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:02,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:02,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:21:02,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268729812] [2021-11-21 01:21:02,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:02,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:21:02,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:21:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:21:02,927 INFO L87 Difference]: Start difference. First operand 7041 states and 10472 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-21 01:21:04,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:08,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:08,725 INFO L93 Difference]: Finished difference Result 14089 states and 21259 transitions. [2021-11-21 01:21:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:21:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 416 [2021-11-21 01:21:08,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:08,806 INFO L225 Difference]: With dead ends: 14089 [2021-11-21 01:21:08,806 INFO L226 Difference]: Without dead ends: 7089 [2021-11-21 01:21:08,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:21:08,844 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 10 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:08,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1992 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-11-21 01:21:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2021-11-21 01:21:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 7065. [2021-11-21 01:21:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 4988 states have (on average 1.444065757818765) internal successors, (7203), 5012 states have internal predecessors, (7203), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-21 01:21:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 10496 transitions. [2021-11-21 01:21:09,497 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 10496 transitions. Word has length 416 [2021-11-21 01:21:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:09,500 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 10496 transitions. [2021-11-21 01:21:09,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-21 01:21:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 10496 transitions. [2021-11-21 01:21:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-21 01:21:09,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:09,563 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:09,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:21:09,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1778118758, now seen corresponding path program 1 times [2021-11-21 01:21:09,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:09,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942084068] [2021-11-21 01:21:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:09,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2193 trivial. 0 not checked. [2021-11-21 01:21:10,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942084068] [2021-11-21 01:21:10,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942084068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:10,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:10,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:10,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568079941] [2021-11-21 01:21:10,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:10,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:21:10,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:21:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:21:10,275 INFO L87 Difference]: Start difference. First operand 7065 states and 10496 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-21 01:21:12,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:16,346 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:18,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:20,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:22,581 INFO L93 Difference]: Finished difference Result 14757 states and 22766 transitions. [2021-11-21 01:21:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:22,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 420 [2021-11-21 01:21:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:22,706 INFO L225 Difference]: With dead ends: 14757 [2021-11-21 01:21:22,706 INFO L226 Difference]: Without dead ends: 12369 [2021-11-21 01:21:22,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:22,734 INFO L933 BasicCegarLoop]: 2466 mSDtfsCounter, 1175 mSDsluCounter, 3619 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 211 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 5701 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:22,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 5701 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 732 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2021-11-21 01:21:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12369 states. [2021-11-21 01:21:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12369 to 7067. [2021-11-21 01:21:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7067 states, 4990 states have (on average 1.4438877755511021) internal successors, (7205), 5014 states have internal predecessors, (7205), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-21 01:21:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7067 states to 7067 states and 10498 transitions. [2021-11-21 01:21:23,454 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 10498 transitions. Word has length 420 [2021-11-21 01:21:23,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:23,456 INFO L470 AbstractCegarLoop]: Abstraction has 7067 states and 10498 transitions. [2021-11-21 01:21:23,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-21 01:21:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 10498 transitions. [2021-11-21 01:21:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-11-21 01:21:23,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:23,505 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:23,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:21:23,506 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1524580602, now seen corresponding path program 1 times [2021-11-21 01:21:23,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:23,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208147720] [2021-11-21 01:21:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:23,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2191 trivial. 0 not checked. [2021-11-21 01:21:24,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208147720] [2021-11-21 01:21:24,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208147720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:21:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800711664] [2021-11-21 01:21:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:24,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:24,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:21:24,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:21:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 4502 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:21:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2183 trivial. 0 not checked. [2021-11-21 01:21:27,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:21:27,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800711664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:27,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:21:27,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-21 01:21:27,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438277779] [2021-11-21 01:21:27,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:27,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:21:27,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:21:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:21:27,380 INFO L87 Difference]: Start difference. First operand 7067 states and 10498 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-21 01:21:29,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:32,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:34,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:36,087 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:38,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:40,096 INFO L93 Difference]: Finished difference Result 19642 states and 30422 transitions. [2021-11-21 01:21:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 428 [2021-11-21 01:21:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:40,180 INFO L225 Difference]: With dead ends: 19642 [2021-11-21 01:21:40,180 INFO L226 Difference]: Without dead ends: 14874 [2021-11-21 01:21:40,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:21:40,212 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 1550 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 174 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 4726 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:40,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1721 Valid, 4726 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 638 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2021-11-21 01:21:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14874 states. [2021-11-21 01:21:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14874 to 7071. [2021-11-21 01:21:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 4994 states have (on average 1.4435322386864238) internal successors, (7209), 5018 states have internal predecessors, (7209), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-21 01:21:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 10502 transitions. [2021-11-21 01:21:40,879 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 10502 transitions. Word has length 428 [2021-11-21 01:21:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:40,880 INFO L470 AbstractCegarLoop]: Abstraction has 7071 states and 10502 transitions. [2021-11-21 01:21:40,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-21 01:21:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 10502 transitions. [2021-11-21 01:21:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-21 01:21:40,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:40,929 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:40,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:21:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:41,153 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2139687374, now seen corresponding path program 1 times [2021-11-21 01:21:41,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:41,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719922415] [2021-11-21 01:21:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:41,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2224 trivial. 0 not checked. [2021-11-21 01:21:42,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:42,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719922415] [2021-11-21 01:21:42,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719922415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:21:42,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717805837] [2021-11-21 01:21:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:42,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:42,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:21:42,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:21:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:43,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 4876 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:21:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2021-11-21 01:21:45,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:21:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717805837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:45,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:21:45,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:21:45,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525736266] [2021-11-21 01:21:45,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:45,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:45,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:21:45,334 INFO L87 Difference]: Start difference. First operand 7071 states and 10502 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-21 01:21:47,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:51,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:54,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:56,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:21:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:57,494 INFO L93 Difference]: Finished difference Result 14488 states and 22106 transitions. [2021-11-21 01:21:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) Word has length 478 [2021-11-21 01:21:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:57,557 INFO L225 Difference]: With dead ends: 14488 [2021-11-21 01:21:57,557 INFO L226 Difference]: Without dead ends: 9716 [2021-11-21 01:21:57,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:21:57,587 INFO L933 BasicCegarLoop]: 1509 mSDtfsCounter, 411 mSDsluCounter, 4629 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 5595 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:57,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 5595 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 763 Invalid, 4 Unknown, 0 Unchecked, 11.8s Time] [2021-11-21 01:21:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9716 states. [2021-11-21 01:21:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9716 to 7079. [2021-11-21 01:21:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 5000 states have (on average 1.443) internal successors, (7215), 5024 states have internal predecessors, (7215), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 431 states have return successors, (1674), 1640 states have call predecessors, (1674), 1646 states have call successors, (1674) [2021-11-21 01:21:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 10536 transitions. [2021-11-21 01:21:58,124 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 10536 transitions. Word has length 478 [2021-11-21 01:21:58,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:58,126 INFO L470 AbstractCegarLoop]: Abstraction has 7079 states and 10536 transitions. [2021-11-21 01:21:58,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-21 01:21:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 10536 transitions. [2021-11-21 01:21:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-21 01:21:58,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:58,170 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:58,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:21:58,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:58,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:58,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1263044046, now seen corresponding path program 2 times [2021-11-21 01:21:58,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:58,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988063639] [2021-11-21 01:21:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:58,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2220 trivial. 0 not checked. [2021-11-21 01:21:59,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:59,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988063639] [2021-11-21 01:21:59,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988063639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:21:59,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646809798] [2021-11-21 01:21:59,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:21:59,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:59,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:21:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_183cf599-debe-4f84-a6d1-dfd97c35a4ac/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process