./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/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_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:11:02,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:11:02,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:11:02,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:11:02,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:11:02,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:11:02,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:11:02,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:11:02,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:11:02,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:11:02,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:11:02,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:11:02,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:11:02,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:11:02,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:11:02,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:11:02,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:11:02,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:11:02,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:11:02,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:11:02,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:11:02,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:11:02,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:11:02,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:11:03,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:11:03,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:11:03,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:11:03,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:11:03,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:11:03,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:11:03,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:11:03,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:11:03,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:11:03,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:11:03,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:11:03,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:11:03,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:11:03,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:11:03,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:11:03,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:11:03,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:11:03,021 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:11:03,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:11:03,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:11:03,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:11:03,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:11:03,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:11:03,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:11:03,069 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:11:03,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:11:03,069 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:11:03,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:11:03,070 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:11:03,071 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:11:03,071 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:11:03,071 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:11:03,071 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:11:03,072 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:11:03,072 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:11:03,072 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:11:03,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:11:03,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:11:03,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:11:03,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:11:03,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:11:03,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:11:03,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:11:03,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:11:03,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:11:03,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:11:03,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:11:03,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:11:03,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:11:03,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:11:03,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:11:03,079 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:11:03,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:11:03,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:11:03,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:11:03,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:11:03,080 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_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 [2021-11-23 02:11:03,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:11:03,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:11:03,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:11:03,452 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:11:03,453 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:11:03,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/../../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 [2021-11-23 02:11:03,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/data/83f93f3d2/c6a74c9791fb43e993d783d8c52324df/FLAGb55a2f4fc [2021-11-23 02:11:04,422 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:11:04,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/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 [2021-11-23 02:11:04,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/data/83f93f3d2/c6a74c9791fb43e993d783d8c52324df/FLAGb55a2f4fc [2021-11-23 02:11:04,880 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/data/83f93f3d2/c6a74c9791fb43e993d783d8c52324df [2021-11-23 02:11:04,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:11:04,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:11:04,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:11:04,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:11:04,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:11:04,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:04" (1/1) ... [2021-11-23 02:11:04,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628a8750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:04, skipping insertion in model container [2021-11-23 02:11:04,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:04" (1/1) ... [2021-11-23 02:11:04,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:11:05,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:11:06,907 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_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/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] [2021-11-23 02:11:06,969 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 02:11:06,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:11:07,045 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:11:07,391 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_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/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] [2021-11-23 02:11:07,401 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 02:11:07,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:11:07,533 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:11:07,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07 WrapperNode [2021-11-23 02:11:07,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:11:07,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:11:07,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:11:07,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:11:07,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:07,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:07,807 INFO L137 Inliner]: procedures = 212, calls = 1352, calls flagged for inlining = 108, calls inlined = 105, statements flattened = 3704 [2021-11-23 02:11:07,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:11:07,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:11:07,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:11:07,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:11:07,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:07,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:07,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:07,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:07,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:08,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:08,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:08,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:11:08,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:11:08,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:11:08,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:11:08,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (1/1) ... [2021-11-23 02:11:08,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:11:08,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:08,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:11:08,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:11:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:11:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:11:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:11:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:11:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:11:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:11:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:11:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:11:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_sensor_show [2021-11-23 02:11:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_sensor_show [2021-11-23 02:11:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:11:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:11:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2021-11-23 02:11:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2021-11-23 02:11:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:11:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:11:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:11:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:11:08,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:11:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:11:08,217 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:11:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:11:08,217 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu_suspend [2021-11-23 02:11:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu_suspend [2021-11-23 02:11:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:11:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:11:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure iio_trigger_notify_done [2021-11-23 02:11:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_trigger_notify_done [2021-11-23 02:11:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:11:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:11:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:11:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:11:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:11:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_irq_handler [2021-11-23 02:11:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_irq_handler [2021-11-23 02:11:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:11:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:11:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure iio_triggered_buffer_cleanup [2021-11-23 02:11:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_triggered_buffer_cleanup [2021-11-23 02:11:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure inv_attr_show [2021-11-23 02:11:08,220 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_attr_show [2021-11-23 02:11:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:11:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-23 02:11:08,220 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-23 02:11:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:11:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_remove_trigger [2021-11-23 02:11:08,221 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_remove_trigger [2021-11-23 02:11:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:11:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:11:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:11:08,223 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:11:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_read_fifo [2021-11-23 02:11:08,223 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_read_fifo [2021-11-23 02:11:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:11:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_set_power_itg [2021-11-23 02:11:08,224 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_set_power_itg [2021-11-23 02:11:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-23 02:11:08,224 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-23 02:11:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2021-11-23 02:11:08,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2021-11-23 02:11:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu_resume [2021-11-23 02:11:08,225 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu_resume [2021-11-23 02:11:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:11:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:11:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_switch_engine [2021-11-23 02:11:08,226 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_switch_engine [2021-11-23 02:11:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure to_acpi_node [2021-11-23 02:11:08,226 INFO L138 BoogieDeclarations]: Found implementation of procedure to_acpi_node [2021-11-23 02:11:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-11-23 02:11:08,226 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-11-23 02:11:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:11:08,226 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:11:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure iio_priv [2021-11-23 02:11:08,227 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_priv [2021-11-23 02:11:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure iio_device_unregister [2021-11-23 02:11:08,228 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_device_unregister [2021-11-23 02:11:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:11:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_2 [2021-11-23 02:11:08,228 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_2 [2021-11-23 02:11:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:11:08,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:11:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:11:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:11:08,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:11:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:11:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:11:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-23 02:11:08,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-23 02:11:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-11-23 02:11:08,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-11-23 02:11:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_validate_trigger [2021-11-23 02:11:08,232 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_validate_trigger [2021-11-23 02:11:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_del_mux_adapter [2021-11-23 02:11:08,232 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_del_mux_adapter [2021-11-23 02:11:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_i2c_block_data [2021-11-23 02:11:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_i2c_block_data [2021-11-23 02:11:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_iio_dev [2021-11-23 02:11:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_iio_dev [2021-11-23 02:11:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure inv_reset_fifo [2021-11-23 02:11:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_reset_fifo [2021-11-23 02:11:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-23 02:11:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-23 02:11:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:11:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:11:08,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:11:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_write_reg [2021-11-23 02:11:08,234 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_write_reg [2021-11-23 02:11:08,969 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:11:08,972 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:11:09,215 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:11:37,545 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:11:38,524 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:11:38,525 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:11:38,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:38 BoogieIcfgContainer [2021-11-23 02:11:38,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:11:38,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:11:38,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:11:38,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:11:38,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:04" (1/3) ... [2021-11-23 02:11:38,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36476108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:38, skipping insertion in model container [2021-11-23 02:11:38,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07" (2/3) ... [2021-11-23 02:11:38,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36476108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:38, skipping insertion in model container [2021-11-23 02:11:38,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:38" (3/3) ... [2021-11-23 02:11:38,546 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 [2021-11-23 02:11:38,557 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:11:38,558 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:11:38,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:11:38,630 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:11:38,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:11:38,676 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) [2021-11-23 02:11:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-23 02:11:38,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:38,721 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] [2021-11-23 02:11:38,721 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:38,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1181361072, now seen corresponding path program 1 times [2021-11-23 02:11:38,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:38,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759112866] [2021-11-23 02:11:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:38,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-23 02:11:39,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:39,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759112866] [2021-11-23 02:11:39,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759112866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:39,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:39,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:39,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53211919] [2021-11-23 02:11:39,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:39,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:39,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:39,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:39,769 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) [2021-11-23 02:11:41,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:44,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:45,148 INFO L93 Difference]: Finished difference Result 2103 states and 3136 transitions. [2021-11-23 02:11:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:45,150 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 [2021-11-23 02:11:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:45,178 INFO L225 Difference]: With dead ends: 2103 [2021-11-23 02:11:45,178 INFO L226 Difference]: Without dead ends: 1343 [2021-11-23 02:11:45,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:45,195 INFO L933 BasicCegarLoop]: 1161 mSDtfsCounter, 865 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s 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, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:45,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2169 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 02:11:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-23 02:11:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1342. [2021-11-23 02:11:45,342 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) [2021-11-23 02:11:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1989 transitions. [2021-11-23 02:11:45,357 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1989 transitions. Word has length 243 [2021-11-23 02:11:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1989 transitions. [2021-11-23 02:11:45,359 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) [2021-11-23 02:11:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1989 transitions. [2021-11-23 02:11:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-23 02:11:45,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:45,367 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] [2021-11-23 02:11:45,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:11:45,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:45,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1184533604, now seen corresponding path program 1 times [2021-11-23 02:11:45,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277084142] [2021-11-23 02:11:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:45,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-23 02:11:45,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:45,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277084142] [2021-11-23 02:11:45,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277084142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:45,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:45,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:45,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615443535] [2021-11-23 02:11:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:45,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:45,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:45,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:45,771 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) [2021-11-23 02:11:47,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:50,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:51,336 INFO L93 Difference]: Finished difference Result 2641 states and 3916 transitions. [2021-11-23 02:11:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:51,337 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 [2021-11-23 02:11:51,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:51,359 INFO L225 Difference]: With dead ends: 2641 [2021-11-23 02:11:51,360 INFO L226 Difference]: Without dead ends: 2636 [2021-11-23 02:11:51,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:51,363 INFO L933 BasicCegarLoop]: 1200 mSDtfsCounter, 1069 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:51,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 2135 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 02:11:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-11-23 02:11:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2633. [2021-11-23 02:11:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 1837 states have (on average 1.4360370168753402) internal successors, (2638), 1848 states have internal predecessors, (2638), 634 states have call successors, (634), 162 states have call predecessors, (634), 161 states have return successors, (633), 630 states have call predecessors, (633), 633 states have call successors, (633) [2021-11-23 02:11:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 3905 transitions. [2021-11-23 02:11:51,524 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 3905 transitions. Word has length 246 [2021-11-23 02:11:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:51,529 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 3905 transitions. [2021-11-23 02:11:51,530 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) [2021-11-23 02:11:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 3905 transitions. [2021-11-23 02:11:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-23 02:11:51,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:51,547 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 3, 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] [2021-11-23 02:11:51,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:11:51,547 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2115796420, now seen corresponding path program 1 times [2021-11-23 02:11:51,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:51,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181556449] [2021-11-23 02:11:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:51,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1132 trivial. 0 not checked. [2021-11-23 02:11:51,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181556449] [2021-11-23 02:11:51,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181556449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:51,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:51,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:51,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114336630] [2021-11-23 02:11:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:51,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:52,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:52,001 INFO L87 Difference]: Start difference. First operand 2633 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:11:54,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:56,841 INFO L93 Difference]: Finished difference Result 7390 states and 10983 transitions. [2021-11-23 02:11:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 328 [2021-11-23 02:11:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:56,880 INFO L225 Difference]: With dead ends: 7390 [2021-11-23 02:11:56,881 INFO L226 Difference]: Without dead ends: 4798 [2021-11-23 02:11:56,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:56,897 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 806 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:56,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2120 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 02:11:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-11-23 02:11:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4791. [2021-11-23 02:11:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 3373 states have (on average 1.445004447079751) internal successors, (4874), 3390 states have internal predecessors, (4874), 1128 states have call successors, (1128), 290 states have call predecessors, (1128), 289 states have return successors, (1127), 1122 states have call predecessors, (1127), 1127 states have call successors, (1127) [2021-11-23 02:11:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 7129 transitions. [2021-11-23 02:11:57,161 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 7129 transitions. Word has length 328 [2021-11-23 02:11:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:57,162 INFO L470 AbstractCegarLoop]: Abstraction has 4791 states and 7129 transitions. [2021-11-23 02:11:57,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:11:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 7129 transitions. [2021-11-23 02:11:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-11-23 02:11:57,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:57,186 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] [2021-11-23 02:11:57,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:11:57,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1860719267, now seen corresponding path program 1 times [2021-11-23 02:11:57,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:57,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946410947] [2021-11-23 02:11:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:57,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2212 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2191 trivial. 0 not checked. [2021-11-23 02:11:57,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:57,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946410947] [2021-11-23 02:11:57,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946410947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:57,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:57,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:57,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608606658] [2021-11-23 02:11:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:57,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:57,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:57,612 INFO L87 Difference]: Start difference. First operand 4791 states and 7129 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) [2021-11-23 02:11:59,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:02,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:04,355 INFO L93 Difference]: Finished difference Result 9573 states and 14453 transitions. [2021-11-23 02:12:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:04,356 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 [2021-11-23 02:12:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:04,397 INFO L225 Difference]: With dead ends: 9573 [2021-11-23 02:12:04,397 INFO L226 Difference]: Without dead ends: 4823 [2021-11-23 02:12:04,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:04,419 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 10 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:04,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1994 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-23 02:12:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-11-23 02:12:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 4807. [2021-11-23 02:12:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4807 states, 3389 states have (on average 1.4429035113602833) internal successors, (4890), 3406 states have internal predecessors, (4890), 1128 states have call successors, (1128), 290 states have call predecessors, (1128), 289 states have return successors, (1127), 1122 states have call predecessors, (1127), 1127 states have call successors, (1127) [2021-11-23 02:12:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4807 states to 4807 states and 7145 transitions. [2021-11-23 02:12:04,674 INFO L78 Accepts]: Start accepts. Automaton has 4807 states and 7145 transitions. Word has length 416 [2021-11-23 02:12:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:04,675 INFO L470 AbstractCegarLoop]: Abstraction has 4807 states and 7145 transitions. [2021-11-23 02:12:04,675 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) [2021-11-23 02:12:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4807 states and 7145 transitions. [2021-11-23 02:12:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-23 02:12:04,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:04,698 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] [2021-11-23 02:12:04,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:12:04,699 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1778118758, now seen corresponding path program 1 times [2021-11-23 02:12:04,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500763297] [2021-11-23 02:12:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:04,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2193 trivial. 0 not checked. [2021-11-23 02:12:05,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500763297] [2021-11-23 02:12:05,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500763297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:05,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:05,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:12:05,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560340520] [2021-11-23 02:12:05,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:05,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:12:05,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:12:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:12:05,204 INFO L87 Difference]: Start difference. First operand 4807 states and 7145 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) [2021-11-23 02:12:07,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:09,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:11,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:13,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:16,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:18,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:19,723 INFO L93 Difference]: Finished difference Result 12499 states and 19415 transitions. [2021-11-23 02:12:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:12:19,724 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 [2021-11-23 02:12:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:19,807 INFO L225 Difference]: With dead ends: 12499 [2021-11-23 02:12:19,807 INFO L226 Difference]: Without dead ends: 10111 [2021-11-23 02:12:19,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:19,825 INFO L933 BasicCegarLoop]: 2518 mSDtfsCounter, 1124 mSDsluCounter, 3641 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 211 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 5775 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:19,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1325 Valid, 5775 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 740 Invalid, 5 Unknown, 0 Unchecked, 14.2s Time] [2021-11-23 02:12:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10111 states. [2021-11-23 02:12:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10111 to 4809. [2021-11-23 02:12:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 3391 states have (on average 1.4426422884104984) internal successors, (4892), 3408 states have internal predecessors, (4892), 1128 states have call successors, (1128), 290 states have call predecessors, (1128), 289 states have return successors, (1127), 1122 states have call predecessors, (1127), 1127 states have call successors, (1127) [2021-11-23 02:12:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 7147 transitions. [2021-11-23 02:12:20,308 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 7147 transitions. Word has length 420 [2021-11-23 02:12:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:20,311 INFO L470 AbstractCegarLoop]: Abstraction has 4809 states and 7147 transitions. [2021-11-23 02:12:20,312 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) [2021-11-23 02:12:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 7147 transitions. [2021-11-23 02:12:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-11-23 02:12:20,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:20,339 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] [2021-11-23 02:12:20,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:12:20,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1524580602, now seen corresponding path program 1 times [2021-11-23 02:12:20,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:20,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951515117] [2021-11-23 02:12:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:20,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2191 trivial. 0 not checked. [2021-11-23 02:12:21,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951515117] [2021-11-23 02:12:21,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951515117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471061830] [2021-11-23 02:12:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:21,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:21,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:21,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:12:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 4502 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:12:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2183 trivial. 0 not checked. [2021-11-23 02:12:23,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:23,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471061830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:23,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:12:23,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-23 02:12:23,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737706435] [2021-11-23 02:12:23,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:23,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:12:23,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:12:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:12:23,163 INFO L87 Difference]: Start difference. First operand 4809 states and 7147 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) [2021-11-23 02:12:25,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:28,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:29,874 INFO L93 Difference]: Finished difference Result 17384 states and 27071 transitions. [2021-11-23 02:12:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:12:29,875 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 [2021-11-23 02:12:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:29,958 INFO L225 Difference]: With dead ends: 17384 [2021-11-23 02:12:29,959 INFO L226 Difference]: Without dead ends: 12616 [2021-11-23 02:12:29,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:29,984 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 1521 mSDsluCounter, 3427 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 174 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 4803 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:29,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 4803 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 638 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 02:12:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2021-11-23 02:12:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 4813. [2021-11-23 02:12:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 3395 states have (on average 1.442120765832106) internal successors, (4896), 3412 states have internal predecessors, (4896), 1128 states have call successors, (1128), 290 states have call predecessors, (1128), 289 states have return successors, (1127), 1122 states have call predecessors, (1127), 1127 states have call successors, (1127) [2021-11-23 02:12:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 7151 transitions. [2021-11-23 02:12:30,463 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 7151 transitions. Word has length 428 [2021-11-23 02:12:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:30,464 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 7151 transitions. [2021-11-23 02:12:30,464 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) [2021-11-23 02:12:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 7151 transitions. [2021-11-23 02:12:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-11-23 02:12:30,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:30,495 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:30,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:30,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:12:30,722 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1225855886, now seen corresponding path program 1 times [2021-11-23 02:12:30,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:30,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892129441] [2021-11-23 02:12:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:30,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2234 trivial. 0 not checked. [2021-11-23 02:12:31,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:31,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892129441] [2021-11-23 02:12:31,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892129441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:31,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124010263] [2021-11-23 02:12:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:31,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:31,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:31,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:12:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 4949 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:12:32,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2204 trivial. 0 not checked. [2021-11-23 02:12:33,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:33,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124010263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:33,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:12:33,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-23 02:12:33,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335688610] [2021-11-23 02:12:33,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:33,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:33,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:33,786 INFO L87 Difference]: Start difference. First operand 4813 states and 7151 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-11-23 02:12:35,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:38,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:41,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:42,413 INFO L93 Difference]: Finished difference Result 12222 states and 18711 transitions. [2021-11-23 02:12:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:12:42,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 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 480 [2021-11-23 02:12:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:42,446 INFO L225 Difference]: With dead ends: 12222 [2021-11-23 02:12:42,447 INFO L226 Difference]: Without dead ends: 7450 [2021-11-23 02:12:42,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:42,467 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 411 mSDsluCounter, 4621 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 5585 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:42,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 5585 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 760 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2021-11-23 02:12:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7450 states. [2021-11-23 02:12:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7450 to 4821. [2021-11-23 02:12:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4821 states, 3401 states have (on average 1.441340782122905) internal successors, (4902), 3418 states have internal predecessors, (4902), 1128 states have call successors, (1128), 290 states have call predecessors, (1128), 291 states have return successors, (1155), 1124 states have call predecessors, (1155), 1127 states have call successors, (1155) [2021-11-23 02:12:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4821 states to 4821 states and 7185 transitions. [2021-11-23 02:12:42,750 INFO L78 Accepts]: Start accepts. Automaton has 4821 states and 7185 transitions. Word has length 480 [2021-11-23 02:12:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:42,751 INFO L470 AbstractCegarLoop]: Abstraction has 4821 states and 7185 transitions. [2021-11-23 02:12:42,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-11-23 02:12:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4821 states and 7185 transitions. [2021-11-23 02:12:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-23 02:12:42,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:42,776 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] [2021-11-23 02:12:42,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:42,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:42,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2139687374, now seen corresponding path program 1 times [2021-11-23 02:12:42,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:42,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813589594] [2021-11-23 02:12:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:42,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2224 trivial. 0 not checked. [2021-11-23 02:12:43,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:43,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813589594] [2021-11-23 02:12:43,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813589594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:43,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321558787] [2021-11-23 02:12:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:43,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:43,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:43,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:12:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:44,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 4876 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:12:44,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2021-11-23 02:12:45,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:45,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321558787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:45,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:12:45,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-23 02:12:45,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805621134] [2021-11-23 02:12:45,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:45,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:45,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:45,694 INFO L87 Difference]: Start difference. First operand 4821 states and 7185 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) [2021-11-23 02:12:47,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:50,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:52,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:53,965 INFO L93 Difference]: Finished difference Result 12234 states and 18749 transitions. [2021-11-23 02:12:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:12:53,966 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 [2021-11-23 02:12:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:54,000 INFO L225 Difference]: With dead ends: 12234 [2021-11-23 02:12:54,000 INFO L226 Difference]: Without dead ends: 7454 [2021-11-23 02:12:54,086 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 [2021-11-23 02:12:54,092 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 411 mSDsluCounter, 4621 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 5585 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:54,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 5585 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 760 Invalid, 3 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 02:12:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7454 states. [2021-11-23 02:12:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7454 to 4825. [2021-11-23 02:12:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 3405 states have (on average 1.4408223201174744) internal successors, (4906), 3420 states have internal predecessors, (4906), 1128 states have call successors, (1128), 290 states have call predecessors, (1128), 291 states have return successors, (1155), 1126 states have call predecessors, (1155), 1127 states have call successors, (1155) [2021-11-23 02:12:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 7189 transitions. [2021-11-23 02:12:54,361 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 7189 transitions. Word has length 478 [2021-11-23 02:12:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:54,362 INFO L470 AbstractCegarLoop]: Abstraction has 4825 states and 7189 transitions. [2021-11-23 02:12:54,362 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) [2021-11-23 02:12:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 7189 transitions. [2021-11-23 02:12:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-23 02:12:54,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:54,380 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] [2021-11-23 02:12:54,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:54,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:54,606 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1263044046, now seen corresponding path program 2 times [2021-11-23 02:12:54,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:54,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964417315] [2021-11-23 02:12:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:54,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2220 trivial. 0 not checked. [2021-11-23 02:12:55,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964417315] [2021-11-23 02:12:55,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964417315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810838497] [2021-11-23 02:12:55,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:12:55,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:55,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:55,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:55,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e56535-cbf3-4e9b-8fae-b3dde5bd1370/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process