./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-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS --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 66bf0b457d4d5112c0b99aeef3b038fb34481370a385df3d77d1a982d2cba2ad --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:27:35,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:27:35,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:27:35,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:27:35,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:27:35,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:27:35,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:27:35,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:27:35,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:27:35,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:27:35,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:27:35,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:27:35,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:27:35,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:27:35,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:27:35,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:27:35,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:27:35,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:27:35,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:27:35,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:27:35,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:27:35,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:27:35,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:27:35,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:27:35,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:27:35,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:27:35,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:27:35,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:27:35,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:27:35,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:27:35,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:27:35,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:27:35,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:27:35,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:27:35,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:27:35,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:27:35,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:27:35,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:27:35,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:27:35,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:27:35,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:27:35,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:27:35,918 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:27:35,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:27:35,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:27:35,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:27:35,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:27:35,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:27:35,921 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:27:35,921 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:27:35,921 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:27:35,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:27:35,922 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:27:35,922 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:27:35,922 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:27:35,923 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:27:35,923 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:27:35,923 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:27:35,924 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:27:35,924 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:27:35,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:27:35,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:27:35,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:27:35,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:27:35,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:27:35,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:27:35,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:27:35,927 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:27:35,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:27:35,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:27:35,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:27:35,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:27:35,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:27:35,929 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:27:35,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:27:35,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:27:35,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:27:35,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:27:35,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:27:35,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:27:35,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66bf0b457d4d5112c0b99aeef3b038fb34481370a385df3d77d1a982d2cba2ad [2022-11-19 08:27:36,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:27:36,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:27:36,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:27:36,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:27:36,185 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:27:36,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i [2022-11-19 08:27:36,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/data/e28656f2a/57dbead6adba45ec8bee28ff9f6b7df2/FLAGcbe3d69ac [2022-11-19 08:27:37,142 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:27:37,143 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i [2022-11-19 08:27:37,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/data/e28656f2a/57dbead6adba45ec8bee28ff9f6b7df2/FLAGcbe3d69ac [2022-11-19 08:27:37,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/data/e28656f2a/57dbead6adba45ec8bee28ff9f6b7df2 [2022-11-19 08:27:37,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:27:37,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:27:37,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:27:37,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:27:37,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:27:37,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:27:37" (1/1) ... [2022-11-19 08:27:37,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64661da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:37, skipping insertion in model container [2022-11-19 08:27:37,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:27:37" (1/1) ... [2022-11-19 08:27:37,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:27:37,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:27:41,193 WARN L234 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_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i[348806,348819] [2022-11-19 08:27:41,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:27:41,556 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:27:42,183 WARN L234 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_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i[348806,348819] [2022-11-19 08:27:42,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:27:42,415 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:27:42,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42 WrapperNode [2022-11-19 08:27:42,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:27:42,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:27:42,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:27:42,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:27:42,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:42,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:42,776 INFO L138 Inliner]: procedures = 566, calls = 3599, calls flagged for inlining = 221, calls inlined = 180, statements flattened = 6302 [2022-11-19 08:27:42,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:27:42,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:27:42,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:27:42,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:27:42,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:42,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:42,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:42,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:43,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:43,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:43,127 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:43,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:43,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:27:43,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:27:43,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:27:43,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:27:43,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (1/1) ... [2022-11-19 08:27:43,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:27:43,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:43,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:27:43,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:27:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 08:27:43,282 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 08:27:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure bio_endio [2022-11-19 08:27:43,282 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_endio [2022-11-19 08:27:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-19 08:27:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-19 08:27:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_create [2022-11-19 08:27:43,284 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_create [2022-11-19 08:27:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 08:27:43,284 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 08:27:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure __disable_intr [2022-11-19 08:27:43,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __disable_intr [2022-11-19 08:27:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_hw_buffers_init [2022-11-19 08:27:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_hw_buffers_init [2022-11-19 08:27:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2022-11-19 08:27:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2022-11-19 08:27:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure config_data_crc32 [2022-11-19 08:27:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure config_data_crc32 [2022-11-19 08:27:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:27:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:27:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_configure [2022-11-19 08:27:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_configure [2022-11-19 08:27:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-19 08:27:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-19 08:27:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure creg_queue_cmd [2022-11-19 08:27:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure creg_queue_cmd [2022-11-19 08:27:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_cleanup_dma_queue [2022-11-19 08:27:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_cleanup_dma_queue [2022-11-19 08:27:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_free_dma [2022-11-19 08:27:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_free_dma [2022-11-19 08:27:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_3 [2022-11-19 08:27:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_3 [2022-11-19 08:27:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 08:27:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 08:27:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure queue_flag_set_unlocked [2022-11-19 08:27:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_flag_set_unlocked [2022-11-19 08:27:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_cancel [2022-11-19 08:27:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_cancel [2022-11-19 08:27:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2022-11-19 08:27:43,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2022-11-19 08:27:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dev_cleanup [2022-11-19 08:27:43,289 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dev_cleanup [2022-11-19 08:27:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_get_card_state [2022-11-19 08:27:43,289 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_get_card_state [2022-11-19 08:27:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 08:27:43,290 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 08:27:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure ssleep [2022-11-19 08:27:43,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ssleep [2022-11-19 08:27:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_cram_write [2022-11-19 08:27:43,292 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_cram_write [2022-11-19 08:27:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-19 08:27:43,293 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-19 08:27:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2022-11-19 08:27:43,293 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2022-11-19 08:27:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 08:27:43,293 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 08:27:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure config_data_swab [2022-11-19 08:27:43,293 INFO L138 BoogieDeclarations]: Found implementation of procedure config_data_swab [2022-11-19 08:27:43,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:27:43,294 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_remove [2022-11-19 08:27:43,294 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_remove [2022-11-19 08:27:43,294 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_issue_card_cmd [2022-11-19 08:27:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_issue_card_cmd [2022-11-19 08:27:43,295 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2022-11-19 08:27:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2022-11-19 08:27:43,295 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-19 08:27:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-19 08:27:43,295 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-19 08:27:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-19 08:27:43,296 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_detach_dev [2022-11-19 08:27:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_detach_dev [2022-11-19 08:27:43,296 INFO L130 BoogieDeclarations]: Found specification of procedure CR_INTR_DMA [2022-11-19 08:27:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure CR_INTR_DMA [2022-11-19 08:27:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 08:27:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 08:27:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure push_tracker [2022-11-19 08:27:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure push_tracker [2022-11-19 08:27:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-19 08:27:43,298 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-19 08:27:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:27:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 08:27:43,298 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 08:27:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 08:27:43,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 08:27:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:27:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:27:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_6 [2022-11-19 08:27:43,300 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_6 [2022-11-19 08:27:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_trylock_reset_lock_of_NOT_ARG_SIGN [2022-11-19 08:27:43,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_trylock_reset_lock_of_NOT_ARG_SIGN [2022-11-19 08:27:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure CREG_DATA [2022-11-19 08:27:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure CREG_DATA [2022-11-19 08:27:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2022-11-19 08:27:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2022-11-19 08:27:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2022-11-19 08:27:43,303 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2022-11-19 08:27:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-19 08:27:43,303 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-19 08:27:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-19 08:27:43,303 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-19 08:27:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc [2022-11-19 08:27:43,304 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_alloc [2022-11-19 08:27:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure card_event_handler [2022-11-19 08:27:43,304 INFO L138 BoogieDeclarations]: Found implementation of procedure card_event_handler [2022-11-19 08:27:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-19 08:27:43,304 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-19 08:27:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-19 08:27:43,305 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-19 08:27:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 08:27:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 08:27:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2022-11-19 08:27:43,309 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2022-11-19 08:27:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_creg_write [2022-11-19 08:27:43,309 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_creg_write [2022-11-19 08:27:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:27:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_6 [2022-11-19 08:27:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_6 [2022-11-19 08:27:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2022-11-19 08:27:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2022-11-19 08:27:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-19 08:27:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-19 08:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_6 [2022-11-19 08:27:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_6 [2022-11-19 08:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 08:27:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 08:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure blk_cleanup_queue [2022-11-19 08:27:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_cleanup_queue [2022-11-19 08:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure dma_intr_coal_val [2022-11-19 08:27:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_intr_coal_val [2022-11-19 08:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-19 08:27:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-19 08:27:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_pci_remove [2022-11-19 08:27:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_pci_remove [2022-11-19 08:27:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure __list_splice [2022-11-19 08:27:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_splice [2022-11-19 08:27:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-19 08:27:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-19 08:27:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-19 08:27:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-19 08:27:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-19 08:27:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-19 08:27:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_destroy [2022-11-19 08:27:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_destroy [2022-11-19 08:27:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_queue_reset [2022-11-19 08:27:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_queue_reset [2022-11-19 08:27:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure __issue_creg_rw [2022-11-19 08:27:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __issue_creg_rw [2022-11-19 08:27:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_dev_lock_of_rsxx_cardinfo [2022-11-19 08:27:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_dev_lock_of_rsxx_cardinfo [2022-11-19 08:27:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:27:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:27:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-19 08:27:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-19 08:27:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-19 08:27:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-19 08:27:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:27:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:27:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:27:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:27:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_creg_read [2022-11-19 08:27:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_creg_read [2022-11-19 08:27:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_reset_lock_of_NOT_ARG_SIGN [2022-11-19 08:27:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_reset_lock_of_NOT_ARG_SIGN [2022-11-19 08:27:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2022-11-19 08:27:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2022-11-19 08:27:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2022-11-19 08:27:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2022-11-19 08:27:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2022-11-19 08:27:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2022-11-19 08:27:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2022-11-19 08:27:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2022-11-19 08:27:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_dev_lock_of_rsxx_cardinfo [2022-11-19 08:27:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_dev_lock_of_rsxx_cardinfo [2022-11-19 08:27:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_trylock [2022-11-19 08:27:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_trylock [2022-11-19 08:27:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_9 [2022-11-19 08:27:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_9 [2022-11-19 08:27:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 08:27:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 08:27:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:27:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:27:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2022-11-19 08:27:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2022-11-19 08:27:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_complete_dma [2022-11-19 08:27:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_complete_dma [2022-11-19 08:27:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-19 08:27:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-19 08:27:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 08:27:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 08:27:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:27:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:27:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR_OR_NULL [2022-11-19 08:27:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR_OR_NULL [2022-11-19 08:27:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-19 08:27:43,402 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-19 08:27:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_eeh_failure [2022-11-19 08:27:43,402 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_eeh_failure [2022-11-19 08:27:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure card_shutdown [2022-11-19 08:27:43,402 INFO L138 BoogieDeclarations]: Found implementation of procedure card_shutdown [2022-11-19 08:27:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-19 08:27:43,405 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-19 08:27:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:27:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 08:27:43,405 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 08:27:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2022-11-19 08:27:43,406 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2022-11-19 08:27:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:27:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_reg_access [2022-11-19 08:27:43,406 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_reg_access [2022-11-19 08:27:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_3 [2022-11-19 08:27:43,406 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_3 [2022-11-19 08:27:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:27:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure creg_kick_queue [2022-11-19 08:27:43,407 INFO L138 BoogieDeclarations]: Found implementation of procedure creg_kick_queue [2022-11-19 08:27:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_3 [2022-11-19 08:27:43,407 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_3 [2022-11-19 08:27:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-19 08:27:43,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-19 08:27:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 08:27:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 08:27:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-19 08:27:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-19 08:27:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-19 08:27:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-19 08:27:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_cleanup [2022-11-19 08:27:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_cleanup [2022-11-19 08:27:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-19 08:27:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-19 08:27:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-19 08:27:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-19 08:27:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-19 08:27:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-19 08:27:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2022-11-19 08:27:43,410 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2022-11-19 08:27:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_6 [2022-11-19 08:27:43,411 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_6 [2022-11-19 08:27:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2022-11-19 08:27:43,414 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2022-11-19 08:27:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_pci_shutdown [2022-11-19 08:27:43,415 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_pci_shutdown [2022-11-19 08:27:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure issue_creg_rw [2022-11-19 08:27:43,415 INFO L138 BoogieDeclarations]: Found implementation of procedure issue_creg_rw [2022-11-19 08:27:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_card_state_to_str [2022-11-19 08:27:43,417 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_card_state_to_str [2022-11-19 08:27:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2022-11-19 08:27:43,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2022-11-19 08:27:43,422 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_disable_ier [2022-11-19 08:27:43,423 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_disable_ier [2022-11-19 08:27:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:27:43,423 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:27:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_file [2022-11-19 08:27:43,423 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_file [2022-11-19 08:27:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:27:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-19 08:27:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-19 08:27:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2022-11-19 08:27:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2022-11-19 08:27:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_disable_ier_and_isr [2022-11-19 08:27:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_disable_ier_and_isr [2022-11-19 08:27:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-19 08:27:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-19 08:27:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:27:43,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:27:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_destroy [2022-11-19 08:27:43,425 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_destroy [2022-11-19 08:27:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure get_tracker_dma [2022-11-19 08:27:43,425 INFO L138 BoogieDeclarations]: Found implementation of procedure get_tracker_dma [2022-11-19 08:27:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 08:27:43,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 08:27:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-19 08:27:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-19 08:27:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure creg_cmd_done [2022-11-19 08:27:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure creg_cmd_done [2022-11-19 08:27:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2022-11-19 08:27:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2022-11-19 08:27:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-19 08:27:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-19 08:27:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_enable_ier_and_isr [2022-11-19 08:27:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_enable_ier_and_isr [2022-11-19 08:27:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-19 08:27:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-19 08:27:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_get_card_size8 [2022-11-19 08:27:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_get_card_size8 [2022-11-19 08:27:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_early_9 [2022-11-19 08:27:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_early_9 [2022-11-19 08:27:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-11-19 08:27:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ffs [2022-11-19 08:27:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_read_hw_log [2022-11-19 08:27:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_read_hw_log [2022-11-19 08:27:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_3 [2022-11-19 08:27:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_3 [2022-11-19 08:27:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2022-11-19 08:27:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2022-11-19 08:27:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-19 08:27:43,429 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-19 08:27:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_free [2022-11-19 08:27:43,429 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_free [2022-11-19 08:27:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 08:27:43,429 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 08:27:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2022-11-19 08:27:43,430 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2022-11-19 08:27:43,430 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_size [2022-11-19 08:27:43,430 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_size [2022-11-19 08:27:43,430 INFO L130 BoogieDeclarations]: Found specification of procedure __enable_intr [2022-11-19 08:27:43,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __enable_intr [2022-11-19 08:27:43,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:27:43,430 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2022-11-19 08:27:43,430 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2022-11-19 08:27:44,376 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:27:44,380 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:27:44,488 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:27:54,594 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:27:56,187 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:27:56,187 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:27:56,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:27:56 BoogieIcfgContainer [2022-11-19 08:27:56,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:27:56,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:27:56,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:27:56,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:27:56,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:27:37" (1/3) ... [2022-11-19 08:27:56,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1861f143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:27:56, skipping insertion in model container [2022-11-19 08:27:56,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:42" (2/3) ... [2022-11-19 08:27:56,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1861f143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:27:56, skipping insertion in model container [2022-11-19 08:27:56,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:27:56" (3/3) ... [2022-11-19 08:27:56,205 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i [2022-11-19 08:27:56,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:27:56,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:27:56,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:27:56,320 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7ea186b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:27:56,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:27:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 1763 states, 1064 states have (on average 1.324248120300752) internal successors, (1409), 1112 states have internal predecessors, (1409), 551 states have call successors, (551), 147 states have call predecessors, (551), 146 states have return successors, (540), 538 states have call predecessors, (540), 540 states have call successors, (540) [2022-11-19 08:27:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-19 08:27:56,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:56,352 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:56,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:56,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1653356434, now seen corresponding path program 1 times [2022-11-19 08:27:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:56,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610174262] [2022-11-19 08:27:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:56,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:27:57,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:57,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610174262] [2022-11-19 08:27:57,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610174262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:57,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:27:57,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:27:57,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161939577] [2022-11-19 08:27:57,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:57,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:27:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:27:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:27:57,578 INFO L87 Difference]: Start difference. First operand has 1763 states, 1064 states have (on average 1.324248120300752) internal successors, (1409), 1112 states have internal predecessors, (1409), 551 states have call successors, (551), 147 states have call predecessors, (551), 146 states have return successors, (540), 538 states have call predecessors, (540), 540 states have call successors, (540) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 08:27:59,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:01,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:04,677 INFO L93 Difference]: Finished difference Result 4444 states and 6321 transitions. [2022-11-19 08:28:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 223 [2022-11-19 08:28:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:04,733 INFO L225 Difference]: With dead ends: 4444 [2022-11-19 08:28:04,733 INFO L226 Difference]: Without dead ends: 2689 [2022-11-19 08:28:04,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:04,755 INFO L413 NwaCegarLoop]: 2550 mSDtfsCounter, 1358 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 4667 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:04,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1360 Valid, 4667 Invalid, 595 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 590 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 08:28:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2022-11-19 08:28:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2673. [2022-11-19 08:28:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 1650 states have (on average 1.3151515151515152) internal successors, (2170), 1695 states have internal predecessors, (2170), 779 states have call successors, (779), 244 states have call predecessors, (779), 243 states have return successors, (769), 765 states have call predecessors, (769), 769 states have call successors, (769) [2022-11-19 08:28:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 3718 transitions. [2022-11-19 08:28:05,010 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 3718 transitions. Word has length 223 [2022-11-19 08:28:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:05,017 INFO L495 AbstractCegarLoop]: Abstraction has 2673 states and 3718 transitions. [2022-11-19 08:28:05,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 08:28:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 3718 transitions. [2022-11-19 08:28:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-19 08:28:05,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:05,034 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:05,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:28:05,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1277142358, now seen corresponding path program 1 times [2022-11-19 08:28:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:05,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466995689] [2022-11-19 08:28:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:28:05,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:05,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466995689] [2022-11-19 08:28:05,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466995689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:05,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:05,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:05,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21314818] [2022-11-19 08:28:05,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:05,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:05,870 INFO L87 Difference]: Start difference. First operand 2673 states and 3718 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:07,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:10,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:12,208 INFO L93 Difference]: Finished difference Result 2890 states and 3978 transitions. [2022-11-19 08:28:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 232 [2022-11-19 08:28:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:12,232 INFO L225 Difference]: With dead ends: 2890 [2022-11-19 08:28:12,232 INFO L226 Difference]: Without dead ends: 2886 [2022-11-19 08:28:12,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:12,236 INFO L413 NwaCegarLoop]: 2320 mSDtfsCounter, 2256 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 2654 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:12,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 2654 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 347 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-19 08:28:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-11-19 08:28:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2884. [2022-11-19 08:28:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 1783 states have (on average 1.313516545148626) internal successors, (2342), 1829 states have internal predecessors, (2342), 819 states have call successors, (819), 282 states have call predecessors, (819), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-19 08:28:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 3972 transitions. [2022-11-19 08:28:12,442 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 3972 transitions. Word has length 232 [2022-11-19 08:28:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:12,445 INFO L495 AbstractCegarLoop]: Abstraction has 2884 states and 3972 transitions. [2022-11-19 08:28:12,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 3972 transitions. [2022-11-19 08:28:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-19 08:28:12,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:12,454 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:12,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:28:12,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -937558486, now seen corresponding path program 1 times [2022-11-19 08:28:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:12,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85748136] [2022-11-19 08:28:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:28:13,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:13,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85748136] [2022-11-19 08:28:13,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85748136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:13,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:13,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:13,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459415937] [2022-11-19 08:28:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:13,014 INFO L87 Difference]: Start difference. First operand 2884 states and 3972 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:14,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:16,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:18,510 INFO L93 Difference]: Finished difference Result 2888 states and 3974 transitions. [2022-11-19 08:28:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 233 [2022-11-19 08:28:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:18,528 INFO L225 Difference]: With dead ends: 2888 [2022-11-19 08:28:18,528 INFO L226 Difference]: Without dead ends: 2885 [2022-11-19 08:28:18,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:18,531 INFO L413 NwaCegarLoop]: 2319 mSDtfsCounter, 2282 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2284 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:18,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2284 Valid, 2631 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-19 08:28:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2022-11-19 08:28:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2883. [2022-11-19 08:28:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 1783 states have (on average 1.3129556926528323) internal successors, (2341), 1828 states have internal predecessors, (2341), 818 states have call successors, (818), 282 states have call predecessors, (818), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-19 08:28:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3970 transitions. [2022-11-19 08:28:18,769 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3970 transitions. Word has length 233 [2022-11-19 08:28:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:18,770 INFO L495 AbstractCegarLoop]: Abstraction has 2883 states and 3970 transitions. [2022-11-19 08:28:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3970 transitions. [2022-11-19 08:28:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-19 08:28:18,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:18,775 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:28:18,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash 999611821, now seen corresponding path program 1 times [2022-11-19 08:28:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:18,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029329612] [2022-11-19 08:28:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:18,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:28:19,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:19,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029329612] [2022-11-19 08:28:19,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029329612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:19,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:19,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279085437] [2022-11-19 08:28:19,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:19,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:19,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:19,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:19,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:19,315 INFO L87 Difference]: Start difference. First operand 2883 states and 3970 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:21,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:23,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:25,460 INFO L93 Difference]: Finished difference Result 2887 states and 3972 transitions. [2022-11-19 08:28:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:25,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 234 [2022-11-19 08:28:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:25,477 INFO L225 Difference]: With dead ends: 2887 [2022-11-19 08:28:25,478 INFO L226 Difference]: Without dead ends: 2884 [2022-11-19 08:28:25,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:25,481 INFO L413 NwaCegarLoop]: 2317 mSDtfsCounter, 2279 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2281 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:25,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2281 Valid, 2629 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-11-19 08:28:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-11-19 08:28:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2882. [2022-11-19 08:28:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 1783 states have (on average 1.3123948401570387) internal successors, (2340), 1827 states have internal predecessors, (2340), 817 states have call successors, (817), 282 states have call predecessors, (817), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-19 08:28:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 3968 transitions. [2022-11-19 08:28:25,640 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 3968 transitions. Word has length 234 [2022-11-19 08:28:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:25,641 INFO L495 AbstractCegarLoop]: Abstraction has 2882 states and 3968 transitions. [2022-11-19 08:28:25,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 3968 transitions. [2022-11-19 08:28:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-19 08:28:25,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:25,646 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:25,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:28:25,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 922354061, now seen corresponding path program 1 times [2022-11-19 08:28:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:25,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742384913] [2022-11-19 08:28:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:25,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:28:26,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:26,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742384913] [2022-11-19 08:28:26,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742384913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:26,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:26,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526679958] [2022-11-19 08:28:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:26,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:26,156 INFO L87 Difference]: Start difference. First operand 2882 states and 3968 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:28,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:30,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:32,346 INFO L93 Difference]: Finished difference Result 2886 states and 3970 transitions. [2022-11-19 08:28:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 235 [2022-11-19 08:28:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:32,362 INFO L225 Difference]: With dead ends: 2886 [2022-11-19 08:28:32,363 INFO L226 Difference]: Without dead ends: 2883 [2022-11-19 08:28:32,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:32,366 INFO L413 NwaCegarLoop]: 2315 mSDtfsCounter, 2276 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2278 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:32,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2278 Valid, 2627 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-11-19 08:28:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-11-19 08:28:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2881. [2022-11-19 08:28:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 1783 states have (on average 1.311833987661245) internal successors, (2339), 1826 states have internal predecessors, (2339), 816 states have call successors, (816), 282 states have call predecessors, (816), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-19 08:28:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 3966 transitions. [2022-11-19 08:28:32,538 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 3966 transitions. Word has length 235 [2022-11-19 08:28:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:32,538 INFO L495 AbstractCegarLoop]: Abstraction has 2881 states and 3966 transitions. [2022-11-19 08:28:32,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 3966 transitions. [2022-11-19 08:28:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-19 08:28:32,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:32,543 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:32,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:28:32,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1472631632, now seen corresponding path program 1 times [2022-11-19 08:28:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:32,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657319132] [2022-11-19 08:28:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:32,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:28:32,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:32,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657319132] [2022-11-19 08:28:32,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657319132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:32,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:32,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333024293] [2022-11-19 08:28:32,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:32,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:32,994 INFO L87 Difference]: Start difference. First operand 2881 states and 3966 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:35,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:37,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:40,901 INFO L93 Difference]: Finished difference Result 5440 states and 7627 transitions. [2022-11-19 08:28:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:40,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 236 [2022-11-19 08:28:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:40,932 INFO L225 Difference]: With dead ends: 5440 [2022-11-19 08:28:40,932 INFO L226 Difference]: Without dead ends: 5437 [2022-11-19 08:28:40,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:40,937 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 2324 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 5494 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:40,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2324 Valid, 5494 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 644 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-11-19 08:28:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2022-11-19 08:28:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 5380. [2022-11-19 08:28:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 3350 states have (on average 1.315820895522388) internal successors, (4408), 3416 states have internal predecessors, (4408), 1508 states have call successors, (1508), 510 states have call predecessors, (1508), 521 states have return successors, (1587), 1520 states have call predecessors, (1587), 1503 states have call successors, (1587) [2022-11-19 08:28:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 7503 transitions. [2022-11-19 08:28:41,342 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 7503 transitions. Word has length 236 [2022-11-19 08:28:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:41,343 INFO L495 AbstractCegarLoop]: Abstraction has 5380 states and 7503 transitions. [2022-11-19 08:28:41,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 7503 transitions. [2022-11-19 08:28:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-19 08:28:41,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:41,348 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:28:41,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1592228080, now seen corresponding path program 1 times [2022-11-19 08:28:41,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:41,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891417825] [2022-11-19 08:28:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:41,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:28:41,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:41,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891417825] [2022-11-19 08:28:41,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891417825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:41,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:41,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970759134] [2022-11-19 08:28:41,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:41,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:41,790 INFO L87 Difference]: Start difference. First operand 5380 states and 7503 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:44,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:46,043 INFO L93 Difference]: Finished difference Result 5384 states and 7505 transitions. [2022-11-19 08:28:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 237 [2022-11-19 08:28:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:46,145 INFO L225 Difference]: With dead ends: 5384 [2022-11-19 08:28:46,145 INFO L226 Difference]: Without dead ends: 5369 [2022-11-19 08:28:46,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:46,149 INFO L413 NwaCegarLoop]: 2267 mSDtfsCounter, 2272 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:46,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2274 Valid, 2579 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 330 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-19 08:28:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2022-11-19 08:28:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 5367. [2022-11-19 08:28:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 3341 states have (on average 1.3151750972762646) internal successors, (4394), 3406 states have internal predecessors, (4394), 1504 states have call successors, (1504), 510 states have call predecessors, (1504), 521 states have return successors, (1584), 1517 states have call predecessors, (1584), 1500 states have call successors, (1584) [2022-11-19 08:28:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 7482 transitions. [2022-11-19 08:28:46,699 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 7482 transitions. Word has length 237 [2022-11-19 08:28:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:46,700 INFO L495 AbstractCegarLoop]: Abstraction has 5367 states and 7482 transitions. [2022-11-19 08:28:46,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:28:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 7482 transitions. [2022-11-19 08:28:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-19 08:28:46,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:46,707 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:46,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:28:46,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash -964712290, now seen corresponding path program 1 times [2022-11-19 08:28:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:46,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944510833] [2022-11-19 08:28:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:46,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-19 08:28:47,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:47,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944510833] [2022-11-19 08:28:47,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944510833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:47,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:47,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:47,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722827327] [2022-11-19 08:28:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:47,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:47,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:47,299 INFO L87 Difference]: Start difference. First operand 5367 states and 7482 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 08:28:49,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:51,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:54,588 INFO L93 Difference]: Finished difference Result 15520 states and 21638 transitions. [2022-11-19 08:28:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:54,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 263 [2022-11-19 08:28:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:54,643 INFO L225 Difference]: With dead ends: 15520 [2022-11-19 08:28:54,643 INFO L226 Difference]: Without dead ends: 10192 [2022-11-19 08:28:54,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:54,668 INFO L413 NwaCegarLoop]: 2699 mSDtfsCounter, 2185 mSDsluCounter, 2166 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 4865 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:54,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2187 Valid, 4865 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 559 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-19 08:28:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10192 states. [2022-11-19 08:28:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10192 to 10176. [2022-11-19 08:28:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 6334 states have (on average 1.3167035048942217) internal successors, (8340), 6466 states have internal predecessors, (8340), 2852 states have call successors, (2852), 968 states have call predecessors, (2852), 989 states have return successors, (3003), 2872 states have call predecessors, (3003), 2848 states have call successors, (3003) [2022-11-19 08:28:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 14195 transitions. [2022-11-19 08:28:55,520 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 14195 transitions. Word has length 263 [2022-11-19 08:28:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:55,521 INFO L495 AbstractCegarLoop]: Abstraction has 10176 states and 14195 transitions. [2022-11-19 08:28:55,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 08:28:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 14195 transitions. [2022-11-19 08:28:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-11-19 08:28:55,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:55,525 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:28:55,526 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash -812165317, now seen corresponding path program 1 times [2022-11-19 08:28:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:55,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475418391] [2022-11-19 08:28:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-11-19 08:28:57,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475418391] [2022-11-19 08:28:57,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475418391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:57,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:57,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:57,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057421334] [2022-11-19 08:28:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:57,193 INFO L87 Difference]: Start difference. First operand 10176 states and 14195 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-19 08:28:59,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:01,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:04,500 INFO L93 Difference]: Finished difference Result 15295 states and 21618 transitions. [2022-11-19 08:29:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:04,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 272 [2022-11-19 08:29:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:04,582 INFO L225 Difference]: With dead ends: 15295 [2022-11-19 08:29:04,582 INFO L226 Difference]: Without dead ends: 15276 [2022-11-19 08:29:04,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:04,594 INFO L413 NwaCegarLoop]: 2727 mSDtfsCounter, 2328 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 4879 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:04,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2328 Valid, 4879 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 546 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 08:29:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15276 states. [2022-11-19 08:29:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15276 to 15273. [2022-11-19 08:29:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15273 states, 9499 states have (on average 1.3160332666596484) internal successors, (12501), 9706 states have internal predecessors, (12501), 4289 states have call successors, (4289), 1464 states have call predecessors, (4289), 1484 states have return successors, (4793), 4298 states have call predecessors, (4793), 4285 states have call successors, (4793) [2022-11-19 08:29:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15273 states to 15273 states and 21583 transitions. [2022-11-19 08:29:05,854 INFO L78 Accepts]: Start accepts. Automaton has 15273 states and 21583 transitions. Word has length 272 [2022-11-19 08:29:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:05,854 INFO L495 AbstractCegarLoop]: Abstraction has 15273 states and 21583 transitions. [2022-11-19 08:29:05,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-19 08:29:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 15273 states and 21583 transitions. [2022-11-19 08:29:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-11-19 08:29:05,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:05,862 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 08:29:05,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:29:05,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1681622555, now seen corresponding path program 1 times [2022-11-19 08:29:05,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:05,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584466044] [2022-11-19 08:29:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:05,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-11-19 08:29:06,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584466044] [2022-11-19 08:29:06,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584466044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:06,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:06,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:29:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389581426] [2022-11-19 08:29:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:06,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:06,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:06,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:06,423 INFO L87 Difference]: Start difference. First operand 15273 states and 21583 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-19 08:29:08,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:10,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:12,784 INFO L93 Difference]: Finished difference Result 30516 states and 43116 transitions. [2022-11-19 08:29:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 298 [2022-11-19 08:29:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:12,851 INFO L225 Difference]: With dead ends: 30516 [2022-11-19 08:29:12,851 INFO L226 Difference]: Without dead ends: 15282 [2022-11-19 08:29:12,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:12,907 INFO L413 NwaCegarLoop]: 2271 mSDtfsCounter, 2332 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2334 SdHoareTripleChecker+Valid, 2590 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:12,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2334 Valid, 2590 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 336 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-19 08:29:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15282 states. [2022-11-19 08:29:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15282 to 15273. [2022-11-19 08:29:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15273 states, 9499 states have (on average 1.314769975786925) internal successors, (12489), 9706 states have internal predecessors, (12489), 4289 states have call successors, (4289), 1464 states have call predecessors, (4289), 1484 states have return successors, (4793), 4298 states have call predecessors, (4793), 4285 states have call successors, (4793) [2022-11-19 08:29:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15273 states to 15273 states and 21571 transitions. [2022-11-19 08:29:14,252 INFO L78 Accepts]: Start accepts. Automaton has 15273 states and 21571 transitions. Word has length 298 [2022-11-19 08:29:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:14,253 INFO L495 AbstractCegarLoop]: Abstraction has 15273 states and 21571 transitions. [2022-11-19 08:29:14,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-19 08:29:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 15273 states and 21571 transitions. [2022-11-19 08:29:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-11-19 08:29:14,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:14,261 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 4, 2, 2, 2, 2, 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] [2022-11-19 08:29:14,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:29:14,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:14,263 INFO L85 PathProgramCache]: Analyzing trace with hash -90073040, now seen corresponding path program 1 times [2022-11-19 08:29:14,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:14,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714206690] [2022-11-19 08:29:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:14,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2022-11-19 08:29:17,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:17,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714206690] [2022-11-19 08:29:17,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714206690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:29:17,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976928452] [2022-11-19 08:29:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:17,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:17,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:17,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:29:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:19,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 6598 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:29:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-19 08:29:20,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:20,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976928452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:20,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:29:20,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-19 08:29:20,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279280127] [2022-11-19 08:29:20,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:29:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:29:20,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:29:20,104 INFO L87 Difference]: Start difference. First operand 15273 states and 21571 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-19 08:29:22,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:24,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:29,734 INFO L93 Difference]: Finished difference Result 30543 states and 43907 transitions. [2022-11-19 08:29:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:29:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) Word has length 310 [2022-11-19 08:29:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:29,815 INFO L225 Difference]: With dead ends: 30543 [2022-11-19 08:29:29,815 INFO L226 Difference]: Without dead ends: 15309 [2022-11-19 08:29:29,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:29:29,882 INFO L413 NwaCegarLoop]: 2175 mSDtfsCounter, 2 mSDsluCounter, 6515 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8690 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:29,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8690 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1088 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-11-19 08:29:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15309 states. [2022-11-19 08:29:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15309 to 15283. [2022-11-19 08:29:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15283 states, 9506 states have (on average 1.314538186408584) internal successors, (12496), 9714 states have internal predecessors, (12496), 4289 states have call successors, (4289), 1464 states have call predecessors, (4289), 1487 states have return successors, (4804), 4300 states have call predecessors, (4804), 4285 states have call successors, (4804) [2022-11-19 08:29:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15283 states to 15283 states and 21589 transitions. [2022-11-19 08:29:31,000 INFO L78 Accepts]: Start accepts. Automaton has 15283 states and 21589 transitions. Word has length 310 [2022-11-19 08:29:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:31,001 INFO L495 AbstractCegarLoop]: Abstraction has 15283 states and 21589 transitions. [2022-11-19 08:29:31,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-19 08:29:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15283 states and 21589 transitions. [2022-11-19 08:29:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-11-19 08:29:31,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:31,009 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 4, 2, 2, 2, 2, 2, 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] [2022-11-19 08:29:31,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:29:31,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:31,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1658931456, now seen corresponding path program 1 times [2022-11-19 08:29:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:31,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287790380] [2022-11-19 08:29:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-19 08:29:34,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287790380] [2022-11-19 08:29:34,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287790380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:29:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736124965] [2022-11-19 08:29:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:34,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:34,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:34,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:34,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:29:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:36,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 6612 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:29:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-19 08:29:37,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:37,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736124965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:37,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:29:37,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-19 08:29:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904580129] [2022-11-19 08:29:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:37,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:29:37,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:37,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:29:37,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:29:37,019 INFO L87 Difference]: Start difference. First operand 15283 states and 21589 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-19 08:29:41,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:43,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:48,568 INFO L93 Difference]: Finished difference Result 30563 states and 43943 transitions. [2022-11-19 08:29:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:29:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) Word has length 315 [2022-11-19 08:29:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:48,643 INFO L225 Difference]: With dead ends: 30563 [2022-11-19 08:29:48,643 INFO L226 Difference]: Without dead ends: 15319 [2022-11-19 08:29:48,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:29:48,703 INFO L413 NwaCegarLoop]: 2174 mSDtfsCounter, 2 mSDsluCounter, 6512 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8686 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:48,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8686 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1089 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2022-11-19 08:29:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15319 states. [2022-11-19 08:29:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15319 to 15283. [2022-11-19 08:29:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15283 states, 9506 states have (on average 1.314538186408584) internal successors, (12496), 9714 states have internal predecessors, (12496), 4289 states have call successors, (4289), 1464 states have call predecessors, (4289), 1487 states have return successors, (4804), 4300 states have call predecessors, (4804), 4285 states have call successors, (4804) [2022-11-19 08:29:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15283 states to 15283 states and 21589 transitions. [2022-11-19 08:29:49,872 INFO L78 Accepts]: Start accepts. Automaton has 15283 states and 21589 transitions. Word has length 315 [2022-11-19 08:29:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:49,873 INFO L495 AbstractCegarLoop]: Abstraction has 15283 states and 21589 transitions. [2022-11-19 08:29:49,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-19 08:29:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15283 states and 21589 transitions. [2022-11-19 08:29:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-11-19 08:29:49,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:49,893 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 10, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-19 08:29:49,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:29:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:50,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 181402697, now seen corresponding path program 1 times [2022-11-19 08:29:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625629549] [2022-11-19 08:29:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-19 08:29:50,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625629549] [2022-11-19 08:29:50,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625629549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:50,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:50,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:29:50,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775180607] [2022-11-19 08:29:50,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:50,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:50,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:50,709 INFO L87 Difference]: Start difference. First operand 15283 states and 21589 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-19 08:29:52,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:55,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:58,603 INFO L93 Difference]: Finished difference Result 36853 states and 51854 transitions. [2022-11-19 08:29:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 388 [2022-11-19 08:29:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:58,841 INFO L225 Difference]: With dead ends: 36853 [2022-11-19 08:29:58,841 INFO L226 Difference]: Without dead ends: 21609 [2022-11-19 08:29:58,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:58,887 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 1970 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1972 SdHoareTripleChecker+Valid, 5057 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:58,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1972 Valid, 5057 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 667 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 08:29:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21609 states. [2022-11-19 08:30:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21609 to 21597. [2022-11-19 08:30:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21597 states, 13533 states have (on average 1.314342717800931) internal successors, (17787), 13828 states have internal predecessors, (17787), 5880 states have call successors, (5880), 2148 states have call predecessors, (5880), 2183 states have return successors, (6555), 5894 states have call predecessors, (6555), 5876 states have call successors, (6555) [2022-11-19 08:30:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21597 states to 21597 states and 30222 transitions. [2022-11-19 08:30:00,229 INFO L78 Accepts]: Start accepts. Automaton has 21597 states and 30222 transitions. Word has length 388 [2022-11-19 08:30:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:00,230 INFO L495 AbstractCegarLoop]: Abstraction has 21597 states and 30222 transitions. [2022-11-19 08:30:00,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-19 08:30:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 21597 states and 30222 transitions. [2022-11-19 08:30:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-11-19 08:30:00,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:00,246 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:00,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:30:00,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1136578779, now seen corresponding path program 1 times [2022-11-19 08:30:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:00,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551913306] [2022-11-19 08:30:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2022-11-19 08:30:01,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551913306] [2022-11-19 08:30:01,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551913306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:01,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:01,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:30:01,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306929237] [2022-11-19 08:30:01,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:01,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:30:01,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:01,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:30:01,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:01,923 INFO L87 Difference]: Start difference. First operand 21597 states and 30222 transitions. Second operand has 6 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-19 08:30:03,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:05,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:07,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:10,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:16,247 INFO L93 Difference]: Finished difference Result 21715 states and 30374 transitions. [2022-11-19 08:30:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:30:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) Word has length 370 [2022-11-19 08:30:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:16,331 INFO L225 Difference]: With dead ends: 21715 [2022-11-19 08:30:16,331 INFO L226 Difference]: Without dead ends: 21712 [2022-11-19 08:30:16,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:16,341 INFO L413 NwaCegarLoop]: 2374 mSDtfsCounter, 714 mSDsluCounter, 6309 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 255 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 8683 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:16,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 8683 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1132 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2022-11-19 08:30:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21712 states. [2022-11-19 08:30:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21712 to 21708. [2022-11-19 08:30:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21708 states, 13601 states have (on average 1.314094551871186) internal successors, (17873), 13896 states have internal predecessors, (17873), 5904 states have call successors, (5904), 2167 states have call predecessors, (5904), 2202 states have return successors, (6579), 5919 states have call predecessors, (6579), 5901 states have call successors, (6579) [2022-11-19 08:30:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21708 states to 21708 states and 30356 transitions. [2022-11-19 08:30:17,851 INFO L78 Accepts]: Start accepts. Automaton has 21708 states and 30356 transitions. Word has length 370 [2022-11-19 08:30:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:17,852 INFO L495 AbstractCegarLoop]: Abstraction has 21708 states and 30356 transitions. [2022-11-19 08:30:17,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-19 08:30:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 21708 states and 30356 transitions. [2022-11-19 08:30:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-19 08:30:17,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:17,872 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:30:17,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash 786856786, now seen corresponding path program 1 times [2022-11-19 08:30:17,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:17,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486047621] [2022-11-19 08:30:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-11-19 08:30:18,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:18,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486047621] [2022-11-19 08:30:18,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486047621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:18,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:18,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:18,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201946910] [2022-11-19 08:30:18,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:18,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:30:18,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:30:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:30:18,549 INFO L87 Difference]: Start difference. First operand 21708 states and 30356 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-19 08:30:20,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:22,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:28,358 INFO L93 Difference]: Finished difference Result 63610 states and 88930 transitions. [2022-11-19 08:30:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:30:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 383 [2022-11-19 08:30:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:28,533 INFO L225 Difference]: With dead ends: 63610 [2022-11-19 08:30:28,533 INFO L226 Difference]: Without dead ends: 41941 [2022-11-19 08:30:28,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:30:28,617 INFO L413 NwaCegarLoop]: 3388 mSDtfsCounter, 2202 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 5557 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:28,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2203 Valid, 5557 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 678 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-11-19 08:30:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41941 states. [2022-11-19 08:30:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41941 to 41919. [2022-11-19 08:30:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41919 states, 26238 states have (on average 1.313895876210077) internal successors, (34474), 26835 states have internal predecessors, (34474), 11426 states have call successors, (11426), 4186 states have call predecessors, (11426), 4254 states have return successors, (12693), 11442 states have call predecessors, (12693), 11423 states have call successors, (12693) [2022-11-19 08:30:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41919 states to 41919 states and 58593 transitions. [2022-11-19 08:30:31,223 INFO L78 Accepts]: Start accepts. Automaton has 41919 states and 58593 transitions. Word has length 383 [2022-11-19 08:30:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:31,224 INFO L495 AbstractCegarLoop]: Abstraction has 41919 states and 58593 transitions. [2022-11-19 08:30:31,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-19 08:30:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 41919 states and 58593 transitions. [2022-11-19 08:30:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-19 08:30:31,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:31,259 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:31,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:30:31,260 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:31,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1021407165, now seen corresponding path program 1 times [2022-11-19 08:30:31,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:31,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578599439] [2022-11-19 08:30:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:31,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-19 08:30:34,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:34,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578599439] [2022-11-19 08:30:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578599439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:34,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:34,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:30:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361630008] [2022-11-19 08:30:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:30:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:30:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:30:34,409 INFO L87 Difference]: Start difference. First operand 41919 states and 58593 transitions. Second operand has 7 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) [2022-11-19 08:30:36,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:39,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:51,110 INFO L93 Difference]: Finished difference Result 41923 states and 58595 transitions. [2022-11-19 08:30:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:30:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) Word has length 369 [2022-11-19 08:30:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:51,301 INFO L225 Difference]: With dead ends: 41923 [2022-11-19 08:30:51,301 INFO L226 Difference]: Without dead ends: 41897 [2022-11-19 08:30:51,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:30:51,325 INFO L413 NwaCegarLoop]: 1129 mSDtfsCounter, 3178 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 2139 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3454 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 5036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2139 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:51,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3454 Valid, 2942 Invalid, 5036 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2139 Valid, 2895 Invalid, 2 Unknown, 0 Unchecked, 14.2s Time] [2022-11-19 08:30:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41897 states. [2022-11-19 08:30:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41897 to 41895. [2022-11-19 08:30:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41895 states, 26227 states have (on average 1.3131124413772066) internal successors, (34439), 26820 states have internal predecessors, (34439), 11413 states have call successors, (11413), 4186 states have call predecessors, (11413), 4254 states have return successors, (12681), 11433 states have call predecessors, (12681), 11411 states have call successors, (12681) [2022-11-19 08:30:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41895 states to 41895 states and 58533 transitions. [2022-11-19 08:30:54,736 INFO L78 Accepts]: Start accepts. Automaton has 41895 states and 58533 transitions. Word has length 369 [2022-11-19 08:30:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:54,737 INFO L495 AbstractCegarLoop]: Abstraction has 41895 states and 58533 transitions. [2022-11-19 08:30:54,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) [2022-11-19 08:30:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 41895 states and 58533 transitions. [2022-11-19 08:30:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-19 08:30:54,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:54,770 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 08:30:54,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:30:54,771 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2074814044, now seen corresponding path program 1 times [2022-11-19 08:30:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:54,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530782916] [2022-11-19 08:30:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-11-19 08:30:58,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:58,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530782916] [2022-11-19 08:30:58,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530782916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:30:58,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17815406] [2022-11-19 08:30:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:58,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:58,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:30:58,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:30:58,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:31:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 7284 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:31:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-11-19 08:31:01,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:01,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17815406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:01,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:31:01,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-19 08:31:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145554703] [2022-11-19 08:31:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:31:01,367 INFO L87 Difference]: Start difference. First operand 41895 states and 58533 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (55), 3 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-19 08:31:02,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:04,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:06,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:07,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:10,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:18,159 INFO L93 Difference]: Finished difference Result 83787 states and 118612 transitions. [2022-11-19 08:31:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:31:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (55), 3 states have call predecessors, (55), 2 states have call successors, (55) Word has length 387 [2022-11-19 08:31:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:18,381 INFO L225 Difference]: With dead ends: 83787 [2022-11-19 08:31:18,381 INFO L226 Difference]: Without dead ends: 41931 [2022-11-19 08:31:18,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:31:18,567 INFO L413 NwaCegarLoop]: 2164 mSDtfsCounter, 2 mSDsluCounter, 6478 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8642 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:18,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8642 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1086 Invalid, 3 Unknown, 0 Unchecked, 14.0s Time] [2022-11-19 08:31:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41931 states. [2022-11-19 08:31:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41931 to 41931. [2022-11-19 08:31:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41931 states, 26251 states have (on average 1.3119119271646795) internal successors, (34439), 26844 states have internal predecessors, (34439), 11413 states have call successors, (11413), 4186 states have call predecessors, (11413), 4266 states have return successors, (12557), 11445 states have call predecessors, (12557), 11411 states have call successors, (12557) [2022-11-19 08:31:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41931 states to 41931 states and 58409 transitions. [2022-11-19 08:31:21,581 INFO L78 Accepts]: Start accepts. Automaton has 41931 states and 58409 transitions. Word has length 387 [2022-11-19 08:31:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:21,582 INFO L495 AbstractCegarLoop]: Abstraction has 41931 states and 58409 transitions. [2022-11-19 08:31:21,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (55), 3 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-19 08:31:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 41931 states and 58409 transitions. [2022-11-19 08:31:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-11-19 08:31:21,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:21,609 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 10, 10, 10, 10, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:21,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 08:31:21,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea9e7ef-b20c-4cfb-9a28-d05ce5b5d77a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:31:21,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash 745193418, now seen corresponding path program 1 times [2022-11-19 08:31:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:21,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094001698] [2022-11-19 08:31:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:21,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1747 trivial. 0 not checked. [2022-11-19 08:31:22,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:22,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094001698] [2022-11-19 08:31:22,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094001698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:22,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:22,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577426845] [2022-11-19 08:31:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:31:22,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:31:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:22,419 INFO L87 Difference]: Start difference. First operand 41931 states and 58409 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-19 08:31:24,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:26,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:31,367 INFO L93 Difference]: Finished difference Result 41933 states and 58410 transitions. [2022-11-19 08:31:31,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:31:31,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 407 [2022-11-19 08:31:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:31,505 INFO L225 Difference]: With dead ends: 41933 [2022-11-19 08:31:31,505 INFO L226 Difference]: Without dead ends: 41930 [2022-11-19 08:31:31,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:31,521 INFO L413 NwaCegarLoop]: 2155 mSDtfsCounter, 21 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4288 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:31,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 4288 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 533 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 08:31:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41930 states. [2022-11-19 08:31:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41930 to 41930. [2022-11-19 08:31:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41930 states, 26251 states have (on average 1.310997676278999) internal successors, (34415), 26843 states have internal predecessors, (34415), 11412 states have call successors, (11412), 4186 states have call predecessors, (11412), 4266 states have return successors, (12557), 11445 states have call predecessors, (12557), 11411 states have call successors, (12557) [2022-11-19 08:31:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41930 states to 41930 states and 58384 transitions. [2022-11-19 08:31:34,776 INFO L78 Accepts]: Start accepts. Automaton has 41930 states and 58384 transitions. Word has length 407 [2022-11-19 08:31:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:34,777 INFO L495 AbstractCegarLoop]: Abstraction has 41930 states and 58384 transitions. [2022-11-19 08:31:34,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-19 08:31:34,777 INFO L276 IsEmpty]: Start isEmpty. Operand 41930 states and 58384 transitions. [2022-11-19 08:31:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2022-11-19 08:31:34,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:34,810 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 08:31:34,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:31:34,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:34,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1683489516, now seen corresponding path program 1 times [2022-11-19 08:31:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:34,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371676802] [2022-11-19 08:31:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:34,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat