./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:21:40,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:21:40,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:21:40,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:21:40,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:21:40,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:21:40,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:21:40,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:21:40,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:21:40,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:21:40,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:21:40,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:21:40,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:21:40,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:21:40,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:21:40,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:21:40,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:21:40,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:21:40,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:21:40,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:21:40,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:21:40,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:21:40,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:21:40,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:21:40,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:21:40,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:21:40,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:21:40,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:21:40,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:21:40,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:21:40,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:21:40,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:21:40,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:21:40,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:21:40,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:21:40,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:21:40,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:21:40,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:21:40,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:21:40,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:21:40,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:21:40,888 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:21:40,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:21:40,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:21:40,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:21:40,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:21:40,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:21:40,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:21:40,916 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:21:40,917 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:21:40,917 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:21:40,917 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:21:40,917 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:21:40,917 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:21:40,917 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:21:40,918 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:21:40,918 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:21:40,918 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:21:40,918 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:21:40,918 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:21:40,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:21:40,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:21:40,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:21:40,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:21:40,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:21:40,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:21:40,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:21:40,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:21:40,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:21:40,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:21:40,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:21:40,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:40,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:21:40,930 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:21:40,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:21:40,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:21:40,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:21:40,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:21:40,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:21:40,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:21:40,931 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_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 [2022-10-17 17:21:41,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:21:41,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:21:41,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:21:41,214 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:21:41,215 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:21:41,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2022-10-17 17:21:41,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/data/42b00e714/34418443b9934ad7bb9ce56aa7250276/FLAG2ccd8bcba [2022-10-17 17:21:42,212 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:21:42,213 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2022-10-17 17:21:42,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/data/42b00e714/34418443b9934ad7bb9ce56aa7250276/FLAG2ccd8bcba [2022-10-17 17:21:42,757 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/data/42b00e714/34418443b9934ad7bb9ce56aa7250276 [2022-10-17 17:21:42,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:21:42,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:21:42,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:42,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:21:42,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:21:42,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:42" (1/1) ... [2022-10-17 17:21:42,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172f633a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:42, skipping insertion in model container [2022-10-17 17:21:42,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:42" (1/1) ... [2022-10-17 17:21:42,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:21:42,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:21:43,403 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2022-10-17 17:21:43,404 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3060-3061] [2022-10-17 17:21:43,560 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i[90990,91003] [2022-10-17 17:21:44,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:44,183 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:21:44,290 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2022-10-17 17:21:44,291 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3060-3061] [2022-10-17 17:21:44,307 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i[90990,91003] [2022-10-17 17:21:44,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:44,526 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:21:44,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44 WrapperNode [2022-10-17 17:21:44,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:44,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:44,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:21:44,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:21:44,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,747 INFO L138 Inliner]: procedures = 119, calls = 771, calls flagged for inlining = 38, calls inlined = 36, statements flattened = 1521 [2022-10-17 17:21:44,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:44,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:21:44,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:21:44,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:21:44,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:44,998 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:45,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:45,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:21:45,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:21:45,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:21:45,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:21:45,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (1/1) ... [2022-10-17 17:21:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:45,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:45,179 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:21:45,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:21:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2022-10-17 17:21:45,248 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2022-10-17 17:21:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-10-17 17:21:45,248 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-10-17 17:21:45,249 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2022-10-17 17:21:45,249 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2022-10-17 17:21:45,249 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2022-10-17 17:21:45,249 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2022-10-17 17:21:45,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:21:45,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:21:45,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:21:45,250 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2022-10-17 17:21:45,250 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2022-10-17 17:21:45,250 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2022-10-17 17:21:45,250 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2022-10-17 17:21:45,251 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2022-10-17 17:21:45,251 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2022-10-17 17:21:45,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:21:45,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:21:45,251 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2022-10-17 17:21:45,251 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2022-10-17 17:21:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2022-10-17 17:21:45,252 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2022-10-17 17:21:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2022-10-17 17:21:45,252 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2022-10-17 17:21:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:21:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2022-10-17 17:21:45,253 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2022-10-17 17:21:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-10-17 17:21:45,253 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-10-17 17:21:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:21:45,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:21:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 17:21:45,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 17:21:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:21:45,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:21:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2022-10-17 17:21:45,255 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2022-10-17 17:21:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:21:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2022-10-17 17:21:45,255 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2022-10-17 17:21:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2022-10-17 17:21:45,256 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2022-10-17 17:21:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-10-17 17:21:45,257 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-10-17 17:21:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:21:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-10-17 17:21:45,258 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-10-17 17:21:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-10-17 17:21:45,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-10-17 17:21:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:21:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:21:45,260 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2022-10-17 17:21:45,260 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2022-10-17 17:21:45,260 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-10-17 17:21:45,261 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-10-17 17:21:45,261 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2022-10-17 17:21:45,261 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2022-10-17 17:21:45,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:21:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2022-10-17 17:21:45,262 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2022-10-17 17:21:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2022-10-17 17:21:45,262 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2022-10-17 17:21:45,263 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_20 [2022-10-17 17:21:45,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_20 [2022-10-17 17:21:45,263 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2022-10-17 17:21:45,263 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2022-10-17 17:21:45,264 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2022-10-17 17:21:45,264 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2022-10-17 17:21:45,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:21:45,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:21:45,265 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2022-10-17 17:21:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2022-10-17 17:21:45,265 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2022-10-17 17:21:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2022-10-17 17:21:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-10-17 17:21:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-10-17 17:21:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2022-10-17 17:21:45,267 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2022-10-17 17:21:45,267 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2022-10-17 17:21:45,268 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2022-10-17 17:21:45,268 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2022-10-17 17:21:45,268 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2022-10-17 17:21:45,268 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-10-17 17:21:45,269 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-10-17 17:21:45,269 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2022-10-17 17:21:45,269 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2022-10-17 17:21:45,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:21:45,271 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2022-10-17 17:21:45,271 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2022-10-17 17:21:45,271 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2022-10-17 17:21:45,271 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2022-10-17 17:21:45,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 17:21:45,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 17:21:45,272 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-10-17 17:21:45,272 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-10-17 17:21:45,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:21:45,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:21:45,272 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2022-10-17 17:21:45,273 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2022-10-17 17:21:45,273 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-10-17 17:21:45,273 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-10-17 17:21:45,781 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:21:45,785 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:21:45,914 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:21:54,638 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:21:55,333 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:21:55,337 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 17:21:55,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:55 BoogieIcfgContainer [2022-10-17 17:21:55,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:21:55,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:21:55,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:21:55,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:21:55,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:21:42" (1/3) ... [2022-10-17 17:21:55,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a22f346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:55, skipping insertion in model container [2022-10-17 17:21:55,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:44" (2/3) ... [2022-10-17 17:21:55,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a22f346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:55, skipping insertion in model container [2022-10-17 17:21:55,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:55" (3/3) ... [2022-10-17 17:21:55,364 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2022-10-17 17:21:55,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:21:55,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:21:55,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:21:55,538 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;@36fcc6f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:21:55,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:21:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 562 states, 348 states have (on average 1.367816091954023) internal successors, (476), 368 states have internal predecessors, (476), 172 states have call successors, (172), 45 states have call predecessors, (172), 44 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-10-17 17:21:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-10-17 17:21:55,599 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:55,600 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-10-17 17:21:55,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -35891143, now seen corresponding path program 1 times [2022-10-17 17:21:55,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:55,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881218382] [2022-10-17 17:21:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 17:21:56,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881218382] [2022-10-17 17:21:56,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881218382] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:56,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:56,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:21:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063731849] [2022-10-17 17:21:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:56,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:56,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:56,595 INFO L87 Difference]: Start difference. First operand has 562 states, 348 states have (on average 1.367816091954023) internal successors, (476), 368 states have internal predecessors, (476), 172 states have call successors, (172), 45 states have call predecessors, (172), 44 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-10-17 17:21:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:58,079 INFO L93 Difference]: Finished difference Result 1359 states and 1994 transitions. [2022-10-17 17:21:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:58,082 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 104 [2022-10-17 17:21:58,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:58,101 INFO L225 Difference]: With dead ends: 1359 [2022-10-17 17:21:58,102 INFO L226 Difference]: Without dead ends: 772 [2022-10-17 17:21:58,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:58,114 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 370 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:58,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1548 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 17:21:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-10-17 17:21:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-10-17 17:21:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 472 states have (on average 1.3389830508474576) internal successors, (632), 488 states have internal predecessors, (632), 230 states have call successors, (230), 70 states have call predecessors, (230), 69 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-10-17 17:21:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1091 transitions. [2022-10-17 17:21:58,323 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1091 transitions. Word has length 104 [2022-10-17 17:21:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:58,324 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1091 transitions. [2022-10-17 17:21:58,324 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-10-17 17:21:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1091 transitions. [2022-10-17 17:21:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-10-17 17:21:58,338 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:58,338 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 17:21:58,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:21:58,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:58,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2088945554, now seen corresponding path program 1 times [2022-10-17 17:21:58,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:58,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160569195] [2022-10-17 17:21:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:58,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-10-17 17:21:58,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:58,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160569195] [2022-10-17 17:21:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160569195] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:58,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:58,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:21:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010404931] [2022-10-17 17:21:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:58,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:58,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:58,927 INFO L87 Difference]: Start difference. First operand 772 states and 1091 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-10-17 17:22:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:00,305 INFO L93 Difference]: Finished difference Result 1541 states and 2188 transitions. [2022-10-17 17:22:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 132 [2022-10-17 17:22:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:00,314 INFO L225 Difference]: With dead ends: 1541 [2022-10-17 17:22:00,315 INFO L226 Difference]: Without dead ends: 794 [2022-10-17 17:22:00,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:00,321 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 10 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:00,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1349 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 17:22:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-10-17 17:22:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 774. [2022-10-17 17:22:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 474 states have (on average 1.3375527426160339) internal successors, (634), 490 states have internal predecessors, (634), 230 states have call successors, (230), 70 states have call predecessors, (230), 69 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-10-17 17:22:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1093 transitions. [2022-10-17 17:22:00,382 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1093 transitions. Word has length 132 [2022-10-17 17:22:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:00,383 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 1093 transitions. [2022-10-17 17:22:00,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-10-17 17:22:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1093 transitions. [2022-10-17 17:22:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-10-17 17:22:00,389 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:00,390 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 17:22:00,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:22:00,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:00,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1280940682, now seen corresponding path program 1 times [2022-10-17 17:22:00,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791443500] [2022-10-17 17:22:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:00,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-17 17:22:00,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791443500] [2022-10-17 17:22:00,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791443500] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:00,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:00,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275337102] [2022-10-17 17:22:00,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:00,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:00,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:00,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:00,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:00,764 INFO L87 Difference]: Start difference. First operand 774 states and 1093 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-10-17 17:22:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:02,698 INFO L93 Difference]: Finished difference Result 1714 states and 2464 transitions. [2022-10-17 17:22:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 135 [2022-10-17 17:22:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:02,734 INFO L225 Difference]: With dead ends: 1714 [2022-10-17 17:22:02,735 INFO L226 Difference]: Without dead ends: 965 [2022-10-17 17:22:02,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:02,740 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 178 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:02,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1613 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 17:22:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-10-17 17:22:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 782. [2022-10-17 17:22:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 482 states have (on average 1.3402489626556016) internal successors, (646), 498 states have internal predecessors, (646), 230 states have call successors, (230), 70 states have call predecessors, (230), 69 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-10-17 17:22:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1105 transitions. [2022-10-17 17:22:02,810 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1105 transitions. Word has length 135 [2022-10-17 17:22:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:02,811 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1105 transitions. [2022-10-17 17:22:02,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-10-17 17:22:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1105 transitions. [2022-10-17 17:22:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-10-17 17:22:02,818 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:02,819 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 17:22:02,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:22:02,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1184111153, now seen corresponding path program 1 times [2022-10-17 17:22:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:02,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099929314] [2022-10-17 17:22:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:02,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-10-17 17:22:03,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:03,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099929314] [2022-10-17 17:22:03,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099929314] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:03,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304009619] [2022-10-17 17:22:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:03,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:03,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:03,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:22:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:04,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 2444 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:22:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-17 17:22:04,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:04,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304009619] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:04,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:22:04,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 17:22:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258990291] [2022-10-17 17:22:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:04,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:04,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:04,323 INFO L87 Difference]: Start difference. First operand 782 states and 1105 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 17:22:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:06,040 INFO L93 Difference]: Finished difference Result 1545 states and 2190 transitions. [2022-10-17 17:22:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 140 [2022-10-17 17:22:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:06,048 INFO L225 Difference]: With dead ends: 1545 [2022-10-17 17:22:06,048 INFO L226 Difference]: Without dead ends: 788 [2022-10-17 17:22:06,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:06,058 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 4 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:06,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1344 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-17 17:22:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-10-17 17:22:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 784. [2022-10-17 17:22:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 484 states have (on average 1.3388429752066116) internal successors, (648), 500 states have internal predecessors, (648), 230 states have call successors, (230), 70 states have call predecessors, (230), 69 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-10-17 17:22:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1107 transitions. [2022-10-17 17:22:06,111 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1107 transitions. Word has length 140 [2022-10-17 17:22:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:06,114 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1107 transitions. [2022-10-17 17:22:06,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 17:22:06,114 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1107 transitions. [2022-10-17 17:22:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-10-17 17:22:06,121 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:06,121 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 17:22:06,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:06,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:06,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash 341947589, now seen corresponding path program 1 times [2022-10-17 17:22:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:06,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759936623] [2022-10-17 17:22:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:06,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-17 17:22:06,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:06,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759936623] [2022-10-17 17:22:06,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759936623] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:06,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750430630] [2022-10-17 17:22:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:06,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:06,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:06,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:06,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:22:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-10-17 17:22:07,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:07,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750430630] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:07,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:22:07,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 17:22:07,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592208736] [2022-10-17 17:22:07,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:07,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:07,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:07,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:07,838 INFO L87 Difference]: Start difference. First operand 784 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 17:22:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:09,136 INFO L93 Difference]: Finished difference Result 1549 states and 2221 transitions. [2022-10-17 17:22:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:09,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 143 [2022-10-17 17:22:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:09,147 INFO L225 Difference]: With dead ends: 1549 [2022-10-17 17:22:09,147 INFO L226 Difference]: Without dead ends: 790 [2022-10-17 17:22:09,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:09,154 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 2 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:09,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1347 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 17:22:09,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-10-17 17:22:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 786. [2022-10-17 17:22:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 486 states have (on average 1.337448559670782) internal successors, (650), 502 states have internal predecessors, (650), 230 states have call successors, (230), 70 states have call predecessors, (230), 69 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-10-17 17:22:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1109 transitions. [2022-10-17 17:22:09,210 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1109 transitions. Word has length 143 [2022-10-17 17:22:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:09,211 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1109 transitions. [2022-10-17 17:22:09,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 17:22:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1109 transitions. [2022-10-17 17:22:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-10-17 17:22:09,219 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:09,220 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 17:22:09,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:09,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:09,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash -525375092, now seen corresponding path program 1 times [2022-10-17 17:22:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:09,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847567939] [2022-10-17 17:22:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:09,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-10-17 17:22:10,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847567939] [2022-10-17 17:22:10,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847567939] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331946689] [2022-10-17 17:22:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:10,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:10,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:22:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:11,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:11,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-10-17 17:22:11,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:11,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331946689] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:11,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:22:11,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-10-17 17:22:11,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970389117] [2022-10-17 17:22:11,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:11,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:11,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:11,783 INFO L87 Difference]: Start difference. First operand 786 states and 1109 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2022-10-17 17:22:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:12,352 INFO L93 Difference]: Finished difference Result 786 states and 1109 transitions. [2022-10-17 17:22:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) Word has length 186 [2022-10-17 17:22:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:12,354 INFO L225 Difference]: With dead ends: 786 [2022-10-17 17:22:12,354 INFO L226 Difference]: Without dead ends: 0 [2022-10-17 17:22:12,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:12,358 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 624 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:12,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 672 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:22:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-17 17:22:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-17 17:22:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-17 17:22:12,360 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2022-10-17 17:22:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:12,360 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-17 17:22:12,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2022-10-17 17:22:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-17 17:22:12,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-17 17:22:12,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:22:12,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30728b74-cb00-4af8-924f-c7ec2763d018/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0