./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.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_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/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_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/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_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/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 884b97cc6fb4051ca91e84ac99a2a164f2566357f30136c91fcf54410ed45574 --- 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 07:45:43,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:45:43,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:45:43,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:45:43,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:45:43,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:45:43,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:45:43,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:45:43,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:45:43,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:45:43,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:45:43,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:45:43,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:45:43,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:45:43,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:45:43,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:45:43,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:45:44,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:45:44,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:45:44,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:45:44,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:45:44,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:45:44,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:45:44,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:45:44,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:45:44,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:45:44,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:45:44,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:45:44,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:45:44,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:45:44,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:45:44,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:45:44,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:45:44,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:45:44,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:45:44,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:45:44,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:45:44,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:45:44,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:45:44,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:45:44,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:45:44,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:45:44,086 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:45:44,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:45:44,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:45:44,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:45:44,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:45:44,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:45:44,092 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:45:44,092 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:45:44,092 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:45:44,092 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:45:44,093 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:45:44,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:45:44,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:45:44,094 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:45:44,094 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:45:44,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:45:44,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:45:44,095 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:45:44,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:45:44,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:45:44,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:45:44,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:45:44,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:45:44,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:45:44,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:45:44,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:45:44,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:45:44,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:45:44,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:45:44,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:45:44,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:45:44,100 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:45:44,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:45:44,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:45:44,101 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:45:44,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:45:44,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:45:44,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:45:44,102 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_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884b97cc6fb4051ca91e84ac99a2a164f2566357f30136c91fcf54410ed45574 [2022-11-19 07:45:44,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:45:44,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:45:44,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:45:44,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:45:44,396 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:45:44,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i [2022-11-19 07:45:44,481 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/data/0c5f5cb6b/3a2328cfeed14d44b71eb94e3667bffd/FLAG426447454 [2022-11-19 07:45:45,444 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:45:45,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i [2022-11-19 07:45:45,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/data/0c5f5cb6b/3a2328cfeed14d44b71eb94e3667bffd/FLAG426447454 [2022-11-19 07:45:45,895 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/data/0c5f5cb6b/3a2328cfeed14d44b71eb94e3667bffd [2022-11-19 07:45:45,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:45:45,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:45:45,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:45:45,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:45:45,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:45:45,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:45" (1/1) ... [2022-11-19 07:45:45,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f289b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45, skipping insertion in model container [2022-11-19 07:45:45,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:45" (1/1) ... [2022-11-19 07:45:45,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:45:46,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:45:48,785 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_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i[397949,397962] [2022-11-19 07:45:48,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:45:48,914 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:45:49,512 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_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i[397949,397962] [2022-11-19 07:45:49,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:45:49,659 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:45:49,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49 WrapperNode [2022-11-19 07:45:49,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:45:49,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:45:49,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:45:49,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:45:49,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:49,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,090 INFO L138 Inliner]: procedures = 332, calls = 2875, calls flagged for inlining = 154, calls inlined = 147, statements flattened = 8664 [2022-11-19 07:45:50,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:45:50,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:45:50,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:45:50,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:45:50,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:45:50,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:45:50,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:45:50,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:45:50,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (1/1) ... [2022-11-19 07:45:50,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:45:50,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:50,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:45:50,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:45:50,628 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 07:45:50,628 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 07:45:50,628 INFO L130 BoogieDeclarations]: Found specification of procedure sg_finish_rem_req [2022-11-19 07:45:50,629 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_finish_rem_req [2022-11-19 07:45:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2022-11-19 07:45:50,629 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2022-11-19 07:45:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure sg_rq_end_io_usercontext [2022-11-19 07:45:50,629 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_rq_end_io_usercontext [2022-11-19 07:45:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2022-11-19 07:45:50,629 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2022-11-19 07:45:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:45:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:45:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:45:50,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:45:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure seq_puts [2022-11-19 07:45:50,630 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_puts [2022-11-19 07:45:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:45:50,630 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:45:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-19 07:45:50,631 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-19 07:45:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure srp_done [2022-11-19 07:45:50,631 INFO L138 BoogieDeclarations]: Found implementation of procedure srp_done [2022-11-19 07:45:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2022-11-19 07:45:50,631 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2022-11-19 07:45:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-19 07:45:50,632 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-19 07:45:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-19 07:45:50,632 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-19 07:45:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:45:50,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:45:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2022-11-19 07:45:50,632 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2022-11-19 07:45:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2022-11-19 07:45:50,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2022-11-19 07:45:50,633 INFO L130 BoogieDeclarations]: Found specification of procedure sg_mmap [2022-11-19 07:45:50,633 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_mmap [2022-11-19 07:45:50,633 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2022-11-19 07:45:50,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2022-11-19 07:45:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure sg_res_in_use [2022-11-19 07:45:50,634 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_res_in_use [2022-11-19 07:45:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 07:45:50,634 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 07:45:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:45:50,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:45:50,635 INFO L130 BoogieDeclarations]: Found specification of procedure sg_poll [2022-11-19 07:45:50,635 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_poll [2022-11-19 07:45:50,635 INFO L130 BoogieDeclarations]: Found specification of procedure __put_user_bad [2022-11-19 07:45:50,635 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_2 [2022-11-19 07:45:50,636 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_2 [2022-11-19 07:45:50,637 INFO L130 BoogieDeclarations]: Found specification of procedure max_sectors_bytes [2022-11-19 07:45:50,637 INFO L138 BoogieDeclarations]: Found implementation of procedure max_sectors_bytes [2022-11-19 07:45:50,637 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_device_put [2022-11-19 07:45:50,638 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_device_put [2022-11-19 07:45:50,638 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-19 07:45:50,638 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-19 07:45:50,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 07:45:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 07:45:50,639 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:45:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:45:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure sg_remove_request [2022-11-19 07:45:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_remove_request [2022-11-19 07:45:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-19 07:45:50,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-19 07:45:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_lock_irqsave [2022-11-19 07:45:50,641 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_lock_irqsave [2022-11-19 07:45:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure sg_common_write [2022-11-19 07:45:50,641 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_common_write [2022-11-19 07:45:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:45:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 07:45:50,642 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 07:45:50,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:45:50,643 INFO L130 BoogieDeclarations]: Found specification of procedure remove_proc_entry [2022-11-19 07:45:50,643 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_proc_entry [2022-11-19 07:45:50,643 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-19 07:45:50,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 07:45:50,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 07:45:50,643 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irq [2022-11-19 07:45:50,643 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irq [2022-11-19 07:45:50,644 INFO L130 BoogieDeclarations]: Found specification of procedure sg_proc_write_adio [2022-11-19 07:45:50,644 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_proc_write_adio [2022-11-19 07:45:50,644 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2022-11-19 07:45:50,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2022-11-19 07:45:50,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:45:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:45:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_seq_operations_7 [2022-11-19 07:45:50,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_seq_operations_7 [2022-11-19 07:45:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-19 07:45:50,645 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-19 07:45:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2022-11-19 07:45:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2022-11-19 07:45:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure __chk_range_not_ok [2022-11-19 07:45:50,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __chk_range_not_ok [2022-11-19 07:45:50,648 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-19 07:45:50,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-19 07:45:50,648 INFO L130 BoogieDeclarations]: Found specification of procedure dev_seq_stop [2022-11-19 07:45:50,648 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_seq_stop [2022-11-19 07:45:50,649 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-19 07:45:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-19 07:45:50,649 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 07:45:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 07:45:50,649 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-19 07:45:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-19 07:45:50,649 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:45:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:45:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-19 07:45:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-19 07:45:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure sg_get_rq_mark [2022-11-19 07:45:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_get_rq_mark [2022-11-19 07:45:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-19 07:45:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-19 07:45:50,652 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-19 07:45:50,655 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-19 07:45:50,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:45:50,655 INFO L130 BoogieDeclarations]: Found specification of procedure blk_trace_startstop [2022-11-19 07:45:50,655 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_trace_startstop [2022-11-19 07:45:50,656 INFO L130 BoogieDeclarations]: Found specification of procedure sg_allow_access [2022-11-19 07:45:50,656 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_allow_access [2022-11-19 07:45:50,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:45:50,659 INFO L130 BoogieDeclarations]: Found specification of procedure __rwlock_init [2022-11-19 07:45:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __rwlock_init [2022-11-19 07:45:50,659 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2022-11-19 07:45:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2022-11-19 07:45:50,660 INFO L130 BoogieDeclarations]: Found specification of procedure dev_seq_start [2022-11-19 07:45:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_seq_start [2022-11-19 07:45:50,660 INFO L130 BoogieDeclarations]: Found specification of procedure seq_open [2022-11-19 07:45:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_open [2022-11-19 07:45:50,660 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2022-11-19 07:45:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2022-11-19 07:45:50,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:45:50,660 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2022-11-19 07:45:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2022-11-19 07:45:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user [2022-11-19 07:45:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user [2022-11-19 07:45:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:45:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:45:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure sg_lookup_dev [2022-11-19 07:45:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_lookup_dev [2022-11-19 07:45:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure sg_remove_sfp_usercontext [2022-11-19 07:45:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_remove_sfp_usercontext [2022-11-19 07:45:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure sg_remove_scat [2022-11-19 07:45:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_remove_scat [2022-11-19 07:45:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure sg_fasync [2022-11-19 07:45:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_fasync [2022-11-19 07:45:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2022-11-19 07:45:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2022-11-19 07:45:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:45:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:45:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure kill_fasync [2022-11-19 07:45:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_fasync [2022-11-19 07:45:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure __get_user_bad [2022-11-19 07:45:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-11-19 07:45:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-11-19 07:45:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:45:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-19 07:45:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-19 07:45:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-19 07:45:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-19 07:45:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure seq_release [2022-11-19 07:45:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_release [2022-11-19 07:45:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_unlock_irqrestore [2022-11-19 07:45:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_unlock_irqrestore [2022-11-19 07:45:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-19 07:45:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-19 07:45:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:45:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:45:50,665 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-19 07:45:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-19 07:45:50,665 INFO L130 BoogieDeclarations]: Found specification of procedure sg_new_write [2022-11-19 07:45:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_new_write [2022-11-19 07:45:50,665 INFO L130 BoogieDeclarations]: Found specification of procedure copy_user_generic [2022-11-19 07:45:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_user_generic [2022-11-19 07:45:50,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 07:45:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 07:45:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:45:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 07:45:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 07:45:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2022-11-19 07:45:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2022-11-19 07:45:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:45:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock_irqsave [2022-11-19 07:45:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock_irqsave [2022-11-19 07:45:50,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:45:50,667 INFO L130 BoogieDeclarations]: Found specification of procedure queue_max_segments [2022-11-19 07:45:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_max_segments [2022-11-19 07:45:50,667 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:45:50,667 INFO L130 BoogieDeclarations]: Found specification of procedure sg_write [2022-11-19 07:45:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_write [2022-11-19 07:45:50,667 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:45:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:45:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure kref_init [2022-11-19 07:45:50,668 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_init [2022-11-19 07:45:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irqrestore [2022-11-19 07:45:50,668 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irqrestore [2022-11-19 07:45:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2022-11-19 07:45:50,668 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2022-11-19 07:45:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure dev_seq_next [2022-11-19 07:45:50,668 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_seq_next [2022-11-19 07:45:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure sg_new_read [2022-11-19 07:45:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_new_read [2022-11-19 07:45:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-19 07:45:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-19 07:45:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure sg_build_reserve [2022-11-19 07:45:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_build_reserve [2022-11-19 07:45:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-19 07:45:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-19 07:45:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure sg_add_request [2022-11-19 07:45:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_add_request [2022-11-19 07:45:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-19 07:45:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-19 07:45:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add_return [2022-11-19 07:45:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add_return [2022-11-19 07:45:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure sg_proc_write_dressz [2022-11-19 07:45:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_proc_write_dressz [2022-11-19 07:45:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-19 07:45:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-19 07:45:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure sg_build_indirect [2022-11-19 07:45:50,671 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_build_indirect [2022-11-19 07:45:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 07:45:50,671 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 07:45:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_from_user [2022-11-19 07:45:50,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_from_user [2022-11-19 07:45:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-11-19 07:45:50,671 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-11-19 07:45:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2022-11-19 07:45:50,672 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2022-11-19 07:45:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul_from_user [2022-11-19 07:45:50,672 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul_from_user [2022-11-19 07:45:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-19 07:45:50,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-19 07:45:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:45:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_unlock [2022-11-19 07:45:50,672 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_unlock [2022-11-19 07:45:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-19 07:45:50,673 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-19 07:45:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:45:50,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:45:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_lock [2022-11-19 07:45:50,673 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_lock [2022-11-19 07:45:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-19 07:45:50,673 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-19 07:45:51,878 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:45:51,882 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:45:52,215 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:45:52,300 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5379: SUMMARY for call __copy_to_user_nocheck_#t~ret199#1 := ldv__builtin_expect((if 0 != __copy_to_user_nocheck_~ret~2#1 then 1 else 0), 0); srcloc: null [2022-11-19 07:45:52,301 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5379-1: assume -9223372036854775808 <= __copy_to_user_nocheck_#t~ret199#1 && __copy_to_user_nocheck_#t~ret199#1 <= 9223372036854775807;__copy_to_user_nocheck_~tmp___1~4#1 := __copy_to_user_nocheck_#t~ret199#1;havoc __copy_to_user_nocheck_#t~ret199#1; [2022-11-19 07:45:52,301 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5367: SUMMARY for call __copy_to_user_nocheck_#t~ret198#1 := ldv__builtin_expect((if 0 != __copy_to_user_nocheck_~ret~2#1 then 1 else 0), 0); srcloc: null [2022-11-19 07:45:52,301 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5367-1: assume -9223372036854775808 <= __copy_to_user_nocheck_#t~ret198#1 && __copy_to_user_nocheck_#t~ret198#1 <= 9223372036854775807;__copy_to_user_nocheck_~tmp___0~8#1 := __copy_to_user_nocheck_#t~ret198#1;havoc __copy_to_user_nocheck_#t~ret198#1; [2022-11-19 07:45:52,301 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5388: assume __copy_to_user_nocheck_#t~switch197#1; [2022-11-19 07:45:52,301 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5388: assume !__copy_to_user_nocheck_#t~switch197#1; [2022-11-19 07:45:52,301 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5347: havoc __copy_to_user_nocheck_#t~switch197#1; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5380: assume 0 != __copy_to_user_nocheck_~tmp___1~4#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5380: assume !(0 != __copy_to_user_nocheck_~tmp___1~4#1);__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5376: assume __copy_to_user_nocheck_#t~switch197#1; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5376: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := true; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5368: assume 0 != __copy_to_user_nocheck_~tmp___0~8#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5368: assume !(0 != __copy_to_user_nocheck_~tmp___0~8#1);__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5364: assume __copy_to_user_nocheck_#t~switch197#1; [2022-11-19 07:45:52,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5364: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 16 == __copy_to_user_nocheck_~size#1; [2022-11-19 07:45:52,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5360: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5360: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 10 == __copy_to_user_nocheck_~size#1; [2022-11-19 07:45:52,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5389: SUMMARY for call __copy_to_user_nocheck_#t~ret200#1 := copy_user_generic(__copy_to_user_nocheck_~dst#1.base, __copy_to_user_nocheck_~dst#1.offset, __copy_to_user_nocheck_~src#1.base, __copy_to_user_nocheck_~src#1.offset, __copy_to_user_nocheck_~size#1); srcloc: null [2022-11-19 07:45:52,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5356: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5356: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 8 == __copy_to_user_nocheck_~size#1; [2022-11-19 07:45:52,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5389-1: __copy_to_user_nocheck_~tmp___2~4#1 := __copy_to_user_nocheck_#t~ret200#1;havoc __copy_to_user_nocheck_#t~ret200#1;__copy_to_user_nocheck_#res#1 := (if __copy_to_user_nocheck_~tmp___2~4#1 % 18446744073709551616 % 4294967296 <= 2147483647 then __copy_to_user_nocheck_~tmp___2~4#1 % 18446744073709551616 % 4294967296 else __copy_to_user_nocheck_~tmp___2~4#1 % 18446744073709551616 % 4294967296 - 4294967296); [2022-11-19 07:45:52,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##1: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,304 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5352: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2022-11-19 07:45:52,304 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5352: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 4 == __copy_to_user_nocheck_~size#1; [2022-11-19 07:45:52,304 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##2: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 2 == __copy_to_user_nocheck_~size#1; [2022-11-19 07:45:56,508 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5312-1: assume -9223372036854775808 <= __copy_from_user_nocheck_#t~ret193#1 && __copy_from_user_nocheck_#t~ret193#1 <= 9223372036854775807;__copy_from_user_nocheck_~tmp___1~3#1 := __copy_from_user_nocheck_#t~ret193#1;havoc __copy_from_user_nocheck_#t~ret193#1; [2022-11-19 07:45:56,508 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5312: SUMMARY for call __copy_from_user_nocheck_#t~ret193#1 := ldv__builtin_expect((if 0 != __copy_from_user_nocheck_~ret~1#1 then 1 else 0), 0); srcloc: null [2022-11-19 07:45:56,508 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5308: assume __copy_from_user_nocheck_#t~switch191#1; [2022-11-19 07:45:56,508 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5308: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := true; [2022-11-19 07:45:56,508 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5300: assume 0 != __copy_from_user_nocheck_~tmp___0~7#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,509 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5300: assume !(0 != __copy_from_user_nocheck_~tmp___0~7#1);__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,509 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5321: assume __copy_from_user_nocheck_#t~switch191#1; [2022-11-19 07:45:56,509 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5321: assume !__copy_from_user_nocheck_#t~switch191#1; [2022-11-19 07:45:56,509 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5313: assume 0 != __copy_from_user_nocheck_~tmp___1~3#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,509 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5313: assume !(0 != __copy_from_user_nocheck_~tmp___1~3#1);__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,509 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5280: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,509 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5280: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 4 == __copy_from_user_nocheck_~size#1; [2022-11-19 07:45:56,510 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5322: SUMMARY for call __copy_from_user_nocheck_#t~ret194#1 := copy_user_generic(__copy_from_user_nocheck_~dst#1.base, __copy_from_user_nocheck_~dst#1.offset, __copy_from_user_nocheck_~src#1.base, __copy_from_user_nocheck_~src#1.offset, __copy_from_user_nocheck_~size#1); srcloc: null [2022-11-19 07:45:56,510 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5322-1: __copy_from_user_nocheck_~tmp___2~3#1 := __copy_from_user_nocheck_#t~ret194#1;havoc __copy_from_user_nocheck_#t~ret194#1;__copy_from_user_nocheck_#res#1 := (if __copy_from_user_nocheck_~tmp___2~3#1 % 18446744073709551616 % 4294967296 <= 2147483647 then __copy_from_user_nocheck_~tmp___2~3#1 % 18446744073709551616 % 4294967296 else __copy_from_user_nocheck_~tmp___2~3#1 % 18446744073709551616 % 4294967296 - 4294967296); [2022-11-19 07:45:56,510 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5285: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,510 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5285: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 8 == __copy_from_user_nocheck_~size#1; [2022-11-19 07:45:56,510 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5290: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,510 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5290: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 10 == __copy_from_user_nocheck_~size#1; [2022-11-19 07:45:56,510 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##1: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2022-11-19 07:45:56,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##2: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 2 == __copy_from_user_nocheck_~size#1; [2022-11-19 07:45:56,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5274: havoc __copy_from_user_nocheck_#t~switch191#1; [2022-11-19 07:45:56,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5299: SUMMARY for call __copy_from_user_nocheck_#t~ret192#1 := ldv__builtin_expect((if 0 != __copy_from_user_nocheck_~ret~1#1 then 1 else 0), 0); srcloc: null [2022-11-19 07:45:56,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5299-1: assume -9223372036854775808 <= __copy_from_user_nocheck_#t~ret192#1 && __copy_from_user_nocheck_#t~ret192#1 <= 9223372036854775807;__copy_from_user_nocheck_~tmp___0~7#1 := __copy_from_user_nocheck_#t~ret192#1;havoc __copy_from_user_nocheck_#t~ret192#1; [2022-11-19 07:45:56,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5295: assume __copy_from_user_nocheck_#t~switch191#1; [2022-11-19 07:45:56,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L5295: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 16 == __copy_from_user_nocheck_~size#1; [2022-11-19 07:46:01,263 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:46:04,439 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:46:04,440 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:46:04,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:04 BoogieIcfgContainer [2022-11-19 07:46:04,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:46:04,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:46:04,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:46:04,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:46:04,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:45" (1/3) ... [2022-11-19 07:46:04,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200f2220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:04, skipping insertion in model container [2022-11-19 07:46:04,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49" (2/3) ... [2022-11-19 07:46:04,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200f2220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:04, skipping insertion in model container [2022-11-19 07:46:04,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:04" (3/3) ... [2022-11-19 07:46:04,455 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i [2022-11-19 07:46:04,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:46:04,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:46:04,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:46:04,607 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;@2ae0ceac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:46:04,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:46:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 1917 states, 1221 states have (on average 1.4021294021294022) internal successors, (1712), 1266 states have internal predecessors, (1712), 585 states have call successors, (585), 110 states have call predecessors, (585), 109 states have return successors, (568), 566 states have call predecessors, (568), 568 states have call successors, (568) [2022-11-19 07:46:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2022-11-19 07:46:04,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:04,657 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:04,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:04,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1860138975, now seen corresponding path program 1 times [2022-11-19 07:46:04,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:04,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388057349] [2022-11-19 07:46:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:04,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6946 trivial. 0 not checked. [2022-11-19 07:46:06,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:06,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388057349] [2022-11-19 07:46:06,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388057349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:06,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:06,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:46:06,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130283264] [2022-11-19 07:46:06,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:07,009 INFO L87 Difference]: Start difference. First operand has 1917 states, 1221 states have (on average 1.4021294021294022) internal successors, (1712), 1266 states have internal predecessors, (1712), 585 states have call successors, (585), 110 states have call predecessors, (585), 109 states have return successors, (568), 566 states have call predecessors, (568), 568 states have call successors, (568) Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2022-11-19 07:46:09,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:13,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:14,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:17,210 INFO L93 Difference]: Finished difference Result 5479 states and 8239 transitions. [2022-11-19 07:46:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:17,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 628 [2022-11-19 07:46:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:17,254 INFO L225 Difference]: With dead ends: 5479 [2022-11-19 07:46:17,255 INFO L226 Difference]: Without dead ends: 3631 [2022-11-19 07:46:17,266 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 07:46:17,270 INFO L413 NwaCegarLoop]: 3106 mSDtfsCounter, 2692 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 5473 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:17,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2694 Valid, 5473 Invalid, 641 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 637 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2022-11-19 07:46:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2022-11-19 07:46:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3627. [2022-11-19 07:46:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 2348 states have (on average 1.3960817717206133) internal successors, (3278), 2399 states have internal predecessors, (3278), 1065 states have call successors, (1065), 214 states have call predecessors, (1065), 213 states have return successors, (1065), 1058 states have call predecessors, (1065), 1063 states have call successors, (1065) [2022-11-19 07:46:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 5408 transitions. [2022-11-19 07:46:17,579 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 5408 transitions. Word has length 628 [2022-11-19 07:46:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:17,588 INFO L495 AbstractCegarLoop]: Abstraction has 3627 states and 5408 transitions. [2022-11-19 07:46:17,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2022-11-19 07:46:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 5408 transitions. [2022-11-19 07:46:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-11-19 07:46:17,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:17,619 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:46:17,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash -297461596, now seen corresponding path program 1 times [2022-11-19 07:46:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171250224] [2022-11-19 07:46:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:17,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2022-11-19 07:46:21,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171250224] [2022-11-19 07:46:21,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171250224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:21,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:21,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:46:21,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620135996] [2022-11-19 07:46:21,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:21,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:46:21,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:21,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:46:21,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:46:21,097 INFO L87 Difference]: Start difference. First operand 3627 states and 5408 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:46:23,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:28,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:31,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:33,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:38,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:39,070 INFO L93 Difference]: Finished difference Result 10626 states and 15885 transitions. [2022-11-19 07:46:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:46:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 662 [2022-11-19 07:46:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:39,112 INFO L225 Difference]: With dead ends: 10626 [2022-11-19 07:46:39,112 INFO L226 Difference]: Without dead ends: 7122 [2022-11-19 07:46:39,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:46:39,127 INFO L413 NwaCegarLoop]: 2693 mSDtfsCounter, 3372 mSDsluCounter, 3287 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 345 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3695 SdHoareTripleChecker+Valid, 5980 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:39,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3695 Valid, 5980 Invalid, 3021 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [345 Valid, 2674 Invalid, 2 Unknown, 0 Unchecked, 17.5s Time] [2022-11-19 07:46:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-11-19 07:46:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 7093. [2022-11-19 07:46:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 4613 states have (on average 1.402774766962931) internal successors, (6471), 4717 states have internal predecessors, (6471), 2060 states have call successors, (2060), 420 states have call predecessors, (2060), 419 states have return successors, (2094), 2045 states have call predecessors, (2094), 2058 states have call successors, (2094) [2022-11-19 07:46:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 10625 transitions. [2022-11-19 07:46:39,538 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 10625 transitions. Word has length 662 [2022-11-19 07:46:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:39,540 INFO L495 AbstractCegarLoop]: Abstraction has 7093 states and 10625 transitions. [2022-11-19 07:46:39,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:46:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 10625 transitions. [2022-11-19 07:46:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2022-11-19 07:46:39,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:39,561 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:39,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:46:39,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash -843485381, now seen corresponding path program 1 times [2022-11-19 07:46:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:39,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639559355] [2022-11-19 07:46:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2022-11-19 07:46:42,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639559355] [2022-11-19 07:46:42,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639559355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:42,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:42,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:46:42,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28939741] [2022-11-19 07:46:42,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:46:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:42,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:46:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:46:42,250 INFO L87 Difference]: Start difference. First operand 7093 states and 10625 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:46:43,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:46,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:54,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:46:56,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:01,601 WARN L539 Checker$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 07:47:03,616 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 07:47:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:04,395 INFO L93 Difference]: Finished difference Result 14101 states and 21104 transitions. [2022-11-19 07:47:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 660 [2022-11-19 07:47:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:04,437 INFO L225 Difference]: With dead ends: 14101 [2022-11-19 07:47:04,437 INFO L226 Difference]: Without dead ends: 7131 [2022-11-19 07:47:04,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:04,464 INFO L413 NwaCegarLoop]: 2690 mSDtfsCounter, 3549 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 2910 mSolverCounterSat, 344 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3872 SdHoareTripleChecker+Valid, 5914 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 2910 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:04,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3872 Valid, 5914 Invalid, 3258 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [344 Valid, 2910 Invalid, 4 Unknown, 0 Unchecked, 21.7s Time] [2022-11-19 07:47:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7131 states. [2022-11-19 07:47:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7131 to 7102. [2022-11-19 07:47:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7102 states, 4618 states have (on average 1.4021221307925509) internal successors, (6475), 4722 states have internal predecessors, (6475), 2060 states have call successors, (2060), 424 states have call predecessors, (2060), 423 states have return successors, (2092), 2045 states have call predecessors, (2092), 2058 states have call successors, (2092) [2022-11-19 07:47:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7102 states to 7102 states and 10627 transitions. [2022-11-19 07:47:04,948 INFO L78 Accepts]: Start accepts. Automaton has 7102 states and 10627 transitions. Word has length 660 [2022-11-19 07:47:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:04,949 INFO L495 AbstractCegarLoop]: Abstraction has 7102 states and 10627 transitions. [2022-11-19 07:47:04,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:47:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7102 states and 10627 transitions. [2022-11-19 07:47:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2022-11-19 07:47:04,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:04,971 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:04,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:47:04,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash -493407655, now seen corresponding path program 1 times [2022-11-19 07:47:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042233089] [2022-11-19 07:47:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2022-11-19 07:47:07,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:07,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042233089] [2022-11-19 07:47:07,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042233089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:07,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:07,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:47:07,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144125869] [2022-11-19 07:47:07,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:07,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:07,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:07,484 INFO L87 Difference]: Start difference. First operand 7102 states and 10627 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:47:09,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:16,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:17,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:19,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:20,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:23,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:25,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:25,881 INFO L93 Difference]: Finished difference Result 14093 states and 21084 transitions. [2022-11-19 07:47:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:25,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 659 [2022-11-19 07:47:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:25,924 INFO L225 Difference]: With dead ends: 14093 [2022-11-19 07:47:25,924 INFO L226 Difference]: Without dead ends: 7127 [2022-11-19 07:47:25,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:25,950 INFO L413 NwaCegarLoop]: 2691 mSDtfsCounter, 3365 mSDsluCounter, 3285 mSDsCounter, 0 mSdLazyCounter, 2670 mSolverCounterSat, 341 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3688 SdHoareTripleChecker+Valid, 5976 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2670 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:25,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3688 Valid, 5976 Invalid, 3013 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [341 Valid, 2670 Invalid, 2 Unknown, 0 Unchecked, 17.9s Time] [2022-11-19 07:47:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2022-11-19 07:47:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 7098. [2022-11-19 07:47:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 4616 states have (on average 1.4018630849220104) internal successors, (6471), 4720 states have internal predecessors, (6471), 2058 states have call successors, (2058), 424 states have call predecessors, (2058), 423 states have return successors, (2088), 2043 states have call predecessors, (2088), 2056 states have call successors, (2088) [2022-11-19 07:47:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 10617 transitions. [2022-11-19 07:47:26,441 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 10617 transitions. Word has length 659 [2022-11-19 07:47:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:26,442 INFO L495 AbstractCegarLoop]: Abstraction has 7098 states and 10617 transitions. [2022-11-19 07:47:26,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:47:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 10617 transitions. [2022-11-19 07:47:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2022-11-19 07:47:26,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:26,451 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:26,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:47:26,452 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash 796457762, now seen corresponding path program 1 times [2022-11-19 07:47:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816319319] [2022-11-19 07:47:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:26,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2022-11-19 07:47:28,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816319319] [2022-11-19 07:47:28,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816319319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:28,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:28,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:47:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359035116] [2022-11-19 07:47:28,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:28,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:28,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:28,807 INFO L87 Difference]: Start difference. First operand 7098 states and 10617 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:47:30,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:32,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:33,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:42,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:44,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:45,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:48,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:47:51,694 WARN L539 Checker$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 07:47:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:52,910 INFO L93 Difference]: Finished difference Result 14085 states and 21064 transitions. [2022-11-19 07:47:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 661 [2022-11-19 07:47:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:53,023 INFO L225 Difference]: With dead ends: 14085 [2022-11-19 07:47:53,030 INFO L226 Difference]: Without dead ends: 7123 [2022-11-19 07:47:53,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:53,053 INFO L413 NwaCegarLoop]: 2693 mSDtfsCounter, 2177 mSDsluCounter, 4656 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 340 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2500 SdHoareTripleChecker+Valid, 7349 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:53,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2500 Valid, 7349 Invalid, 3408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [340 Valid, 3065 Invalid, 3 Unknown, 0 Unchecked, 23.6s Time] [2022-11-19 07:47:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2022-11-19 07:47:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 7094. [2022-11-19 07:47:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 4614 states have (on average 1.4016038144776766) internal successors, (6467), 4718 states have internal predecessors, (6467), 2056 states have call successors, (2056), 424 states have call predecessors, (2056), 423 states have return successors, (2084), 2041 states have call predecessors, (2084), 2054 states have call successors, (2084) [2022-11-19 07:47:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 10607 transitions. [2022-11-19 07:47:53,458 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 10607 transitions. Word has length 661 [2022-11-19 07:47:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:53,459 INFO L495 AbstractCegarLoop]: Abstraction has 7094 states and 10607 transitions. [2022-11-19 07:47:53,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:47:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 10607 transitions. [2022-11-19 07:47:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2022-11-19 07:47:53,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:53,470 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:53,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:47:53,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1354317259, now seen corresponding path program 1 times [2022-11-19 07:47:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:53,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948282734] [2022-11-19 07:47:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:53,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6997 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6988 trivial. 0 not checked. [2022-11-19 07:47:55,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:55,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948282734] [2022-11-19 07:47:55,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948282734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:55,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632685602] [2022-11-19 07:47:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:55,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:55,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:55,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:55,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:47:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 8885 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:47:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6997 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6964 trivial. 0 not checked. [2022-11-19 07:47:58,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:58,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632685602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:58,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:58,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-11-19 07:47:58,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827095596] [2022-11-19 07:47:58,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:58,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:47:58,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:47:58,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:58,890 INFO L87 Difference]: Start difference. First operand 7094 states and 10607 transitions. Second operand has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 5 states have internal predecessors, (121), 4 states have call successors, (82), 5 states have call predecessors, (82), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2022-11-19 07:48:00,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:08,081 WARN L539 Checker$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 07:48:09,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:12,455 WARN L539 Checker$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 07:48:13,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:16,256 INFO L93 Difference]: Finished difference Result 13994 states and 20999 transitions. [2022-11-19 07:48:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:48:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 5 states have internal predecessors, (121), 4 states have call successors, (82), 5 states have call predecessors, (82), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) Word has length 700 [2022-11-19 07:48:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:16,289 INFO L225 Difference]: With dead ends: 13994 [2022-11-19 07:48:16,289 INFO L226 Difference]: Without dead ends: 7036 [2022-11-19 07:48:16,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:48:16,315 INFO L413 NwaCegarLoop]: 2494 mSDtfsCounter, 30 mSDsluCounter, 12340 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14834 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:16,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 14834 Invalid, 1999 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 1983 Invalid, 3 Unknown, 0 Unchecked, 16.8s Time] [2022-11-19 07:48:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2022-11-19 07:48:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7036. [2022-11-19 07:48:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 4584 states have (on average 1.4009598603839442) internal successors, (6422), 4678 states have internal predecessors, (6422), 2032 states have call successors, (2032), 420 states have call predecessors, (2032), 419 states have return successors, (2054), 2021 states have call predecessors, (2054), 2030 states have call successors, (2054) [2022-11-19 07:48:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10508 transitions. [2022-11-19 07:48:16,732 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10508 transitions. Word has length 700 [2022-11-19 07:48:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:16,733 INFO L495 AbstractCegarLoop]: Abstraction has 7036 states and 10508 transitions. [2022-11-19 07:48:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 5 states have internal predecessors, (121), 4 states have call successors, (82), 5 states have call predecessors, (82), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2022-11-19 07:48:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10508 transitions. [2022-11-19 07:48:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2022-11-19 07:48:16,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:16,751 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:16,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:16,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:16,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1761376110, now seen corresponding path program 1 times [2022-11-19 07:48:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:16,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795522582] [2022-11-19 07:48:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6993 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6989 trivial. 0 not checked. [2022-11-19 07:48:18,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:18,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795522582] [2022-11-19 07:48:18,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795522582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:18,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:18,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:48:18,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854533246] [2022-11-19 07:48:18,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:18,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:18,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:48:18,105 INFO L87 Difference]: Start difference. First operand 7036 states and 10508 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2022-11-19 07:48:20,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:22,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:24,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:27,799 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 07:48:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:28,553 INFO L93 Difference]: Finished difference Result 20416 states and 30478 transitions. [2022-11-19 07:48:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:28,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 760 [2022-11-19 07:48:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:28,615 INFO L225 Difference]: With dead ends: 20416 [2022-11-19 07:48:28,615 INFO L226 Difference]: Without dead ends: 13516 [2022-11-19 07:48:28,638 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 07:48:28,639 INFO L413 NwaCegarLoop]: 2972 mSDtfsCounter, 2455 mSDsluCounter, 2500 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 5472 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:28,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 5472 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 625 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2022-11-19 07:48:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13516 states. [2022-11-19 07:48:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13516 to 13504. [2022-11-19 07:48:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13504 states, 8854 states have (on average 1.406934718771177) internal successors, (12457), 9038 states have internal predecessors, (12457), 3824 states have call successors, (3824), 826 states have call predecessors, (3824), 825 states have return successors, (3868), 3799 states have call predecessors, (3868), 3822 states have call successors, (3868) [2022-11-19 07:48:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13504 states to 13504 states and 20149 transitions. [2022-11-19 07:48:29,497 INFO L78 Accepts]: Start accepts. Automaton has 13504 states and 20149 transitions. Word has length 760 [2022-11-19 07:48:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:29,498 INFO L495 AbstractCegarLoop]: Abstraction has 13504 states and 20149 transitions. [2022-11-19 07:48:29,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2022-11-19 07:48:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13504 states and 20149 transitions. [2022-11-19 07:48:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2022-11-19 07:48:29,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:29,517 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:48:29,518 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2118950388, now seen corresponding path program 1 times [2022-11-19 07:48:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:29,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253491332] [2022-11-19 07:48:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6993 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6989 trivial. 0 not checked. [2022-11-19 07:48:30,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:30,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253491332] [2022-11-19 07:48:30,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253491332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:30,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:30,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:48:30,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710427668] [2022-11-19 07:48:30,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:30,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:30,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:48:30,644 INFO L87 Difference]: Start difference. First operand 13504 states and 20149 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-19 07:48:32,689 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 07:48:37,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:38,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:48:40,907 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 07:48:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:41,693 INFO L93 Difference]: Finished difference Result 32752 states and 48575 transitions. [2022-11-19 07:48:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 784 [2022-11-19 07:48:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:41,769 INFO L225 Difference]: With dead ends: 32752 [2022-11-19 07:48:41,769 INFO L226 Difference]: Without dead ends: 19384 [2022-11-19 07:48:41,798 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 07:48:41,799 INFO L413 NwaCegarLoop]: 2817 mSDtfsCounter, 1169 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 5287 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:41,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 5287 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 680 Invalid, 3 Unknown, 0 Unchecked, 10.2s Time] [2022-11-19 07:48:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19384 states. [2022-11-19 07:48:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19384 to 19356. [2022-11-19 07:48:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19356 states, 12834 states have (on average 1.4114851176562258) internal successors, (18115), 13098 states have internal predecessors, (18115), 5198 states have call successors, (5198), 1324 states have call predecessors, (5198), 1323 states have return successors, (5272), 5165 states have call predecessors, (5272), 5196 states have call successors, (5272) [2022-11-19 07:48:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19356 states to 19356 states and 28585 transitions. [2022-11-19 07:48:42,804 INFO L78 Accepts]: Start accepts. Automaton has 19356 states and 28585 transitions. Word has length 784 [2022-11-19 07:48:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:42,806 INFO L495 AbstractCegarLoop]: Abstraction has 19356 states and 28585 transitions. [2022-11-19 07:48:42,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-19 07:48:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 19356 states and 28585 transitions. [2022-11-19 07:48:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2022-11-19 07:48:42,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:42,817 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:42,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:48:42,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:42,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:42,818 INFO L85 PathProgramCache]: Analyzing trace with hash -61882453, now seen corresponding path program 1 times [2022-11-19 07:48:42,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:42,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216798918] [2022-11-19 07:48:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:42,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2022-11-19 07:48:45,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:45,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216798918] [2022-11-19 07:48:45,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216798918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:45,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:45,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:48:45,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759894511] [2022-11-19 07:48:45,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:45,284 INFO L87 Difference]: Start difference. First operand 19356 states and 28585 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:48:47,325 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 07:48:54,314 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 07:48:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:57,140 INFO L93 Difference]: Finished difference Result 39481 states and 58125 transitions. [2022-11-19 07:48:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 754 [2022-11-19 07:48:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:57,229 INFO L225 Difference]: With dead ends: 39481 [2022-11-19 07:48:57,229 INFO L226 Difference]: Without dead ends: 20261 [2022-11-19 07:48:57,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:57,280 INFO L413 NwaCegarLoop]: 2277 mSDtfsCounter, 4390 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 666 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4725 SdHoareTripleChecker+Valid, 3091 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:57,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4725 Valid, 3091 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 1602 Invalid, 2 Unknown, 0 Unchecked, 10.9s Time] [2022-11-19 07:48:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20261 states. [2022-11-19 07:48:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20261 to 20244. [2022-11-19 07:48:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20244 states, 13382 states have (on average 1.4053953071289793) internal successors, (18807), 13658 states have internal predecessors, (18807), 5410 states have call successors, (5410), 1448 states have call predecessors, (5410), 1451 states have return successors, (5484), 5377 states have call predecessors, (5484), 5408 states have call successors, (5484) [2022-11-19 07:48:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20244 states to 20244 states and 29701 transitions. [2022-11-19 07:48:58,511 INFO L78 Accepts]: Start accepts. Automaton has 20244 states and 29701 transitions. Word has length 754 [2022-11-19 07:48:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:58,512 INFO L495 AbstractCegarLoop]: Abstraction has 20244 states and 29701 transitions. [2022-11-19 07:48:58,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:48:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20244 states and 29701 transitions. [2022-11-19 07:48:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2022-11-19 07:48:58,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:58,524 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:58,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:48:58,524 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1650352076, now seen corresponding path program 1 times [2022-11-19 07:48:58,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:58,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625436224] [2022-11-19 07:48:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:58,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2022-11-19 07:49:01,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:01,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625436224] [2022-11-19 07:49:01,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625436224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:01,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:01,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:49:01,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856510477] [2022-11-19 07:49:01,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:01,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:49:01,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:49:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:49:01,048 INFO L87 Difference]: Start difference. First operand 20244 states and 29701 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:49:03,099 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 07:49:08,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:10,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:12,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:14,039 WARN L539 Checker$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 07:49:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:15,551 INFO L93 Difference]: Finished difference Result 40337 states and 59169 transitions. [2022-11-19 07:49:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:49:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 752 [2022-11-19 07:49:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:15,632 INFO L225 Difference]: With dead ends: 40337 [2022-11-19 07:49:15,632 INFO L226 Difference]: Without dead ends: 20229 [2022-11-19 07:49:15,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:49:15,682 INFO L413 NwaCegarLoop]: 2160 mSDtfsCounter, 4415 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 660 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4747 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:15,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4747 Valid, 2739 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 1528 Invalid, 2 Unknown, 0 Unchecked, 13.3s Time] [2022-11-19 07:49:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20229 states. [2022-11-19 07:49:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20229 to 20212. [2022-11-19 07:49:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20212 states, 13366 states have (on average 1.404683525362861) internal successors, (18775), 13642 states have internal predecessors, (18775), 5394 states have call successors, (5394), 1448 states have call predecessors, (5394), 1451 states have return successors, (5460), 5361 states have call predecessors, (5460), 5392 states have call successors, (5460) [2022-11-19 07:49:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20212 states to 20212 states and 29629 transitions. [2022-11-19 07:49:17,216 INFO L78 Accepts]: Start accepts. Automaton has 20212 states and 29629 transitions. Word has length 752 [2022-11-19 07:49:17,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:17,217 INFO L495 AbstractCegarLoop]: Abstraction has 20212 states and 29629 transitions. [2022-11-19 07:49:17,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:49:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 20212 states and 29629 transitions. [2022-11-19 07:49:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-11-19 07:49:17,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:17,228 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:49:17,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:49:17,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash -830122266, now seen corresponding path program 1 times [2022-11-19 07:49:17,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:17,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897216091] [2022-11-19 07:49:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:17,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2022-11-19 07:49:19,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:19,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897216091] [2022-11-19 07:49:19,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897216091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:19,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:19,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:49:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197381344] [2022-11-19 07:49:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:49:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:49:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:49:19,311 INFO L87 Difference]: Start difference. First operand 20212 states and 29629 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:49:21,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:28,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:29,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:31,510 WARN L539 Checker$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 07:49:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:35,736 INFO L93 Difference]: Finished difference Result 40273 states and 59025 transitions. [2022-11-19 07:49:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:49:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 756 [2022-11-19 07:49:35,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:35,805 INFO L225 Difference]: With dead ends: 40273 [2022-11-19 07:49:35,806 INFO L226 Difference]: Without dead ends: 20197 [2022-11-19 07:49:35,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:49:35,846 INFO L413 NwaCegarLoop]: 2157 mSDtfsCounter, 1999 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 333 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2330 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:35,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2330 Valid, 3284 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2382 Invalid, 2 Unknown, 0 Unchecked, 15.0s Time] [2022-11-19 07:49:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20197 states. [2022-11-19 07:49:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20197 to 20180. [2022-11-19 07:49:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20180 states, 13350 states have (on average 1.4039700374531836) internal successors, (18743), 13626 states have internal predecessors, (18743), 5378 states have call successors, (5378), 1448 states have call predecessors, (5378), 1451 states have return successors, (5436), 5345 states have call predecessors, (5436), 5376 states have call successors, (5436) [2022-11-19 07:49:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20180 states to 20180 states and 29557 transitions. [2022-11-19 07:49:37,444 INFO L78 Accepts]: Start accepts. Automaton has 20180 states and 29557 transitions. Word has length 756 [2022-11-19 07:49:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:37,445 INFO L495 AbstractCegarLoop]: Abstraction has 20180 states and 29557 transitions. [2022-11-19 07:49:37,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:49:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20180 states and 29557 transitions. [2022-11-19 07:49:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2022-11-19 07:49:37,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:37,457 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:49:37,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:49:37,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash 502812037, now seen corresponding path program 1 times [2022-11-19 07:49:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:37,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567496090] [2022-11-19 07:49:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:37,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2022-11-19 07:49:39,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:39,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567496090] [2022-11-19 07:49:39,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567496090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:39,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:39,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:49:39,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438944457] [2022-11-19 07:49:39,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:39,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:49:39,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:39,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:49:39,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:49:39,317 INFO L87 Difference]: Start difference. First operand 20180 states and 29557 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:49:41,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:47,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:49,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:49:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:52,277 INFO L93 Difference]: Finished difference Result 39825 states and 58381 transitions. [2022-11-19 07:49:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:49:52,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 754 [2022-11-19 07:49:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:52,345 INFO L225 Difference]: With dead ends: 39825 [2022-11-19 07:49:52,345 INFO L226 Difference]: Without dead ends: 19781 [2022-11-19 07:49:52,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:49:52,400 INFO L413 NwaCegarLoop]: 2148 mSDtfsCounter, 2991 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 656 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3321 SdHoareTripleChecker+Valid, 2911 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:52,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3321 Valid, 2911 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 1525 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-11-19 07:49:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2022-11-19 07:49:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 19764. [2022-11-19 07:49:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19764 states, 13108 states have (on average 1.4063930424168447) internal successors, (18435), 13376 states have internal predecessors, (18435), 5256 states have call successors, (5256), 1396 states have call predecessors, (5256), 1399 states have return successors, (5294), 5225 states have call predecessors, (5294), 5254 states have call successors, (5294) [2022-11-19 07:49:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19764 states to 19764 states and 28985 transitions. [2022-11-19 07:49:53,724 INFO L78 Accepts]: Start accepts. Automaton has 19764 states and 28985 transitions. Word has length 754 [2022-11-19 07:49:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:53,724 INFO L495 AbstractCegarLoop]: Abstraction has 19764 states and 28985 transitions. [2022-11-19 07:49:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2022-11-19 07:49:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 19764 states and 28985 transitions. [2022-11-19 07:49:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2022-11-19 07:49:53,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:53,763 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:49:53,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:49:53,763 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1416815997, now seen corresponding path program 1 times [2022-11-19 07:49:53,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:53,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38197043] [2022-11-19 07:49:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:53,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13192 trivial. 0 not checked. [2022-11-19 07:49:59,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:59,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38197043] [2022-11-19 07:49:59,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38197043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258720362] [2022-11-19 07:49:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:59,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:59,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:59,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:50:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 10602 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:50:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2022-11-19 07:50:02,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:50:02,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258720362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:02,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:50:02,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-19 07:50:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641209260] [2022-11-19 07:50:02,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:02,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:50:02,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:50:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:50:02,816 INFO L87 Difference]: Start difference. First operand 19764 states and 28985 transitions. Second operand has 5 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2022-11-19 07:50:04,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:11,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:13,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:14,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:16,408 WARN L539 Checker$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 07:50:18,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:20,379 WARN L539 Checker$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 07:50:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:22,603 INFO L93 Difference]: Finished difference Result 50488 states and 76106 transitions. [2022-11-19 07:50:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:50:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) Word has length 990 [2022-11-19 07:50:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:22,685 INFO L225 Difference]: With dead ends: 50488 [2022-11-19 07:50:22,685 INFO L226 Difference]: Without dead ends: 30860 [2022-11-19 07:50:22,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:50:22,735 INFO L413 NwaCegarLoop]: 3717 mSDtfsCounter, 1065 mSDsluCounter, 10105 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 13822 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:22,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 13822 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1502 Invalid, 3 Unknown, 0 Unchecked, 17.7s Time] [2022-11-19 07:50:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30860 states. [2022-11-19 07:50:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30860 to 19528. [2022-11-19 07:50:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19528 states, 12992 states have (on average 1.4083282019704433) internal successors, (18297), 13256 states have internal predecessors, (18297), 5160 states have call successors, (5160), 1372 states have call predecessors, (5160), 1375 states have return successors, (5190), 5131 states have call predecessors, (5190), 5158 states have call successors, (5190) [2022-11-19 07:50:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19528 states to 19528 states and 28647 transitions. [2022-11-19 07:50:24,333 INFO L78 Accepts]: Start accepts. Automaton has 19528 states and 28647 transitions. Word has length 990 [2022-11-19 07:50:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:24,334 INFO L495 AbstractCegarLoop]: Abstraction has 19528 states and 28647 transitions. [2022-11-19 07:50:24,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2022-11-19 07:50:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 19528 states and 28647 transitions. [2022-11-19 07:50:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2022-11-19 07:50:24,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:24,374 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:24,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:50:24,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:50:24,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1796494107, now seen corresponding path program 1 times [2022-11-19 07:50:24,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:24,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474709086] [2022-11-19 07:50:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:24,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2022-11-19 07:50:26,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:26,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474709086] [2022-11-19 07:50:26,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474709086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:26,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:50:26,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:50:26,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139918024] [2022-11-19 07:50:26,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:50:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:50:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:50:26,516 INFO L87 Difference]: Start difference. First operand 19528 states and 28647 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2022-11-19 07:50:28,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:32,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:34,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:35,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:36,963 INFO L93 Difference]: Finished difference Result 38968 states and 57220 transitions. [2022-11-19 07:50:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:50:36,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1014 [2022-11-19 07:50:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:37,014 INFO L225 Difference]: With dead ends: 38968 [2022-11-19 07:50:37,014 INFO L226 Difference]: Without dead ends: 19544 [2022-11-19 07:50:37,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:50:37,048 INFO L413 NwaCegarLoop]: 2460 mSDtfsCounter, 2 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4909 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:37,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4909 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 622 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-11-19 07:50:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19544 states. [2022-11-19 07:50:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19544 to 19528. [2022-11-19 07:50:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19528 states, 12992 states have (on average 1.4070966748768472) internal successors, (18281), 13256 states have internal predecessors, (18281), 5160 states have call successors, (5160), 1372 states have call predecessors, (5160), 1375 states have return successors, (5190), 5131 states have call predecessors, (5190), 5158 states have call successors, (5190) [2022-11-19 07:50:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19528 states to 19528 states and 28631 transitions. [2022-11-19 07:50:38,423 INFO L78 Accepts]: Start accepts. Automaton has 19528 states and 28631 transitions. Word has length 1014 [2022-11-19 07:50:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:38,425 INFO L495 AbstractCegarLoop]: Abstraction has 19528 states and 28631 transitions. [2022-11-19 07:50:38,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2022-11-19 07:50:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 19528 states and 28631 transitions. [2022-11-19 07:50:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2022-11-19 07:50:38,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:38,452 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:38,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:50:38,452 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:38,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1280216768, now seen corresponding path program 1 times [2022-11-19 07:50:38,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:38,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201824156] [2022-11-19 07:50:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:38,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2022-11-19 07:50:40,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:40,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201824156] [2022-11-19 07:50:40,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201824156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:40,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:50:40,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:50:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804521665] [2022-11-19 07:50:40,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:40,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:50:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:50:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:50:40,130 INFO L87 Difference]: Start difference. First operand 19528 states and 28631 transitions. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2022-11-19 07:50:42,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:47,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:49,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:51,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:53,392 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 07:50:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:55,072 INFO L93 Difference]: Finished difference Result 38968 states and 57188 transitions. [2022-11-19 07:50:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:50:55,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1015 [2022-11-19 07:50:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:55,125 INFO L225 Difference]: With dead ends: 38968 [2022-11-19 07:50:55,125 INFO L226 Difference]: Without dead ends: 19544 [2022-11-19 07:50:55,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:50:55,161 INFO L413 NwaCegarLoop]: 2455 mSDtfsCounter, 16 mSDsluCounter, 4887 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 7342 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:55,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 7342 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 936 Invalid, 3 Unknown, 0 Unchecked, 13.6s Time] [2022-11-19 07:50:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19544 states. [2022-11-19 07:50:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19544 to 19528. [2022-11-19 07:50:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19528 states, 12992 states have (on average 1.4058651477832513) internal successors, (18265), 13256 states have internal predecessors, (18265), 5160 states have call successors, (5160), 1372 states have call predecessors, (5160), 1375 states have return successors, (5190), 5131 states have call predecessors, (5190), 5158 states have call successors, (5190) [2022-11-19 07:50:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19528 states to 19528 states and 28615 transitions. [2022-11-19 07:50:56,519 INFO L78 Accepts]: Start accepts. Automaton has 19528 states and 28615 transitions. Word has length 1015 [2022-11-19 07:50:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:56,519 INFO L495 AbstractCegarLoop]: Abstraction has 19528 states and 28615 transitions. [2022-11-19 07:50:56,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2022-11-19 07:50:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 19528 states and 28615 transitions. [2022-11-19 07:50:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2022-11-19 07:50:56,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:56,539 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:56,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:50:56,539 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1377665498, now seen corresponding path program 1 times [2022-11-19 07:50:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126821389] [2022-11-19 07:50:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2022-11-19 07:50:58,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126821389] [2022-11-19 07:50:58,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126821389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:58,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:50:58,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:50:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246365637] [2022-11-19 07:50:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:58,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:50:58,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:58,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:50:58,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:50:58,101 INFO L87 Difference]: Start difference. First operand 19528 states and 28615 transitions. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2022-11-19 07:51:00,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:05,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:06,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:08,578 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 07:51:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:09,884 INFO L93 Difference]: Finished difference Result 38968 states and 57156 transitions. [2022-11-19 07:51:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:51:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1017 [2022-11-19 07:51:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:09,927 INFO L225 Difference]: With dead ends: 38968 [2022-11-19 07:51:09,927 INFO L226 Difference]: Without dead ends: 19544 [2022-11-19 07:51:09,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:51:09,952 INFO L413 NwaCegarLoop]: 2454 mSDtfsCounter, 14 mSDsluCounter, 4887 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7341 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:09,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 7341 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 933 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2022-11-19 07:51:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19544 states. [2022-11-19 07:51:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19544 to 19528. [2022-11-19 07:51:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19528 states, 12992 states have (on average 1.4046336206896552) internal successors, (18249), 13256 states have internal predecessors, (18249), 5160 states have call successors, (5160), 1372 states have call predecessors, (5160), 1375 states have return successors, (5190), 5131 states have call predecessors, (5190), 5158 states have call successors, (5190) [2022-11-19 07:51:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19528 states to 19528 states and 28599 transitions. [2022-11-19 07:51:11,293 INFO L78 Accepts]: Start accepts. Automaton has 19528 states and 28599 transitions. Word has length 1017 [2022-11-19 07:51:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:11,294 INFO L495 AbstractCegarLoop]: Abstraction has 19528 states and 28599 transitions. [2022-11-19 07:51:11,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2022-11-19 07:51:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 19528 states and 28599 transitions. [2022-11-19 07:51:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1017 [2022-11-19 07:51:11,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:11,313 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:51:11,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:51:11,314 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1442781026, now seen corresponding path program 1 times [2022-11-19 07:51:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836336250] [2022-11-19 07:51:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:11,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13192 trivial. 0 not checked. [2022-11-19 07:51:16,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:16,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836336250] [2022-11-19 07:51:16,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836336250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:16,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588913606] [2022-11-19 07:51:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:16,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:16,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:16,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:16,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:51:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 10786 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:51:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 13174 trivial. 0 not checked. [2022-11-19 07:51:20,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:51:20,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588913606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:20,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:51:20,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:51:20,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314713956] [2022-11-19 07:51:20,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:20,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:51:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:20,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:51:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:51:20,297 INFO L87 Difference]: Start difference. First operand 19528 states and 28599 transitions. Second operand has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 7 states have internal predecessors, (205), 5 states have call successors, (113), 2 states have call predecessors, (113), 5 states have return successors, (110), 6 states have call predecessors, (110), 5 states have call successors, (110) [2022-11-19 07:51:22,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:30,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:32,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:33,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:35,863 WARN L539 Checker$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 07:51:37,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:39,898 WARN L539 Checker$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 07:51:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:41,577 INFO L93 Difference]: Finished difference Result 29696 states and 43438 transitions. [2022-11-19 07:51:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:51:41,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 7 states have internal predecessors, (205), 5 states have call successors, (113), 2 states have call predecessors, (113), 5 states have return successors, (110), 6 states have call predecessors, (110), 5 states have call successors, (110) Word has length 1016 [2022-11-19 07:51:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:41,660 INFO L225 Difference]: With dead ends: 29696 [2022-11-19 07:51:41,660 INFO L226 Difference]: Without dead ends: 19480 [2022-11-19 07:51:41,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 1022 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:51:41,692 INFO L413 NwaCegarLoop]: 2454 mSDtfsCounter, 8 mSDsluCounter, 12203 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14657 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:41,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14657 Invalid, 1909 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 1901 Invalid, 4 Unknown, 0 Unchecked, 19.9s Time] [2022-11-19 07:51:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19480 states. [2022-11-19 07:51:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19480 to 19480. [2022-11-19 07:51:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19480 states, 12974 states have (on average 1.4048866964698628) internal successors, (18227), 13242 states have internal predecessors, (18227), 5136 states have call successors, (5136), 1358 states have call predecessors, (5136), 1369 states have return successors, (5170), 5111 states have call predecessors, (5170), 5134 states have call successors, (5170) [2022-11-19 07:51:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19480 states to 19480 states and 28533 transitions. [2022-11-19 07:51:43,371 INFO L78 Accepts]: Start accepts. Automaton has 19480 states and 28533 transitions. Word has length 1016 [2022-11-19 07:51:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:43,372 INFO L495 AbstractCegarLoop]: Abstraction has 19480 states and 28533 transitions. [2022-11-19 07:51:43,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 7 states have internal predecessors, (205), 5 states have call successors, (113), 2 states have call predecessors, (113), 5 states have return successors, (110), 6 states have call predecessors, (110), 5 states have call successors, (110) [2022-11-19 07:51:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 19480 states and 28533 transitions. [2022-11-19 07:51:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2022-11-19 07:51:43,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:43,397 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:51:43,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:43,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:51:43,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash 244655857, now seen corresponding path program 1 times [2022-11-19 07:51:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859649103] [2022-11-19 07:51:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13199 trivial. 0 not checked. [2022-11-19 07:51:44,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:44,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859649103] [2022-11-19 07:51:44,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859649103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:44,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:44,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:51:44,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480761296] [2022-11-19 07:51:44,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:44,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:44,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:44,756 INFO L87 Difference]: Start difference. First operand 19480 states and 28533 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2022-11-19 07:51:46,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:50,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:52,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:56,101 WARN L539 Checker$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 07:51:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:57,228 INFO L93 Difference]: Finished difference Result 48240 states and 70229 transitions. [2022-11-19 07:51:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:51:57,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 984 [2022-11-19 07:51:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:57,340 INFO L225 Difference]: With dead ends: 48240 [2022-11-19 07:51:57,340 INFO L226 Difference]: Without dead ends: 28736 [2022-11-19 07:51:57,392 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 07:51:57,393 INFO L413 NwaCegarLoop]: 3433 mSDtfsCounter, 1857 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 5586 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:57,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1858 Valid, 5586 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 758 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2022-11-19 07:51:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28736 states. [2022-11-19 07:51:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28736 to 28728. [2022-11-19 07:51:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28728 states, 19226 states have (on average 1.3994070529491314) internal successors, (26905), 19590 states have internal predecessors, (26905), 7320 states have call successors, (7320), 2166 states have call predecessors, (7320), 2181 states have return successors, (7362), 7291 states have call predecessors, (7362), 7318 states have call successors, (7362) [2022-11-19 07:51:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28728 states to 28728 states and 41587 transitions. [2022-11-19 07:51:59,453 INFO L78 Accepts]: Start accepts. Automaton has 28728 states and 41587 transitions. Word has length 984 [2022-11-19 07:51:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:59,454 INFO L495 AbstractCegarLoop]: Abstraction has 28728 states and 41587 transitions. [2022-11-19 07:51:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2022-11-19 07:51:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28728 states and 41587 transitions. [2022-11-19 07:51:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2022-11-19 07:51:59,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:59,493 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:51:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:51:59,493 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1919380295, now seen corresponding path program 1 times [2022-11-19 07:51:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:59,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119793636] [2022-11-19 07:51:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:59,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 13206 trivial. 0 not checked. [2022-11-19 07:52:03,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119793636] [2022-11-19 07:52:03,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119793636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990576557] [2022-11-19 07:52:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:03,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:03,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:03,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:03,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:52:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 10599 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:52:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 4696 proven. 0 refuted. 0 times theorem prover too weak. 8541 trivial. 0 not checked. [2022-11-19 07:52:07,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:52:07,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990576557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:07,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:52:07,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-19 07:52:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788690220] [2022-11-19 07:52:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:07,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:52:07,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:07,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:52:07,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:52:07,565 INFO L87 Difference]: Start difference. First operand 28728 states and 41587 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (106), 2 states have call predecessors, (106), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2022-11-19 07:52:09,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:13,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:15,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:17,082 WARN L539 Checker$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 07:52:19,109 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 07:52:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:22,102 INFO L93 Difference]: Finished difference Result 57404 states and 83101 transitions. [2022-11-19 07:52:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:52:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (106), 2 states have call predecessors, (106), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 1002 [2022-11-19 07:52:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:22,205 INFO L225 Difference]: With dead ends: 57404 [2022-11-19 07:52:22,206 INFO L226 Difference]: Without dead ends: 28764 [2022-11-19 07:52:22,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1010 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:52:22,282 INFO L413 NwaCegarLoop]: 2457 mSDtfsCounter, 14 mSDsluCounter, 4911 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7368 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:22,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7368 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2022-11-19 07:52:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28764 states. [2022-11-19 07:52:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28764 to 28447. [2022-11-19 07:52:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28447 states, 19049 states have (on average 1.4000734946716362) internal successors, (26670), 19397 states have internal predecessors, (26670), 7256 states have call successors, (7256), 2126 states have call predecessors, (7256), 2141 states have return successors, (7298), 7219 states have call predecessors, (7298), 7254 states have call successors, (7298) [2022-11-19 07:52:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28447 states to 28447 states and 41224 transitions. [2022-11-19 07:52:24,324 INFO L78 Accepts]: Start accepts. Automaton has 28447 states and 41224 transitions. Word has length 1002 [2022-11-19 07:52:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:24,325 INFO L495 AbstractCegarLoop]: Abstraction has 28447 states and 41224 transitions. [2022-11-19 07:52:24,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (106), 2 states have call predecessors, (106), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2022-11-19 07:52:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 28447 states and 41224 transitions. [2022-11-19 07:52:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2022-11-19 07:52:24,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:24,351 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:52:24,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:52:24,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:24,553 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash -756564037, now seen corresponding path program 1 times [2022-11-19 07:52:24,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:24,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774814532] [2022-11-19 07:52:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:24,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 13206 trivial. 0 not checked. [2022-11-19 07:52:29,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774814532] [2022-11-19 07:52:29,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774814532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899123627] [2022-11-19 07:52:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:29,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:29,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:29,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:52:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 10736 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:52:33,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 4704 proven. 0 refuted. 0 times theorem prover too weak. 8533 trivial. 0 not checked. [2022-11-19 07:52:34,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:52:34,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899123627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:34,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:52:34,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-19 07:52:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776439411] [2022-11-19 07:52:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:34,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:52:34,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:52:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:52:34,437 INFO L87 Difference]: Start difference. First operand 28447 states and 41224 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (111), 3 states have call predecessors, (111), 3 states have return successors, (108), 3 states have call predecessors, (108), 3 states have call successors, (108) [2022-11-19 07:52:36,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:41,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:43,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:45,767 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 07:52:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:53,426 INFO L93 Difference]: Finished difference Result 66156 states and 96553 transitions. [2022-11-19 07:52:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:52:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (111), 3 states have call predecessors, (111), 3 states have return successors, (108), 3 states have call predecessors, (108), 3 states have call successors, (108) Word has length 1025 [2022-11-19 07:52:53,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:53,562 INFO L225 Difference]: With dead ends: 66156 [2022-11-19 07:52:53,562 INFO L226 Difference]: Without dead ends: 37725 [2022-11-19 07:52:53,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 1033 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:52:53,643 INFO L413 NwaCegarLoop]: 4077 mSDtfsCounter, 2402 mSDsluCounter, 4882 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 48 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 8959 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:53,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2547 Valid, 8959 Invalid, 2346 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [48 Valid, 2295 Invalid, 3 Unknown, 0 Unchecked, 15.9s Time] [2022-11-19 07:52:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37725 states. [2022-11-19 07:52:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37725 to 33607. [2022-11-19 07:52:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33607 states, 22701 states have (on average 1.406634068983745) internal successors, (31932), 23105 states have internal predecessors, (31932), 8376 states have call successors, (8376), 2514 states have call predecessors, (8376), 2529 states have return successors, (8418), 8335 states have call predecessors, (8418), 8374 states have call successors, (8418) [2022-11-19 07:52:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33607 states to 33607 states and 48726 transitions. [2022-11-19 07:52:56,342 INFO L78 Accepts]: Start accepts. Automaton has 33607 states and 48726 transitions. Word has length 1025 [2022-11-19 07:52:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:56,343 INFO L495 AbstractCegarLoop]: Abstraction has 33607 states and 48726 transitions. [2022-11-19 07:52:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (111), 3 states have call predecessors, (111), 3 states have return successors, (108), 3 states have call predecessors, (108), 3 states have call successors, (108) [2022-11-19 07:52:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 33607 states and 48726 transitions. [2022-11-19 07:52:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2022-11-19 07:52:56,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:56,377 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:52:56,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:56,591 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash -962716158, now seen corresponding path program 1 times [2022-11-19 07:52:56,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029063574] [2022-11-19 07:52:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:56,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13264 trivial. 0 not checked. [2022-11-19 07:52:58,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029063574] [2022-11-19 07:52:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029063574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:58,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:58,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108504215] [2022-11-19 07:52:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:58,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:58,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:58,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:58,383 INFO L87 Difference]: Start difference. First operand 33607 states and 48726 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2022-11-19 07:53:00,434 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 07:53:03,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:04,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:09,550 INFO L93 Difference]: Finished difference Result 66913 states and 96942 transitions. [2022-11-19 07:53:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:09,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) Word has length 1084 [2022-11-19 07:53:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:09,645 INFO L225 Difference]: With dead ends: 66913 [2022-11-19 07:53:09,645 INFO L226 Difference]: Without dead ends: 32334 [2022-11-19 07:53:09,700 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 07:53:09,702 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 2397 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:09,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2399 Valid, 4405 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 581 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-11-19 07:53:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32334 states. [2022-11-19 07:53:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32334 to 32287. [2022-11-19 07:53:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32287 states, 21843 states have (on average 1.4043858444352881) internal successors, (30676), 22204 states have internal predecessors, (30676), 7981 states have call successors, (7981), 2447 states have call predecessors, (7981), 2462 states have return successors, (8023), 7967 states have call predecessors, (8023), 7979 states have call successors, (8023) [2022-11-19 07:53:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32287 states to 32287 states and 46680 transitions. [2022-11-19 07:53:12,248 INFO L78 Accepts]: Start accepts. Automaton has 32287 states and 46680 transitions. Word has length 1084 [2022-11-19 07:53:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:12,251 INFO L495 AbstractCegarLoop]: Abstraction has 32287 states and 46680 transitions. [2022-11-19 07:53:12,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2022-11-19 07:53:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 32287 states and 46680 transitions. [2022-11-19 07:53:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1090 [2022-11-19 07:53:12,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:12,291 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:53:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:53:12,291 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1934655815, now seen corresponding path program 1 times [2022-11-19 07:53:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622949479] [2022-11-19 07:53:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13280 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13266 trivial. 0 not checked. [2022-11-19 07:53:15,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:15,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622949479] [2022-11-19 07:53:15,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622949479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:53:15,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608712258] [2022-11-19 07:53:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:15,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:15,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:15,183 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:15,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:53:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 10953 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:53:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13280 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13212 trivial. 0 not checked. [2022-11-19 07:53:19,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:53:19,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608712258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:19,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:53:19,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-19 07:53:19,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355821397] [2022-11-19 07:53:19,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:19,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:53:19,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:53:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:53:19,283 INFO L87 Difference]: Start difference. First operand 32287 states and 46680 transitions. Second operand has 5 states, 5 states have (on average 47.2) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (126), 2 states have call predecessors, (126), 3 states have return successors, (125), 3 states have call predecessors, (125), 2 states have call successors, (125) [2022-11-19 07:53:21,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:24,683 WARN L539 Checker$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 07:53:26,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:27,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:30,583 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 07:53:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:36,355 INFO L93 Difference]: Finished difference Result 64094 states and 92686 transitions. [2022-11-19 07:53:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:53:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.2) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (126), 2 states have call predecessors, (126), 3 states have return successors, (125), 3 states have call predecessors, (125), 2 states have call successors, (125) Word has length 1089 [2022-11-19 07:53:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:36,437 INFO L225 Difference]: With dead ends: 64094 [2022-11-19 07:53:36,437 INFO L226 Difference]: Without dead ends: 32511 [2022-11-19 07:53:36,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1095 GetRequests, 1087 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:53:36,489 INFO L413 NwaCegarLoop]: 2459 mSDtfsCounter, 6 mSDsluCounter, 7367 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9826 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:36,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9826 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1233 Invalid, 3 Unknown, 0 Unchecked, 14.6s Time] [2022-11-19 07:53:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32511 states. [2022-11-19 07:53:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32511 to 32351. [2022-11-19 07:53:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32351 states, 21891 states have (on average 1.4034991549038418) internal successors, (30724), 22252 states have internal predecessors, (30724), 7981 states have call successors, (7981), 2447 states have call predecessors, (7981), 2478 states have return successors, (8055), 7983 states have call predecessors, (8055), 7979 states have call successors, (8055) [2022-11-19 07:53:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32351 states to 32351 states and 46760 transitions. [2022-11-19 07:53:38,821 INFO L78 Accepts]: Start accepts. Automaton has 32351 states and 46760 transitions. Word has length 1089 [2022-11-19 07:53:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:38,823 INFO L495 AbstractCegarLoop]: Abstraction has 32351 states and 46760 transitions. [2022-11-19 07:53:38,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.2) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (126), 2 states have call predecessors, (126), 3 states have return successors, (125), 3 states have call predecessors, (125), 2 states have call successors, (125) [2022-11-19 07:53:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 32351 states and 46760 transitions. [2022-11-19 07:53:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2022-11-19 07:53:39,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:39,019 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:53:39,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:39,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:39,233 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash 600833581, now seen corresponding path program 1 times [2022-11-19 07:53:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:39,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870004600] [2022-11-19 07:53:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:39,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13249 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 13227 trivial. 0 not checked. [2022-11-19 07:53:52,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:52,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870004600] [2022-11-19 07:53:52,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870004600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:53:52,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550059478] [2022-11-19 07:53:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:52,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:52,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:52,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:54:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 11073 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:54:04,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13249 backedges. 4904 proven. 0 refuted. 0 times theorem prover too weak. 8345 trivial. 0 not checked. [2022-11-19 07:54:05,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:54:05,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550059478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:05,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:54:05,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-11-19 07:54:05,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424558427] [2022-11-19 07:54:05,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:54:05,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:05,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:54:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:54:05,245 INFO L87 Difference]: Start difference. First operand 32351 states and 46760 transitions. Second operand has 6 states, 4 states have (on average 56.0) internal successors, (224), 6 states have internal predecessors, (224), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2022-11-19 07:54:07,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:54:11,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:54:13,366 WARN L539 Checker$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 07:54:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:20,835 INFO L93 Difference]: Finished difference Result 64706 states and 93995 transitions. [2022-11-19 07:54:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:54:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 56.0) internal successors, (224), 6 states have internal predecessors, (224), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 1075 [2022-11-19 07:54:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:20,922 INFO L225 Difference]: With dead ends: 64706 [2022-11-19 07:54:20,922 INFO L226 Difference]: Without dead ends: 32384 [2022-11-19 07:54:20,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:54:20,982 INFO L413 NwaCegarLoop]: 2421 mSDtfsCounter, 3 mSDsluCounter, 9606 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12027 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:20,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12027 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1759 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2022-11-19 07:54:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2022-11-19 07:54:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 32384. [2022-11-19 07:54:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32384 states, 21924 states have (on average 1.4028918080642219) internal successors, (30757), 22285 states have internal predecessors, (30757), 7981 states have call successors, (7981), 2447 states have call predecessors, (7981), 2478 states have return successors, (8055), 7983 states have call predecessors, (8055), 7979 states have call successors, (8055) [2022-11-19 07:54:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32384 states to 32384 states and 46793 transitions. [2022-11-19 07:54:23,479 INFO L78 Accepts]: Start accepts. Automaton has 32384 states and 46793 transitions. Word has length 1075 [2022-11-19 07:54:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:23,480 INFO L495 AbstractCegarLoop]: Abstraction has 32384 states and 46793 transitions. [2022-11-19 07:54:23,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 56.0) internal successors, (224), 6 states have internal predecessors, (224), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2022-11-19 07:54:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32384 states and 46793 transitions. [2022-11-19 07:54:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2022-11-19 07:54:23,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:23,536 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:23,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:23,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:23,764 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 194784571, now seen corresponding path program 1 times [2022-11-19 07:54:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966080956] [2022-11-19 07:54:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:23,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14866 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 14835 trivial. 0 not checked. [2022-11-19 07:54:29,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:29,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966080956] [2022-11-19 07:54:29,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966080956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061273053] [2022-11-19 07:54:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:29,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:29,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:29,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49f90c3b-2ba7-4ab5-b16f-d540bc0765b0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:54:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:34,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 11574 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-19 07:54:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14866 backedges. 4711 proven. 16 refuted. 0 times theorem prover too weak. 10139 trivial. 0 not checked. [2022-11-19 07:54:38,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:39,495 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14299 disjunctions. This might take some time... [2022-11-19 07:54:57,900 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 14299 disjunctions.