./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--watchdog--pc87413_wdt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8954b1975c9ef274050a4ed05b880cddaf4747278343623028f38a4ef8e6ca73 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:23:06,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:06,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:06,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:06,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:06,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:06,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:06,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:06,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:06,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:06,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:06,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:06,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:06,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:06,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:06,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:06,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:06,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:06,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:06,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:06,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:06,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:06,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:06,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:06,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:06,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:06,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:06,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:06,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:06,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:06,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:06,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:06,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:06,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:06,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:06,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:06,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:06,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:06,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:06,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:06,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:06,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:23:06,240 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:06,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:06,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:06,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:06,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:06,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:06,243 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:06,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:06,244 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:06,244 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:06,245 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:06,246 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:06,246 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:06,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:06,247 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:06,247 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:06,247 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:06,247 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:06,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:06,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:06,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:06,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:23:06,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:06,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:23:06,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:23:06,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:06,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:23:06,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:06,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:06,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:06,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:06,254 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:06,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:06,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:23:06,254 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:06,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:06,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:23:06,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:06,255 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_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8954b1975c9ef274050a4ed05b880cddaf4747278343623028f38a4ef8e6ca73 [2022-10-17 17:23:06,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:06,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:06,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:06,639 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:06,640 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:06,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2022-10-17 17:23:06,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/data/49c43d735/cdab412b20e7450fac50c126b6319584/FLAGf155bd9ce [2022-10-17 17:23:07,435 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:07,436 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2022-10-17 17:23:07,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/data/49c43d735/cdab412b20e7450fac50c126b6319584/FLAGf155bd9ce [2022-10-17 17:23:07,561 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/data/49c43d735/cdab412b20e7450fac50c126b6319584 [2022-10-17 17:23:07,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:07,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:07,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:07,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:07,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:07,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:07" (1/1) ... [2022-10-17 17:23:07,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a6693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:07, skipping insertion in model container [2022-10-17 17:23:07,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:07" (1/1) ... [2022-10-17 17:23:07,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:07,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:08,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2022-10-17 17:23:08,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:08,679 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:08,909 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2022-10-17 17:23:08,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:08,954 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:08,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08 WrapperNode [2022-10-17 17:23:08,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:08,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:08,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:08,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:08,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:08,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,055 INFO L138 Inliner]: procedures = 99, calls = 305, calls flagged for inlining = 40, calls inlined = 37, statements flattened = 902 [2022-10-17 17:23:09,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:09,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:09,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:09,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:09,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,148 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:09,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:09,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:09,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:09,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (1/1) ... [2022-10-17 17:23:09,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:09,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:09,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:09,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:09,277 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2022-10-17 17:23:09,277 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2022-10-17 17:23:09,277 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:23:09,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:23:09,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:23:09,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-10-17 17:23:09,278 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-10-17 17:23:09,278 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_trg [2022-10-17 17:23:09,278 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_trg [2022-10-17 17:23:09,278 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2022-10-17 17:23:09,278 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2022-10-17 17:23:09,279 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_trg [2022-10-17 17:23:09,279 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_trg [2022-10-17 17:23:09,279 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-10-17 17:23:09,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-10-17 17:23:09,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:23:09,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:23:09,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:23:09,279 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_write [2022-10-17 17:23:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_write [2022-10-17 17:23:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable [2022-10-17 17:23:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable [2022-10-17 17:23:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_tren [2022-10-17 17:23:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_tren [2022-10-17 17:23:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-10-17 17:23:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-10-17 17:23:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:23:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:23:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:23:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-10-17 17:23:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-10-17 17:23:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_refresh [2022-10-17 17:23:09,282 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_refresh [2022-10-17 17:23:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_tren [2022-10-17 17:23:09,282 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_tren [2022-10-17 17:23:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:23:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:23:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:23:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable [2022-10-17 17:23:09,283 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable [2022-10-17 17:23:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:23:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_wden [2022-10-17 17:23:09,283 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_wden [2022-10-17 17:23:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:23:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-10-17 17:23:09,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-10-17 17:23:09,284 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2022-10-17 17:23:09,284 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2022-10-17 17:23:09,289 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-10-17 17:23:09,290 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-10-17 17:23:09,290 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-10-17 17:23:09,291 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-10-17 17:23:09,291 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-10-17 17:23:09,291 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-10-17 17:23:09,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:09,292 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2022-10-17 17:23:09,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2022-10-17 17:23:09,292 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_swc_bank3 [2022-10-17 17:23:09,292 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_swc_bank3 [2022-10-17 17:23:09,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:09,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:09,293 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_programm_wdto [2022-10-17 17:23:09,293 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_programm_wdto [2022-10-17 17:23:09,673 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:09,676 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:09,872 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:23:12,946 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:13,170 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:13,170 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:23:13,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:13 BoogieIcfgContainer [2022-10-17 17:23:13,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:13,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:13,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:13,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:13,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:07" (1/3) ... [2022-10-17 17:23:13,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165bd43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:13, skipping insertion in model container [2022-10-17 17:23:13,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:08" (2/3) ... [2022-10-17 17:23:13,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165bd43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:13, skipping insertion in model container [2022-10-17 17:23:13,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:13" (3/3) ... [2022-10-17 17:23:13,187 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2022-10-17 17:23:13,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:13,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:13,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:13,314 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;@57df5bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:13,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:23:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 284 states, 159 states have (on average 1.3522012578616351) internal successors, (215), 169 states have internal predecessors, (215), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-10-17 17:23:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-10-17 17:23:13,350 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:13,351 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:13,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:13,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash 547758539, now seen corresponding path program 1 times [2022-10-17 17:23:13,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:13,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790294775] [2022-10-17 17:23:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-17 17:23:14,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790294775] [2022-10-17 17:23:14,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790294775] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996760798] [2022-10-17 17:23:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:14,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,118 INFO L87 Difference]: Start difference. First operand has 284 states, 159 states have (on average 1.3522012578616351) internal successors, (215), 169 states have internal predecessors, (215), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:23:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:14,438 INFO L93 Difference]: Finished difference Result 795 states and 1145 transitions. [2022-10-17 17:23:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:14,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 99 [2022-10-17 17:23:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:14,465 INFO L225 Difference]: With dead ends: 795 [2022-10-17 17:23:14,466 INFO L226 Difference]: Without dead ends: 511 [2022-10-17 17:23:14,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,482 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 363 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:14,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 803 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-10-17 17:23:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-10-17 17:23:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 291 states have (on average 1.3230240549828178) internal successors, (385), 299 states have internal predecessors, (385), 172 states have call successors, (172), 48 states have call predecessors, (172), 47 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2022-10-17 17:23:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 728 transitions. [2022-10-17 17:23:14,647 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 728 transitions. Word has length 99 [2022-10-17 17:23:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:14,648 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 728 transitions. [2022-10-17 17:23:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:23:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 728 transitions. [2022-10-17 17:23:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-10-17 17:23:14,664 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:14,664 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-10-17 17:23:14,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:14,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1115996543, now seen corresponding path program 1 times [2022-10-17 17:23:14,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423774442] [2022-10-17 17:23:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-10-17 17:23:15,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:15,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423774442] [2022-10-17 17:23:15,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423774442] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:15,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:15,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720573106] [2022-10-17 17:23:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:15,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:15,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:15,126 INFO L87 Difference]: Start difference. First operand 511 states and 728 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-10-17 17:23:17,297 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 [] [2022-10-17 17:23:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:17,439 INFO L93 Difference]: Finished difference Result 1181 states and 1646 transitions. [2022-10-17 17:23:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 194 [2022-10-17 17:23:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:17,458 INFO L225 Difference]: With dead ends: 1181 [2022-10-17 17:23:17,458 INFO L226 Difference]: Without dead ends: 694 [2022-10-17 17:23:17,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:17,463 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 155 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:17,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 696 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-10-17 17:23:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-10-17 17:23:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 688. [2022-10-17 17:23:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 399 states have (on average 1.3082706766917294) internal successors, (522), 410 states have internal predecessors, (522), 212 states have call successors, (212), 77 states have call predecessors, (212), 76 states have return successors, (211), 210 states have call predecessors, (211), 211 states have call successors, (211) [2022-10-17 17:23:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 945 transitions. [2022-10-17 17:23:17,574 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 945 transitions. Word has length 194 [2022-10-17 17:23:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:17,577 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 945 transitions. [2022-10-17 17:23:17,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-10-17 17:23:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 945 transitions. [2022-10-17 17:23:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-10-17 17:23:17,595 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:17,596 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:17,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:17,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1133535450, now seen corresponding path program 1 times [2022-10-17 17:23:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:17,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335782381] [2022-10-17 17:23:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-10-17 17:23:18,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:18,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335782381] [2022-10-17 17:23:18,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335782381] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:18,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:18,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:23:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315678293] [2022-10-17 17:23:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:18,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:18,257 INFO L87 Difference]: Start difference. First operand 688 states and 945 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-10-17 17:23:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:18,879 INFO L93 Difference]: Finished difference Result 1367 states and 1873 transitions. [2022-10-17 17:23:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:23:18,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 243 [2022-10-17 17:23:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:18,894 INFO L225 Difference]: With dead ends: 1367 [2022-10-17 17:23:18,894 INFO L226 Difference]: Without dead ends: 685 [2022-10-17 17:23:18,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:23:18,901 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 17 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:18,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1409 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:23:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-10-17 17:23:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 663. [2022-10-17 17:23:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 383 states have (on average 1.3054830287206267) internal successors, (500), 397 states have internal predecessors, (500), 207 states have call successors, (207), 73 states have call predecessors, (207), 72 states have return successors, (206), 202 states have call predecessors, (206), 206 states have call successors, (206) [2022-10-17 17:23:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 913 transitions. [2022-10-17 17:23:18,979 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 913 transitions. Word has length 243 [2022-10-17 17:23:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:18,981 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 913 transitions. [2022-10-17 17:23:18,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-10-17 17:23:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 913 transitions. [2022-10-17 17:23:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-10-17 17:23:18,992 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:18,993 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:23:18,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1633239589, now seen corresponding path program 1 times [2022-10-17 17:23:18,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:18,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757774085] [2022-10-17 17:23:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:18,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-10-17 17:23:19,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:19,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757774085] [2022-10-17 17:23:19,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757774085] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:19,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:19,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:23:19,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977435922] [2022-10-17 17:23:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:19,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:23:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:23:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:19,928 INFO L87 Difference]: Start difference. First operand 663 states and 913 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2022-10-17 17:23:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:20,462 INFO L93 Difference]: Finished difference Result 1322 states and 1805 transitions. [2022-10-17 17:23:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:20,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) Word has length 354 [2022-10-17 17:23:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:20,471 INFO L225 Difference]: With dead ends: 1322 [2022-10-17 17:23:20,471 INFO L226 Difference]: Without dead ends: 631 [2022-10-17 17:23:20,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:20,477 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 344 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:20,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 949 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:23:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-10-17 17:23:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 626. [2022-10-17 17:23:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 361 states have (on average 1.2880886426592797) internal successors, (465), 372 states have internal predecessors, (465), 191 states have call successors, (191), 74 states have call predecessors, (191), 73 states have return successors, (190), 189 states have call predecessors, (190), 190 states have call successors, (190) [2022-10-17 17:23:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 846 transitions. [2022-10-17 17:23:20,532 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 846 transitions. Word has length 354 [2022-10-17 17:23:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:20,535 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 846 transitions. [2022-10-17 17:23:20,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2022-10-17 17:23:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 846 transitions. [2022-10-17 17:23:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-10-17 17:23:20,545 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:20,545 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:20,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:23:20,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1812168406, now seen corresponding path program 1 times [2022-10-17 17:23:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033203613] [2022-10-17 17:23:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:20,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked. [2022-10-17 17:23:22,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033203613] [2022-10-17 17:23:22,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033203613] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793631892] [2022-10-17 17:23:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:22,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:22,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:22,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:23:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:22,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 17:23:22,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-10-17 17:23:23,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:23:23,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793631892] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:23,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:23:23,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-10-17 17:23:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575037451] [2022-10-17 17:23:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:23,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:23:23,791 INFO L87 Difference]: Start difference. First operand 626 states and 846 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2022-10-17 17:23:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:25,231 INFO L93 Difference]: Finished difference Result 1583 states and 2201 transitions. [2022-10-17 17:23:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:23:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) Word has length 358 [2022-10-17 17:23:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:25,245 INFO L225 Difference]: With dead ends: 1583 [2022-10-17 17:23:25,245 INFO L226 Difference]: Without dead ends: 1402 [2022-10-17 17:23:25,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:23:25,248 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 763 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:25,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 1474 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 17:23:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-10-17 17:23:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1198. [2022-10-17 17:23:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 704 states have (on average 1.3267045454545454) internal successors, (934), 731 states have internal predecessors, (934), 363 states have call successors, (363), 131 states have call predecessors, (363), 130 states have return successors, (362), 356 states have call predecessors, (362), 362 states have call successors, (362) [2022-10-17 17:23:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1659 transitions. [2022-10-17 17:23:25,385 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1659 transitions. Word has length 358 [2022-10-17 17:23:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:25,386 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1659 transitions. [2022-10-17 17:23:25,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2022-10-17 17:23:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1659 transitions. [2022-10-17 17:23:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-10-17 17:23:25,400 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:25,401 INFO L195 NwaCegarLoop]: trace histogram [26, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:25,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:25,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:25,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash 947758461, now seen corresponding path program 1 times [2022-10-17 17:23:25,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:25,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503624151] [2022-10-17 17:23:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:25,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2022-10-17 17:23:26,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:26,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503624151] [2022-10-17 17:23:26,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503624151] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:26,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:26,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:26,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524969953] [2022-10-17 17:23:26,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:26,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:26,131 INFO L87 Difference]: Start difference. First operand 1198 states and 1659 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) [2022-10-17 17:23:28,399 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 [] [2022-10-17 17:23:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:28,620 INFO L93 Difference]: Finished difference Result 2775 states and 3847 transitions. [2022-10-17 17:23:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) Word has length 418 [2022-10-17 17:23:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:28,635 INFO L225 Difference]: With dead ends: 2775 [2022-10-17 17:23:28,636 INFO L226 Difference]: Without dead ends: 1776 [2022-10-17 17:23:28,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:28,645 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 208 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:28,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 723 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-10-17 17:23:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-10-17 17:23:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1770. [2022-10-17 17:23:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1045 states have (on average 1.309090909090909) internal successors, (1368), 1083 states have internal predecessors, (1368), 519 states have call successors, (519), 206 states have call predecessors, (519), 205 states have return successors, (518), 511 states have call predecessors, (518), 518 states have call successors, (518) [2022-10-17 17:23:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2405 transitions. [2022-10-17 17:23:28,801 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2405 transitions. Word has length 418 [2022-10-17 17:23:28,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:28,803 INFO L495 AbstractCegarLoop]: Abstraction has 1770 states and 2405 transitions. [2022-10-17 17:23:28,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) [2022-10-17 17:23:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2405 transitions. [2022-10-17 17:23:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-10-17 17:23:28,821 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:28,822 INFO L195 NwaCegarLoop]: trace histogram [26, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:23:28,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -364286449, now seen corresponding path program 2 times [2022-10-17 17:23:28,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391283556] [2022-10-17 17:23:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1208 trivial. 0 not checked. [2022-10-17 17:23:29,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:29,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391283556] [2022-10-17 17:23:29,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391283556] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:29,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:29,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712641418] [2022-10-17 17:23:29,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:29,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:29,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:29,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:29,373 INFO L87 Difference]: Start difference. First operand 1770 states and 2405 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) [2022-10-17 17:23:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:29,753 INFO L93 Difference]: Finished difference Result 4660 states and 6375 transitions. [2022-10-17 17:23:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) Word has length 418 [2022-10-17 17:23:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:29,782 INFO L225 Difference]: With dead ends: 4660 [2022-10-17 17:23:29,782 INFO L226 Difference]: Without dead ends: 3333 [2022-10-17 17:23:29,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:29,790 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 297 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:29,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 650 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2022-10-17 17:23:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3189. [2022-10-17 17:23:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 1894 states have (on average 1.3199577613516367) internal successors, (2500), 1965 states have internal predecessors, (2500), 934 states have call successors, (934), 361 states have call predecessors, (934), 360 states have return successors, (953), 918 states have call predecessors, (953), 933 states have call successors, (953) [2022-10-17 17:23:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4387 transitions. [2022-10-17 17:23:30,126 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4387 transitions. Word has length 418 [2022-10-17 17:23:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:30,127 INFO L495 AbstractCegarLoop]: Abstraction has 3189 states and 4387 transitions. [2022-10-17 17:23:30,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) [2022-10-17 17:23:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4387 transitions. [2022-10-17 17:23:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-10-17 17:23:30,141 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:30,141 INFO L195 NwaCegarLoop]: trace histogram [26, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:30,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:23:30,142 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1474996297, now seen corresponding path program 1 times [2022-10-17 17:23:30,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:30,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040903792] [2022-10-17 17:23:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1213 trivial. 0 not checked. [2022-10-17 17:23:30,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040903792] [2022-10-17 17:23:30,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040903792] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:30,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:30,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:30,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940429072] [2022-10-17 17:23:30,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:30,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:30,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:30,459 INFO L87 Difference]: Start difference. First operand 3189 states and 4387 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2022-10-17 17:23:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:30,852 INFO L93 Difference]: Finished difference Result 6219 states and 8594 transitions. [2022-10-17 17:23:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) Word has length 445 [2022-10-17 17:23:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:30,881 INFO L225 Difference]: With dead ends: 6219 [2022-10-17 17:23:30,881 INFO L226 Difference]: Without dead ends: 3229 [2022-10-17 17:23:30,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:30,893 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 3 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:30,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 701 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-10-17 17:23:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3229. [2022-10-17 17:23:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 1914 states have (on average 1.3113897596656217) internal successors, (2510), 1995 states have internal predecessors, (2510), 944 states have call successors, (944), 361 states have call predecessors, (944), 370 states have return successors, (973), 928 states have call predecessors, (973), 943 states have call successors, (973) [2022-10-17 17:23:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 4427 transitions. [2022-10-17 17:23:31,137 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 4427 transitions. Word has length 445 [2022-10-17 17:23:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:31,138 INFO L495 AbstractCegarLoop]: Abstraction has 3229 states and 4427 transitions. [2022-10-17 17:23:31,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2022-10-17 17:23:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 4427 transitions. [2022-10-17 17:23:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-10-17 17:23:31,150 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:31,150 INFO L195 NwaCegarLoop]: trace histogram [29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 17:23:31,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:23:31,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1669254790, now seen corresponding path program 1 times [2022-10-17 17:23:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:31,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944075679] [2022-10-17 17:23:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:31,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2022-10-17 17:23:32,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944075679] [2022-10-17 17:23:32,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944075679] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:32,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355511273] [2022-10-17 17:23:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:32,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:32,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:32,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:32,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:23:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2812 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 17:23:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2022-10-17 17:23:33,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:23:33,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355511273] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:33,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:23:33,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-10-17 17:23:33,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041129360] [2022-10-17 17:23:33,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:33,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:23:33,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:23:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:23:33,643 INFO L87 Difference]: Start difference. First operand 3229 states and 4427 transitions. Second operand has 4 states, 3 states have (on average 35.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2022-10-17 17:23:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:34,400 INFO L93 Difference]: Finished difference Result 6442 states and 8839 transitions. [2022-10-17 17:23:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:23:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 35.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) Word has length 450 [2022-10-17 17:23:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:34,429 INFO L225 Difference]: With dead ends: 6442 [2022-10-17 17:23:34,429 INFO L226 Difference]: Without dead ends: 3230 [2022-10-17 17:23:34,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:23:34,445 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:34,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1015 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:23:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2022-10-17 17:23:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3230. [2022-10-17 17:23:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 1915 states have (on average 1.3112271540469973) internal successors, (2511), 1996 states have internal predecessors, (2511), 944 states have call successors, (944), 361 states have call predecessors, (944), 370 states have return successors, (973), 928 states have call predecessors, (973), 943 states have call successors, (973) [2022-10-17 17:23:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 4428 transitions. [2022-10-17 17:23:34,815 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 4428 transitions. Word has length 450 [2022-10-17 17:23:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:34,816 INFO L495 AbstractCegarLoop]: Abstraction has 3230 states and 4428 transitions. [2022-10-17 17:23:34,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 35.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2022-10-17 17:23:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 4428 transitions. [2022-10-17 17:23:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-10-17 17:23:34,830 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:34,831 INFO L195 NwaCegarLoop]: trace histogram [29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 17:23:34,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:35,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309067ae-58ea-46f5-9a63-13c61f30fc80/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:35,046 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash 790940010, now seen corresponding path program 1 times [2022-10-17 17:23:35,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:35,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358433601] [2022-10-17 17:23:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat