./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-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW --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 c454dc64a3cc485840c6830ce9e1c132fc674b92d2da550d28087d832958d75f --- 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-4e7fbc6 [2022-11-23 15:23:37,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:23:37,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:23:37,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:23:37,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:23:37,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:23:37,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:23:37,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:23:37,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:23:37,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:23:37,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:23:37,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:23:37,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:23:37,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:23:37,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:23:37,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:23:37,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:23:37,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:23:37,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:23:37,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:23:37,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:23:37,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:23:37,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:23:37,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:23:37,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:23:37,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:23:37,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:23:37,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:23:37,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:23:37,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:23:37,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:23:37,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:23:37,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:23:37,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:23:37,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:23:37,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:23:37,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:23:37,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:23:37,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:23:37,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:23:37,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:23:37,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:23:37,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:23:37,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:23:37,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:23:37,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:23:37,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:23:37,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:23:37,866 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:23:37,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:23:37,867 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:23:37,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:23:37,867 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:23:37,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:23:37,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:23:37,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:23:37,868 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:23:37,868 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:23:37,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:23:37,868 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:23:37,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:23:37,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:23:37,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:23:37,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:23:37,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:23:37,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:23:37,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:23:37,870 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:23:37,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:23:37,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:23:37,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:23:37,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:23:37,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:23:37,871 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:23:37,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:23:37,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:23:37,872 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:23:37,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:23:37,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:23:37,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:23:37,873 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_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c454dc64a3cc485840c6830ce9e1c132fc674b92d2da550d28087d832958d75f [2022-11-23 15:23:38,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:23:38,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:23:38,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:23:38,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:23:38,199 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:23:38,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2022-11-23 15:23:41,236 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:23:41,887 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:23:41,887 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2022-11-23 15:23:41,935 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/data/c6d1a8f33/da0b8ccc4e9a4cc38b5fac56b7cfe665/FLAGc66ae7f43 [2022-11-23 15:23:41,959 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/data/c6d1a8f33/da0b8ccc4e9a4cc38b5fac56b7cfe665 [2022-11-23 15:23:41,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:23:41,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:23:41,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:23:41,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:23:41,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:23:41,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:23:41" (1/1) ... [2022-11-23 15:23:41,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2ad1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:41, skipping insertion in model container [2022-11-23 15:23:41,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:23:41" (1/1) ... [2022-11-23 15:23:41,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:23:42,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:23:44,114 WARN L237 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_29adbad1-14ac-42ff-8cf9-45932f528ffd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i[301264,301277] [2022-11-23 15:23:44,155 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-23 15:23:44,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:23:44,260 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:23:44,683 WARN L237 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_29adbad1-14ac-42ff-8cf9-45932f528ffd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i[301264,301277] [2022-11-23 15:23:44,688 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-23 15:23:44,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:23:44,831 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:23:44,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44 WrapperNode [2022-11-23 15:23:44,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:23:44,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:23:44,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:23:44,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:23:44,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:44,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,092 INFO L138 Inliner]: procedures = 221, calls = 2343, calls flagged for inlining = 115, calls inlined = 111, statements flattened = 4812 [2022-11-23 15:23:45,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:23:45,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:23:45,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:23:45,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:23:45,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:23:45,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:23:45,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:23:45,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:23:45,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (1/1) ... [2022-11-23 15:23:45,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:23:45,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:23:45,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:23:45,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:23:45,508 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2022-11-23 15:23:45,508 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2022-11-23 15:23:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:23:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:23:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:23:45,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:23:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 15:23:45,509 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 15:23:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure irda_setup_dma [2022-11-23 15:23:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_setup_dma [2022-11-23 15:23:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 15:23:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 15:23:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-23 15:23:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-23 15:23:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-23 15:23:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-23 15:23:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_receive_complete [2022-11-23 15:23:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_receive_complete [2022-11-23 15:23:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:23:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:23:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-23 15:23:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-23 15:23:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 15:23:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 15:23:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 15:23:45,514 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 15:23:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:23:45,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:23:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 15:23:45,515 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 15:23:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2022-11-23 15:23:45,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2022-11-23 15:23:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure switch_bank [2022-11-23 15:23:45,516 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_bank [2022-11-23 15:23:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure dma_zalloc_coherent [2022-11-23 15:23:45,516 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_zalloc_coherent [2022-11-23 15:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-23 15:23:45,517 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-23 15:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 15:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-23 15:23:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-23 15:23:45,518 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_remove_4 [2022-11-23 15:23:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_remove_4 [2022-11-23 15:23:45,518 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 15:23:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 15:23:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_receive [2022-11-23 15:23:45,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_receive [2022-11-23 15:23:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:23:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:23:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-23 15:23:45,521 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-23 15:23:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_ioctl [2022-11-23 15:23:45,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_ioctl [2022-11-23 15:23:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure SetCOMInterrupts [2022-11-23 15:23:45,521 INFO L138 BoogieDeclarations]: Found implementation of procedure SetCOMInterrupts [2022-11-23 15:23:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 15:23:45,522 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 15:23:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-23 15:23:45,522 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-23 15:23:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 15:23:45,522 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 15:23:45,523 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_change_dongle_speed [2022-11-23 15:23:45,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_change_dongle_speed [2022-11-23 15:23:45,523 INFO L130 BoogieDeclarations]: Found specification of procedure SIR2FIR [2022-11-23 15:23:45,523 INFO L138 BoogieDeclarations]: Found implementation of procedure SIR2FIR [2022-11-23 15:23:45,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:23:45,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:23:45,524 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_close [2022-11-23 15:23:45,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_close [2022-11-23 15:23:45,524 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2022-11-23 15:23:45,524 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2022-11-23 15:23:45,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:23:45,525 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 15:23:45,525 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 15:23:45,526 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_xmit [2022-11-23 15:23:45,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_xmit [2022-11-23 15:23:45,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:23:45,527 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:23:45,527 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2022-11-23 15:23:45,527 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2022-11-23 15:23:45,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-23 15:23:45,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-23 15:23:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure irda_get_next_speed [2022-11-23 15:23:45,528 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_get_next_speed [2022-11-23 15:23:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_open [2022-11-23 15:23:45,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_open [2022-11-23 15:23:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-23 15:23:45,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-23 15:23:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:23:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2022-11-23 15:23:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2022-11-23 15:23:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2022-11-23 15:23:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2022-11-23 15:23:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:23:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:23:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 15:23:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 15:23:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:23:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 15:23:45,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 15:23:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:23:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-23 15:23:45,532 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-23 15:23:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:23:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2022-11-23 15:23:45,533 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2022-11-23 15:23:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 15:23:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-23 15:23:45,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-23 15:23:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure FIR2SIR [2022-11-23 15:23:45,539 INFO L138 BoogieDeclarations]: Found implementation of procedure FIR2SIR [2022-11-23 15:23:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_drvdata [2022-11-23 15:23:45,539 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_drvdata [2022-11-23 15:23:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_change_speed [2022-11-23 15:23:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_change_speed [2022-11-23 15:23:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 15:23:45,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 15:23:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-23 15:23:45,548 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-23 15:23:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2022-11-23 15:23:45,549 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2022-11-23 15:23:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:23:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_resume [2022-11-23 15:23:45,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_resume [2022-11-23 15:23:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:23:45,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:23:46,268 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:23:46,272 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:23:47,697 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:23:53,389 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:23:54,992 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:23:54,992 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-23 15:23:54,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:23:54 BoogieIcfgContainer [2022-11-23 15:23:54,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:23:54,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:23:54,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:23:55,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:23:55,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:23:41" (1/3) ... [2022-11-23 15:23:55,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728c531e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:23:55, skipping insertion in model container [2022-11-23 15:23:55,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:44" (2/3) ... [2022-11-23 15:23:55,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728c531e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:23:55, skipping insertion in model container [2022-11-23 15:23:55,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:23:54" (3/3) ... [2022-11-23 15:23:55,006 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2022-11-23 15:23:55,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:23:55,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:23:55,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:23:55,106 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;@573a7c2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:23:55,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:23:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 1064 states, 597 states have (on average 1.3249581239530988) internal successors, (791), 625 states have internal predecessors, (791), 411 states have call successors, (411), 55 states have call predecessors, (411), 54 states have return successors, (404), 395 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-23 15:23:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-23 15:23:55,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:23:55,150 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:23:55,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:23:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:23:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1180241382, now seen corresponding path program 1 times [2022-11-23 15:23:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:23:55,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874020057] [2022-11-23 15:23:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:55,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:23:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:23:56,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:23:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874020057] [2022-11-23 15:23:56,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874020057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:23:56,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:23:56,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:23:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094721130] [2022-11-23 15:23:56,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:23:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:23:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:23:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:23:56,667 INFO L87 Difference]: Start difference. First operand has 1064 states, 597 states have (on average 1.3249581239530988) internal successors, (791), 625 states have internal predecessors, (791), 411 states have call successors, (411), 55 states have call predecessors, (411), 54 states have return successors, (404), 395 states have call predecessors, (404), 404 states have call successors, (404) Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:04,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:06,719 INFO L93 Difference]: Finished difference Result 3094 states and 4698 transitions. [2022-11-23 15:24:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:24:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 177 [2022-11-23 15:24:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:06,767 INFO L225 Difference]: With dead ends: 3094 [2022-11-23 15:24:06,768 INFO L226 Difference]: Without dead ends: 1981 [2022-11-23 15:24:06,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:24:06,793 INFO L413 NwaCegarLoop]: 1957 mSDtfsCounter, 1488 mSDsluCounter, 5284 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 7241 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:06,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 7241 Invalid, 961 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 957 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2022-11-23 15:24:06,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2022-11-23 15:24:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1967. [2022-11-23 15:24:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1107 states have (on average 1.3170731707317074) internal successors, (1458), 1150 states have internal predecessors, (1458), 757 states have call successors, (757), 103 states have call predecessors, (757), 102 states have return successors, (760), 733 states have call predecessors, (760), 756 states have call successors, (760) [2022-11-23 15:24:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 2975 transitions. [2022-11-23 15:24:07,145 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 2975 transitions. Word has length 177 [2022-11-23 15:24:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:07,147 INFO L495 AbstractCegarLoop]: Abstraction has 1967 states and 2975 transitions. [2022-11-23 15:24:07,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 2975 transitions. [2022-11-23 15:24:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-23 15:24:07,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:07,173 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:24:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:24:07,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:07,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1575324727, now seen corresponding path program 1 times [2022-11-23 15:24:07,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:07,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042949836] [2022-11-23 15:24:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:07,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:24:07,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:07,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042949836] [2022-11-23 15:24:07,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042949836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:07,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:07,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:24:07,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538049906] [2022-11-23 15:24:07,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:07,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:24:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:24:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:24:07,959 INFO L87 Difference]: Start difference. First operand 1967 states and 2975 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:09,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:15,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:17,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:18,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:20,134 INFO L93 Difference]: Finished difference Result 4506 states and 6799 transitions. [2022-11-23 15:24:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:24:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 179 [2022-11-23 15:24:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:20,156 INFO L225 Difference]: With dead ends: 4506 [2022-11-23 15:24:20,157 INFO L226 Difference]: Without dead ends: 2984 [2022-11-23 15:24:20,166 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 [2022-11-23 15:24:20,167 INFO L413 NwaCegarLoop]: 1744 mSDtfsCounter, 1515 mSDsluCounter, 4812 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:20,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 6556 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 816 Invalid, 1 Unknown, 0 Unchecked, 11.9s Time] [2022-11-23 15:24:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2022-11-23 15:24:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2966. [2022-11-23 15:24:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 1672 states have (on average 1.3157894736842106) internal successors, (2200), 1733 states have internal predecessors, (2200), 1138 states have call successors, (1138), 156 states have call predecessors, (1138), 155 states have return successors, (1145), 1106 states have call predecessors, (1145), 1137 states have call successors, (1145) [2022-11-23 15:24:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 4483 transitions. [2022-11-23 15:24:20,378 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 4483 transitions. Word has length 179 [2022-11-23 15:24:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:20,379 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 4483 transitions. [2022-11-23 15:24:20,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 4483 transitions. [2022-11-23 15:24:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-23 15:24:20,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:20,398 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:24:20,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:24:20,399 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash 62545015, now seen corresponding path program 1 times [2022-11-23 15:24:20,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:20,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440598013] [2022-11-23 15:24:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:24:21,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440598013] [2022-11-23 15:24:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440598013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:21,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:21,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:24:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249631826] [2022-11-23 15:24:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:21,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:24:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:24:21,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:24:21,135 INFO L87 Difference]: Start difference. First operand 2966 states and 4483 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:22,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:27,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:30,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:30,844 INFO L93 Difference]: Finished difference Result 6453 states and 9740 transitions. [2022-11-23 15:24:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:24:30,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 178 [2022-11-23 15:24:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:30,873 INFO L225 Difference]: With dead ends: 6453 [2022-11-23 15:24:30,873 INFO L226 Difference]: Without dead ends: 3931 [2022-11-23 15:24:30,888 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 [2022-11-23 15:24:30,889 INFO L413 NwaCegarLoop]: 1721 mSDtfsCounter, 1430 mSDsluCounter, 4766 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 6487 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:30,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 6487 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 813 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2022-11-23 15:24:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-23 15:24:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3909. [2022-11-23 15:24:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 2207 states have (on average 1.31717263253285) internal successors, (2907), 2287 states have internal predecessors, (2907), 1496 states have call successors, (1496), 206 states have call predecessors, (1496), 205 states have return successors, (1507), 1455 states have call predecessors, (1507), 1495 states have call successors, (1507) [2022-11-23 15:24:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 5910 transitions. [2022-11-23 15:24:31,205 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 5910 transitions. Word has length 178 [2022-11-23 15:24:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:31,206 INFO L495 AbstractCegarLoop]: Abstraction has 3909 states and 5910 transitions. [2022-11-23 15:24:31,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 5910 transitions. [2022-11-23 15:24:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-23 15:24:31,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:31,219 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:24:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:24:31,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2136267386, now seen corresponding path program 1 times [2022-11-23 15:24:31,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:31,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697717085] [2022-11-23 15:24:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:24:31,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697717085] [2022-11-23 15:24:31,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697717085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:31,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:31,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:24:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978589425] [2022-11-23 15:24:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:31,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:24:31,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:24:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:24:31,888 INFO L87 Difference]: Start difference. First operand 3909 states and 5910 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:37,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:39,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:40,660 INFO L93 Difference]: Finished difference Result 7122 states and 10743 transitions. [2022-11-23 15:24:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:24:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 180 [2022-11-23 15:24:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:40,686 INFO L225 Difference]: With dead ends: 7122 [2022-11-23 15:24:40,686 INFO L226 Difference]: Without dead ends: 3656 [2022-11-23 15:24:40,703 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 [2022-11-23 15:24:40,704 INFO L413 NwaCegarLoop]: 1725 mSDtfsCounter, 1427 mSDsluCounter, 4774 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 6499 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:40,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 6499 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 816 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-11-23 15:24:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2022-11-23 15:24:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3637. [2022-11-23 15:24:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 2037 states have (on average 1.314187530682376) internal successors, (2677), 2112 states have internal predecessors, (2677), 1400 states have call successors, (1400), 200 states have call predecessors, (1400), 199 states have return successors, (1411), 1360 states have call predecessors, (1411), 1399 states have call successors, (1411) [2022-11-23 15:24:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 5488 transitions. [2022-11-23 15:24:40,984 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 5488 transitions. Word has length 180 [2022-11-23 15:24:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:40,985 INFO L495 AbstractCegarLoop]: Abstraction has 3637 states and 5488 transitions. [2022-11-23 15:24:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:24:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 5488 transitions. [2022-11-23 15:24:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-23 15:24:40,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:40,998 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:24:40,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:24:40,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1394962634, now seen corresponding path program 1 times [2022-11-23 15:24:41,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:41,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960752644] [2022-11-23 15:24:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-11-23 15:24:42,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:42,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960752644] [2022-11-23 15:24:42,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960752644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:42,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540606130] [2022-11-23 15:24:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:42,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:42,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:42,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:24:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 4605 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:24:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:24:43,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:24:43,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540606130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:43,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:24:43,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 15:24:43,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781793784] [2022-11-23 15:24:43,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:43,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:24:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:24:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:24:43,665 INFO L87 Difference]: Start difference. First operand 3637 states and 5488 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:24:44,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:51,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:53,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:57,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:24:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:57,820 INFO L93 Difference]: Finished difference Result 9315 states and 14048 transitions. [2022-11-23 15:24:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:24:57,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 190 [2022-11-23 15:24:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:57,861 INFO L225 Difference]: With dead ends: 9315 [2022-11-23 15:24:57,862 INFO L226 Difference]: Without dead ends: 6353 [2022-11-23 15:24:57,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:24:57,881 INFO L413 NwaCegarLoop]: 2057 mSDtfsCounter, 1548 mSDsluCounter, 9561 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 11618 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:57,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 11618 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1557 Invalid, 1 Unknown, 0 Unchecked, 13.7s Time] [2022-11-23 15:24:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2022-11-23 15:24:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6308. [2022-11-23 15:24:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6308 states, 3533 states have (on average 1.3147466742145486) internal successors, (4645), 3670 states have internal predecessors, (4645), 2424 states have call successors, (2424), 348 states have call predecessors, (2424), 350 states have return successors, (2455), 2351 states have call predecessors, (2455), 2423 states have call successors, (2455) [2022-11-23 15:24:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6308 states to 6308 states and 9524 transitions. [2022-11-23 15:24:58,432 INFO L78 Accepts]: Start accepts. Automaton has 6308 states and 9524 transitions. Word has length 190 [2022-11-23 15:24:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:58,433 INFO L495 AbstractCegarLoop]: Abstraction has 6308 states and 9524 transitions. [2022-11-23 15:24:58,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:24:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6308 states and 9524 transitions. [2022-11-23 15:24:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-23 15:24:58,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:58,452 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:24:58,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:58,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:58,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash 566440138, now seen corresponding path program 1 times [2022-11-23 15:24:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:58,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392565447] [2022-11-23 15:24:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:24:59,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:59,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392565447] [2022-11-23 15:24:59,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392565447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:59,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945301706] [2022-11-23 15:24:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:59,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:59,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:59,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:59,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:25:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:25:01,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:25:01,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:01,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945301706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:01,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:01,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-23 15:25:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413371060] [2022-11-23 15:25:01,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:01,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:25:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:25:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:25:01,367 INFO L87 Difference]: Start difference. First operand 6308 states and 9524 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:25:09,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:11,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:15,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:17,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:20,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:25,707 INFO L93 Difference]: Finished difference Result 15678 states and 23651 transitions. [2022-11-23 15:25:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:25:25,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 191 [2022-11-23 15:25:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:25,764 INFO L225 Difference]: With dead ends: 15678 [2022-11-23 15:25:25,764 INFO L226 Difference]: Without dead ends: 10045 [2022-11-23 15:25:25,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:25:25,792 INFO L413 NwaCegarLoop]: 2232 mSDtfsCounter, 1548 mSDsluCounter, 10249 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 12481 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:25,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 12481 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1817 Invalid, 3 Unknown, 0 Unchecked, 23.9s Time] [2022-11-23 15:25:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10045 states. [2022-11-23 15:25:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10045 to 8990. [2022-11-23 15:25:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 5036 states have (on average 1.3145353455123114) internal successors, (6620), 5240 states have internal predecessors, (6620), 3448 states have call successors, (3448), 496 states have call predecessors, (3448), 505 states have return successors, (3504), 3341 states have call predecessors, (3504), 3447 states have call successors, (3504) [2022-11-23 15:25:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 13572 transitions. [2022-11-23 15:25:26,545 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 13572 transitions. Word has length 191 [2022-11-23 15:25:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:26,547 INFO L495 AbstractCegarLoop]: Abstraction has 8990 states and 13572 transitions. [2022-11-23 15:25:26,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:25:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 13572 transitions. [2022-11-23 15:25:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-23 15:25:26,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:26,574 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:25:26,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:26,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:26,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1344736061, now seen corresponding path program 1 times [2022-11-23 15:25:26,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:26,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959352254] [2022-11-23 15:25:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:26,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:25:27,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:27,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959352254] [2022-11-23 15:25:27,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959352254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:27,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146983994] [2022-11-23 15:25:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:27,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:27,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:27,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:27,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:25:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:29,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 4609 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:25:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:25:29,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:29,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146983994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:29,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:29,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-23 15:25:29,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232493155] [2022-11-23 15:25:29,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:29,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:25:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:25:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:25:29,274 INFO L87 Difference]: Start difference. First operand 8990 states and 13572 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:25:30,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:38,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:41,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:43,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:25:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:47,429 INFO L93 Difference]: Finished difference Result 19915 states and 30057 transitions. [2022-11-23 15:25:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:25:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 192 [2022-11-23 15:25:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:47,491 INFO L225 Difference]: With dead ends: 19915 [2022-11-23 15:25:47,491 INFO L226 Difference]: Without dead ends: 11600 [2022-11-23 15:25:47,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:25:47,518 INFO L413 NwaCegarLoop]: 2166 mSDtfsCounter, 1463 mSDsluCounter, 9985 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 12151 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:47,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 12151 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1733 Invalid, 3 Unknown, 0 Unchecked, 17.6s Time] [2022-11-23 15:25:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2022-11-23 15:25:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 11504. [2022-11-23 15:25:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11504 states, 6436 states have (on average 1.3169670602858918) internal successors, (8476), 6702 states have internal predecessors, (8476), 4423 states have call successors, (4423), 633 states have call predecessors, (4423), 644 states have return successors, (4496), 4282 states have call predecessors, (4496), 4422 states have call successors, (4496) [2022-11-23 15:25:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11504 states to 11504 states and 17395 transitions. [2022-11-23 15:25:48,532 INFO L78 Accepts]: Start accepts. Automaton has 11504 states and 17395 transitions. Word has length 192 [2022-11-23 15:25:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:48,533 INFO L495 AbstractCegarLoop]: Abstraction has 11504 states and 17395 transitions. [2022-11-23 15:25:48,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:25:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 11504 states and 17395 transitions. [2022-11-23 15:25:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-23 15:25:48,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:48,570 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:25:48,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:25:48,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:25:48,788 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash -193541967, now seen corresponding path program 1 times [2022-11-23 15:25:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661174011] [2022-11-23 15:25:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:25:49,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661174011] [2022-11-23 15:25:49,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661174011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989514773] [2022-11-23 15:25:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:49,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:49,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:25:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 4611 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:25:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:25:51,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:51,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989514773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:51,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:51,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-23 15:25:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696295943] [2022-11-23 15:25:51,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:25:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:25:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:25:51,372 INFO L87 Difference]: Start difference. First operand 11504 states and 17395 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:26:00,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:26:03,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:26:04,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:26:08,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:26:11,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:26:12,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:26:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:13,762 INFO L93 Difference]: Finished difference Result 26067 states and 39387 transitions. [2022-11-23 15:26:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:26:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 193 [2022-11-23 15:26:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:13,839 INFO L225 Difference]: With dead ends: 26067 [2022-11-23 15:26:13,839 INFO L226 Difference]: Without dead ends: 15238 [2022-11-23 15:26:13,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:26:13,891 INFO L413 NwaCegarLoop]: 2234 mSDtfsCounter, 1548 mSDsluCounter, 10257 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 12491 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:13,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 12491 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1817 Invalid, 2 Unknown, 0 Unchecked, 21.7s Time] [2022-11-23 15:26:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15238 states. [2022-11-23 15:26:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15238 to 11506. [2022-11-23 15:26:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 6438 states have (on average 1.3168685927306616) internal successors, (8478), 6702 states have internal predecessors, (8478), 4423 states have call successors, (4423), 633 states have call predecessors, (4423), 644 states have return successors, (4496), 4284 states have call predecessors, (4496), 4422 states have call successors, (4496) [2022-11-23 15:26:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 17397 transitions. [2022-11-23 15:26:14,913 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 17397 transitions. Word has length 193 [2022-11-23 15:26:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:14,918 INFO L495 AbstractCegarLoop]: Abstraction has 11506 states and 17397 transitions. [2022-11-23 15:26:14,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:26:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 17397 transitions. [2022-11-23 15:26:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-23 15:26:14,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:14,956 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:14,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:15,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:15,177 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -249190796, now seen corresponding path program 1 times [2022-11-23 15:26:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:15,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333912920] [2022-11-23 15:26:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:15,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 15:26:15,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:15,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333912920] [2022-11-23 15:26:15,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333912920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:15,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:15,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:26:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472254531] [2022-11-23 15:26:15,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:15,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:26:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:26:15,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:26:15,622 INFO L87 Difference]: Start difference. First operand 11506 states and 17397 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:26:17,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:26:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:19,850 INFO L93 Difference]: Finished difference Result 21773 states and 32738 transitions. [2022-11-23 15:26:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:26:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 205 [2022-11-23 15:26:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:19,903 INFO L225 Difference]: With dead ends: 21773 [2022-11-23 15:26:19,904 INFO L226 Difference]: Without dead ends: 10286 [2022-11-23 15:26:19,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:26:19,946 INFO L413 NwaCegarLoop]: 1230 mSDtfsCounter, 1411 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:19,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 1230 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-23 15:26:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2022-11-23 15:26:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 10286. [2022-11-23 15:26:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10286 states, 5751 states have (on average 1.302208311597983) internal successors, (7489), 5963 states have internal predecessors, (7489), 3902 states have call successors, (3902), 621 states have call predecessors, (3902), 632 states have return successors, (3963), 3802 states have call predecessors, (3963), 3901 states have call successors, (3963) [2022-11-23 15:26:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 15354 transitions. [2022-11-23 15:26:20,971 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 15354 transitions. Word has length 205 [2022-11-23 15:26:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:20,972 INFO L495 AbstractCegarLoop]: Abstraction has 10286 states and 15354 transitions. [2022-11-23 15:26:20,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:26:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 15354 transitions. [2022-11-23 15:26:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-23 15:26:20,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:20,997 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:20,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:26:20,998 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:20,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1087153602, now seen corresponding path program 1 times [2022-11-23 15:26:20,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:20,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530191894] [2022-11-23 15:26:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:20,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 15:26:21,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530191894] [2022-11-23 15:26:21,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530191894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:21,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:21,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:26:21,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760238783] [2022-11-23 15:26:21,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:21,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:26:21,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:21,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:26:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:26:21,322 INFO L87 Difference]: Start difference. First operand 10286 states and 15354 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:26:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:26,702 INFO L93 Difference]: Finished difference Result 25869 states and 38521 transitions. [2022-11-23 15:26:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:26:26,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 206 [2022-11-23 15:26:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:26,784 INFO L225 Difference]: With dead ends: 25869 [2022-11-23 15:26:26,784 INFO L226 Difference]: Without dead ends: 15602 [2022-11-23 15:26:26,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:26:26,824 INFO L413 NwaCegarLoop]: 1542 mSDtfsCounter, 1220 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:26,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 2731 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 15:26:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2022-11-23 15:26:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 15527. [2022-11-23 15:26:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15527 states, 8698 states have (on average 1.2952402851230167) internal successors, (11266), 9016 states have internal predecessors, (11266), 5873 states have call successors, (5873), 934 states have call predecessors, (5873), 955 states have return successors, (5967), 5715 states have call predecessors, (5967), 5872 states have call successors, (5967) [2022-11-23 15:26:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15527 states to 15527 states and 23106 transitions. [2022-11-23 15:26:28,321 INFO L78 Accepts]: Start accepts. Automaton has 15527 states and 23106 transitions. Word has length 206 [2022-11-23 15:26:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:28,321 INFO L495 AbstractCegarLoop]: Abstraction has 15527 states and 23106 transitions. [2022-11-23 15:26:28,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:26:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 15527 states and 23106 transitions. [2022-11-23 15:26:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-23 15:26:28,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:28,335 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:26:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:26:28,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash 571066178, now seen corresponding path program 1 times [2022-11-23 15:26:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:28,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445100120] [2022-11-23 15:26:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:28,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 15:26:29,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:29,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445100120] [2022-11-23 15:26:29,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445100120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:29,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713769892] [2022-11-23 15:26:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:29,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:29,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:29,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:29,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29adbad1-14ac-42ff-8cf9-45932f528ffd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:26:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 4678 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:26:30,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-23 15:26:31,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-23 15:26:31,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713769892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465320562] [2022-11-23 15:26:31,713 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2022-11-23 15:26:31,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:31,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:31,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:31,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:41,268 INFO L217 Elim1Store]: Index analysis took 2539 ms