./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P --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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:36:55,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:36:55,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:36:55,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:36:55,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:36:55,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:36:55,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:36:55,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:36:55,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:36:55,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:36:55,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:36:55,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:36:55,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:36:55,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:36:55,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:36:55,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:36:55,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:36:55,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:36:55,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:36:55,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:36:55,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:36:55,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:36:55,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:36:55,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:36:55,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:36:55,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:36:55,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:36:55,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:36:55,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:36:55,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:36:55,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:36:55,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:36:55,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:36:55,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:36:55,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:36:55,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:36:55,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:36:55,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:36:55,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:36:55,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:36:55,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:36:55,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:36:55,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:36:55,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:36:55,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:36:55,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:36:55,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:36:55,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:36:55,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:36:55,957 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:36:55,957 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:36:55,957 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:36:55,958 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:36:55,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:36:55,959 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:36:55,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:36:55,959 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:36:55,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:36:55,960 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:36:55,960 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:36:55,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:36:55,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:36:55,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:36:55,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:36:55,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:36:55,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:36:55,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:36:55,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:36:55,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:36:55,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:36:55,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:36:55,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:55,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:36:55,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:36:55,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:36:55,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:36:55,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:36:55,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:36:55,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:36:55,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:36:55,966 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-20 23:36:56,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:36:56,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:36:56,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:36:56,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:36:56,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:36:56,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-20 23:36:56,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/data/92f1e26e6/6bf50320797d4ea9b1e8834f6ac025f1/FLAGa400c980f [2021-11-20 23:36:57,182 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:36:57,183 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-20 23:36:57,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/data/92f1e26e6/6bf50320797d4ea9b1e8834f6ac025f1/FLAGa400c980f [2021-11-20 23:36:57,672 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/data/92f1e26e6/6bf50320797d4ea9b1e8834f6ac025f1 [2021-11-20 23:36:57,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:36:57,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:36:57,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:57,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:36:57,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:36:57,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:57" (1/1) ... [2021-11-20 23:36:57,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b20295e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:57, skipping insertion in model container [2021-11-20 23:36:57,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:57" (1/1) ... [2021-11-20 23:36:57,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:36:57,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:36:58,847 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-20 23:36:59,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:59,371 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:36:59,595 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-20 23:36:59,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:59,819 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:36:59,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59 WrapperNode [2021-11-20 23:36:59,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:59,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:59,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:36:59,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:36:59,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:36:59,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,043 INFO L137 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2364 [2021-11-20 23:37:00,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:37:00,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:37:00,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:37:00,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:37:00,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:37:00,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:37:00,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:37:00,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:37:00,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (1/1) ... [2021-11-20 23:37:00,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:37:00,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:00,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:37:00,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:37:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 23:37:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 23:37:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:37:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2021-11-20 23:37:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2021-11-20 23:37:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-20 23:37:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-20 23:37:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:37:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:37:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:37:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:37:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:37:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2021-11-20 23:37:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2021-11-20 23:37:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2021-11-20 23:37:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2021-11-20 23:37:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-11-20 23:37:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-11-20 23:37:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:37:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:37:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-20 23:37:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-20 23:37:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:37:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:37:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2021-11-20 23:37:00,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2021-11-20 23:37:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:37:00,327 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:37:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-20 23:37:00,327 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-20 23:37:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2021-11-20 23:37:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2021-11-20 23:37:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-20 23:37:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-20 23:37:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:37:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:37:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:37:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 23:37:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 23:37:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:37:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:37:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:37:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:37:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:37:00,330 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:37:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2021-11-20 23:37:00,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2021-11-20 23:37:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:37:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2021-11-20 23:37:00,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2021-11-20 23:37:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:37:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:37:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 23:37:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 23:37:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:37:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:37:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:37:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-20 23:37:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-20 23:37:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2021-11-20 23:37:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2021-11-20 23:37:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-20 23:37:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-20 23:37:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:37:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-20 23:37:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-20 23:37:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-11-20 23:37:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-11-20 23:37:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:37:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:37:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-20 23:37:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-20 23:37:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 23:37:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 23:37:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2021-11-20 23:37:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2021-11-20 23:37:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:37:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-20 23:37:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-20 23:37:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:37:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-20 23:37:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-20 23:37:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-20 23:37:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-20 23:37:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:37:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:37:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2021-11-20 23:37:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2021-11-20 23:37:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-20 23:37:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-20 23:37:00,857 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:37:00,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:37:01,236 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:37:04,737 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:37:05,557 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:37:05,557 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:37:05,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:05 BoogieIcfgContainer [2021-11-20 23:37:05,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:37:05,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:37:05,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:37:05,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:37:05,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:57" (1/3) ... [2021-11-20 23:37:05,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592a8020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:05, skipping insertion in model container [2021-11-20 23:37:05,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:59" (2/3) ... [2021-11-20 23:37:05,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592a8020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:05, skipping insertion in model container [2021-11-20 23:37:05,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:05" (3/3) ... [2021-11-20 23:37:05,570 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-20 23:37:05,575 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:37:05,575 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:37:05,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:37:05,656 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:37:05,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:37:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-20 23:37:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 23:37:05,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:05,705 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:05,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1776235691, now seen corresponding path program 1 times [2021-11-20 23:37:05,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394872954] [2021-11-20 23:37:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:05,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 23:37:06,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:06,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394872954] [2021-11-20 23:37:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394872954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:06,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:06,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:37:06,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407702732] [2021-11-20 23:37:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:06,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:06,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:06,242 INFO L87 Difference]: Start difference. First operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 23:37:09,089 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:09,284 INFO L93 Difference]: Finished difference Result 1364 states and 2015 transitions. [2021-11-20 23:37:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 71 [2021-11-20 23:37:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:09,309 INFO L225 Difference]: With dead ends: 1364 [2021-11-20 23:37:09,309 INFO L226 Difference]: Without dead ends: 899 [2021-11-20 23:37:09,317 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:37:09,320 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 626 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:09,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 1248 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 23:37:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-11-20 23:37:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 898. [2021-11-20 23:37:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 617 states have (on average 1.4197730956239871) internal successors, (876), 633 states have internal predecessors, (876), 210 states have call successors, (210), 71 states have call predecessors, (210), 70 states have return successors, (209), 208 states have call predecessors, (209), 209 states have call successors, (209) [2021-11-20 23:37:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1295 transitions. [2021-11-20 23:37:09,513 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1295 transitions. Word has length 71 [2021-11-20 23:37:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:09,514 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1295 transitions. [2021-11-20 23:37:09,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 23:37:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1295 transitions. [2021-11-20 23:37:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 23:37:09,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:09,527 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:09,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:37:09,528 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash -626052893, now seen corresponding path program 1 times [2021-11-20 23:37:09,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:09,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65094813] [2021-11-20 23:37:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:09,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 23:37:09,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65094813] [2021-11-20 23:37:09,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65094813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:09,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:09,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:37:09,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105730232] [2021-11-20 23:37:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:09,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:37:09,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:37:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:37:09,718 INFO L87 Difference]: Start difference. First operand 898 states and 1295 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 23:37:12,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:12,872 INFO L93 Difference]: Finished difference Result 1773 states and 2585 transitions. [2021-11-20 23:37:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:37:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 74 [2021-11-20 23:37:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:12,894 INFO L225 Difference]: With dead ends: 1773 [2021-11-20 23:37:12,894 INFO L226 Difference]: Without dead ends: 1768 [2021-11-20 23:37:12,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:12,898 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 652 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:12,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1894 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 23:37:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-11-20 23:37:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1759. [2021-11-20 23:37:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1210 states have (on average 1.4231404958677687) internal successors, (1722), 1242 states have internal predecessors, (1722), 408 states have call successors, (408), 141 states have call predecessors, (408), 140 states have return successors, (437), 404 states have call predecessors, (437), 407 states have call successors, (437) [2021-11-20 23:37:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2567 transitions. [2021-11-20 23:37:13,061 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2567 transitions. Word has length 74 [2021-11-20 23:37:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:13,064 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 2567 transitions. [2021-11-20 23:37:13,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 23:37:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2567 transitions. [2021-11-20 23:37:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 23:37:13,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:13,076 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 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] [2021-11-20 23:37:13,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:37:13,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash -167910529, now seen corresponding path program 1 times [2021-11-20 23:37:13,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:13,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558305967] [2021-11-20 23:37:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:13,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-20 23:37:13,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558305967] [2021-11-20 23:37:13,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558305967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:13,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:13,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:37:13,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838263996] [2021-11-20 23:37:13,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:13,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:13,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:13,285 INFO L87 Difference]: Start difference. First operand 1759 states and 2567 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:37:16,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:16,318 INFO L93 Difference]: Finished difference Result 4344 states and 6311 transitions. [2021-11-20 23:37:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-20 23:37:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:16,341 INFO L225 Difference]: With dead ends: 4344 [2021-11-20 23:37:16,341 INFO L226 Difference]: Without dead ends: 2606 [2021-11-20 23:37:16,347 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:37:16,349 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 339 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:16,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 1122 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 23:37:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-11-20 23:37:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2599. [2021-11-20 23:37:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 1794 states have (on average 1.4169453734671127) internal successors, (2542), 1836 states have internal predecessors, (2542), 592 states have call successors, (592), 213 states have call predecessors, (592), 212 states have return successors, (631), 586 states have call predecessors, (631), 591 states have call successors, (631) [2021-11-20 23:37:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3765 transitions. [2021-11-20 23:37:16,507 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3765 transitions. Word has length 114 [2021-11-20 23:37:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:16,507 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 3765 transitions. [2021-11-20 23:37:16,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:37:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3765 transitions. [2021-11-20 23:37:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 23:37:16,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:16,527 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:16,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:37:16,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1732334894, now seen corresponding path program 1 times [2021-11-20 23:37:16,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:16,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022910298] [2021-11-20 23:37:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:16,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-11-20 23:37:16,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:16,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022910298] [2021-11-20 23:37:16,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022910298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:16,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:16,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:37:16,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241212299] [2021-11-20 23:37:16,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:16,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:16,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:16,690 INFO L87 Difference]: Start difference. First operand 2599 states and 3765 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 23:37:19,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:19,805 INFO L93 Difference]: Finished difference Result 6435 states and 9288 transitions. [2021-11-20 23:37:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 146 [2021-11-20 23:37:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:19,835 INFO L225 Difference]: With dead ends: 6435 [2021-11-20 23:37:19,835 INFO L226 Difference]: Without dead ends: 3857 [2021-11-20 23:37:19,845 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:37:19,847 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 448 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:19,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1390 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 23:37:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2021-11-20 23:37:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3851. [2021-11-20 23:37:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 2695 states have (on average 1.4241187384044527) internal successors, (3838), 2761 states have internal predecessors, (3838), 821 states have call successors, (821), 335 states have call predecessors, (821), 334 states have return successors, (882), 811 states have call predecessors, (882), 820 states have call successors, (882) [2021-11-20 23:37:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5541 transitions. [2021-11-20 23:37:20,121 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5541 transitions. Word has length 146 [2021-11-20 23:37:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:20,122 INFO L470 AbstractCegarLoop]: Abstraction has 3851 states and 5541 transitions. [2021-11-20 23:37:20,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 23:37:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5541 transitions. [2021-11-20 23:37:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:37:20,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:20,133 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 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] [2021-11-20 23:37:20,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:37:20,133 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:20,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash 13898737, now seen corresponding path program 1 times [2021-11-20 23:37:20,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:20,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248553868] [2021-11-20 23:37:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:20,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-20 23:37:20,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:20,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248553868] [2021-11-20 23:37:20,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248553868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:20,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:20,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:37:20,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220980424] [2021-11-20 23:37:20,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:20,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:20,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:20,266 INFO L87 Difference]: Start difference. First operand 3851 states and 5541 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-20 23:37:23,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:23,626 INFO L93 Difference]: Finished difference Result 9392 states and 13441 transitions. [2021-11-20 23:37:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:23,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 141 [2021-11-20 23:37:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:23,697 INFO L225 Difference]: With dead ends: 9392 [2021-11-20 23:37:23,698 INFO L226 Difference]: Without dead ends: 5570 [2021-11-20 23:37:23,712 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:37:23,713 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 447 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:23,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1161 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 23:37:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-11-20 23:37:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 5463. [2021-11-20 23:37:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 3849 states have (on average 1.408677578591842) internal successors, (5422), 3934 states have internal predecessors, (5422), 1103 states have call successors, (1103), 511 states have call predecessors, (1103), 510 states have return successors, (1192), 1098 states have call predecessors, (1192), 1102 states have call successors, (1192) [2021-11-20 23:37:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7717 transitions. [2021-11-20 23:37:24,047 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7717 transitions. Word has length 141 [2021-11-20 23:37:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:24,049 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 7717 transitions. [2021-11-20 23:37:24,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-20 23:37:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7717 transitions. [2021-11-20 23:37:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 23:37:24,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:24,062 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:24,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:37:24,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 820773215, now seen corresponding path program 1 times [2021-11-20 23:37:24,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:24,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111834191] [2021-11-20 23:37:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:24,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-20 23:37:24,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111834191] [2021-11-20 23:37:24,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111834191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:24,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:24,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:37:24,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612243071] [2021-11-20 23:37:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:24,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:37:24,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:37:24,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:37:24,303 INFO L87 Difference]: Start difference. First operand 5463 states and 7717 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:37:28,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:28,260 INFO L93 Difference]: Finished difference Result 8208 states and 11643 transitions. [2021-11-20 23:37:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:37:28,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 135 [2021-11-20 23:37:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:28,330 INFO L225 Difference]: With dead ends: 8208 [2021-11-20 23:37:28,331 INFO L226 Difference]: Without dead ends: 8203 [2021-11-20 23:37:28,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:28,338 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 625 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:28,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 1882 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 23:37:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2021-11-20 23:37:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8169. [2021-11-20 23:37:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 5751 states have (on average 1.4082768214223613) internal successors, (8099), 5879 states have internal predecessors, (8099), 1652 states have call successors, (1652), 766 states have call predecessors, (1652), 765 states have return successors, (1831), 1645 states have call predecessors, (1831), 1651 states have call successors, (1831) [2021-11-20 23:37:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 11582 transitions. [2021-11-20 23:37:28,819 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 11582 transitions. Word has length 135 [2021-11-20 23:37:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:28,821 INFO L470 AbstractCegarLoop]: Abstraction has 8169 states and 11582 transitions. [2021-11-20 23:37:28,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:37:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 11582 transitions. [2021-11-20 23:37:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 23:37:28,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:28,834 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 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] [2021-11-20 23:37:28,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:37:28,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1003380476, now seen corresponding path program 1 times [2021-11-20 23:37:28,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:28,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052249598] [2021-11-20 23:37:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:28,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-20 23:37:28,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052249598] [2021-11-20 23:37:28,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052249598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:28,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:28,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:37:28,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095418089] [2021-11-20 23:37:28,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:28,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:28,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:28,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:28,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:28,939 INFO L87 Difference]: Start difference. First operand 8169 states and 11582 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 23:37:31,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:32,013 INFO L93 Difference]: Finished difference Result 10964 states and 15756 transitions. [2021-11-20 23:37:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 145 [2021-11-20 23:37:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:32,102 INFO L225 Difference]: With dead ends: 10964 [2021-11-20 23:37:32,102 INFO L226 Difference]: Without dead ends: 8219 [2021-11-20 23:37:32,118 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:37:32,119 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 4 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:32,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1126 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 23:37:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2021-11-20 23:37:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 8219. [2021-11-20 23:37:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 5791 states have (on average 1.4054567432222413) internal successors, (8139), 5929 states have internal predecessors, (8139), 1652 states have call successors, (1652), 766 states have call predecessors, (1652), 775 states have return successors, (1841), 1645 states have call predecessors, (1841), 1651 states have call successors, (1841) [2021-11-20 23:37:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 11632 transitions. [2021-11-20 23:37:32,573 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 11632 transitions. Word has length 145 [2021-11-20 23:37:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:32,574 INFO L470 AbstractCegarLoop]: Abstraction has 8219 states and 11632 transitions. [2021-11-20 23:37:32,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 23:37:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 11632 transitions. [2021-11-20 23:37:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 23:37:32,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:32,586 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:32,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:37:32,587 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1671533302, now seen corresponding path program 1 times [2021-11-20 23:37:32,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:32,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407103651] [2021-11-20 23:37:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:32,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-20 23:37:32,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407103651] [2021-11-20 23:37:32,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407103651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412321519] [2021-11-20 23:37:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:32,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:32,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:32,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce784b98-9df4-4843-ab1d-a298a5a1e190/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:37:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:37:33,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-20 23:37:33,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-20 23:37:35,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412321519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1967276752] [2021-11-20 23:37:35,438 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2021-11-20 23:37:35,438 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:35,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:35,449 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:35,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:35,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 197 [2021-11-20 23:37:36,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2021-11-20 23:37:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:39,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-20 23:37:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:41,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-20 23:39:42,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:39:42,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-20 23:39:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-20 23:39:44,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:39:44,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 23:39:44,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:39:44,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 23:39:44,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:39:44,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 23:39:44,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:39:44,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 23:39:45,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-20 23:39:45,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-20 23:39:45,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-20 23:39:45,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-20 23:39:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:42:50,849 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 88 for LOIs [2021-11-20 23:42:51,748 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 83 for LOIs [2021-11-20 23:42:52,039 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_asynctty_hangup with input of size 99 for LOIs [2021-11-20 23:42:54,696 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_asynctty_close with input of size 99 for LOIs [2021-11-20 23:42:56,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 23:42:56,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:42:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-20 23:42:57,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-20 23:42:57,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-11-20 23:42:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:43:00,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 248 [2021-11-20 23:43:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 225 [2021-11-20 23:43:00,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 208