./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba --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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:26:46,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:26:46,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:26:46,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:26:46,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:26:46,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:26:46,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:26:46,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:26:46,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:26:46,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:26:46,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:26:46,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:26:46,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:26:46,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:26:46,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:26:46,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:26:46,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:26:46,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:26:46,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:26:46,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:26:46,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:26:47,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:26:47,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:26:47,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:26:47,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:26:47,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:26:47,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:26:47,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:26:47,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:26:47,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:26:47,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:26:47,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:26:47,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:26:47,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:26:47,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:26:47,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:26:47,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:26:47,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:26:47,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:26:47,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:26:47,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:26:47,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 02:26:47,052 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:26:47,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:26:47,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:26:47,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:26:47,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:26:47,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:26:47,055 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:26:47,055 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:26:47,056 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:26:47,056 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:26:47,056 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:26:47,057 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:26:47,057 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:26:47,057 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:26:47,057 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:26:47,058 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:26:47,058 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:26:47,058 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:26:47,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:26:47,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:26:47,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:26:47,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:26:47,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:26:47,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:26:47,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:26:47,060 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:26:47,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:26:47,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:26:47,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:26:47,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:26:47,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:26:47,062 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:26:47,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:26:47,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:26:47,063 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:26:47,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:26:47,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:26:47,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:26:47,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2022-11-22 02:26:47,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:26:47,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:26:47,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:26:47,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:26:47,411 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:26:47,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-22 02:26:50,629 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:26:51,272 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:26:51,273 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-22 02:26:51,315 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/data/72131094e/f26977d894714fbc8f7be9c2ec56c659/FLAG0d7ae5109 [2022-11-22 02:26:51,331 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/data/72131094e/f26977d894714fbc8f7be9c2ec56c659 [2022-11-22 02:26:51,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:26:51,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:26:51,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:26:51,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:26:51,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:26:51,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:26:51" (1/1) ... [2022-11-22 02:26:51,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331a4559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:51, skipping insertion in model container [2022-11-22 02:26:51,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:26:51" (1/1) ... [2022-11-22 02:26:51,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:26:51,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:26:52,583 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-11-22 02:26:53,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:26:53,138 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:26:53,287 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-11-22 02:26:53,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:26:53,641 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:26:53,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53 WrapperNode [2022-11-22 02:26:53,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:26:53,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:26:53,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:26:53,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:26:53,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:53,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:53,858 INFO L138 Inliner]: procedures = 175, calls = 797, calls flagged for inlining = 84, calls inlined = 84, statements flattened = 2193 [2022-11-22 02:26:53,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:26:53,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:26:53,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:26:53,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:26:53,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:53,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:53,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:53,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:53,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:54,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:54,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:54,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:54,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:26:54,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:26:54,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:26:54,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:26:54,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (1/1) ... [2022-11-22 02:26:54,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:26:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:54,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:26:54,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:26:54,126 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-22 02:26:54,126 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-22 02:26:54,126 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-22 02:26:54,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-22 02:26:54,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-22 02:26:54,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-22 02:26:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2022-11-22 02:26:54,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2022-11-22 02:26:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-22 02:26:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-22 02:26:54,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-22 02:26:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-22 02:26:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-22 02:26:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-22 02:26:54,128 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-22 02:26:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-22 02:26:54,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-22 02:26:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:26:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-22 02:26:54,129 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-22 02:26:54,130 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-22 02:26:54,130 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-22 02:26:54,130 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-22 02:26:54,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-22 02:26:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-22 02:26:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-22 02:26:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-22 02:26:54,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-22 02:26:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-22 02:26:54,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-22 02:26:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-22 02:26:54,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-22 02:26:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2022-11-22 02:26:54,133 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2022-11-22 02:26:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-22 02:26:54,134 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-22 02:26:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-22 02:26:54,134 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-22 02:26:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:26:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-22 02:26:54,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-22 02:26:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-22 02:26:54,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-22 02:26:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-22 02:26:54,135 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-22 02:26:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:26:54,136 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:26:54,136 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-22 02:26:54,136 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-22 02:26:54,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:26:54,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-22 02:26:54,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-22 02:26:54,138 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-22 02:26:54,138 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-22 02:26:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:26:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-22 02:26:54,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-22 02:26:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:26:54,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 02:26:54,140 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-22 02:26:54,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-22 02:26:54,140 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-22 02:26:54,140 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-22 02:26:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-22 02:26:54,182 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-22 02:26:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:26:54,183 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-22 02:26:54,183 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-22 02:26:54,183 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-22 02:26:54,183 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-22 02:26:54,183 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-22 02:26:54,183 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-22 02:26:54,183 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2022-11-22 02:26:54,183 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2022-11-22 02:26:54,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:26:54,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:26:54,184 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2022-11-22 02:26:54,184 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2022-11-22 02:26:54,184 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-22 02:26:54,184 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-22 02:26:54,184 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-22 02:26:54,184 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-22 02:26:54,185 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-22 02:26:54,185 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-22 02:26:54,185 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-22 02:26:54,185 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-22 02:26:54,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-22 02:26:54,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-22 02:26:54,185 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-22 02:26:54,185 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-22 02:26:54,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:26:54,186 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-22 02:26:54,186 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-22 02:26:54,186 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-22 02:26:54,186 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-22 02:26:54,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-22 02:26:54,186 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2022-11-22 02:26:54,186 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2022-11-22 02:26:54,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-22 02:26:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-22 02:26:54,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:26:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:26:54,187 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2022-11-22 02:26:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2022-11-22 02:26:54,850 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:26:54,853 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:26:55,077 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-22 02:26:56,028 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-22 02:27:00,418 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:27:01,297 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:27:01,297 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:27:01,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:01 BoogieIcfgContainer [2022-11-22 02:27:01,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:27:01,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:27:01,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:27:01,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:27:01,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:26:51" (1/3) ... [2022-11-22 02:27:01,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f2badf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:01, skipping insertion in model container [2022-11-22 02:27:01,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:53" (2/3) ... [2022-11-22 02:27:01,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f2badf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:01, skipping insertion in model container [2022-11-22 02:27:01,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:01" (3/3) ... [2022-11-22 02:27:01,323 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-22 02:27:01,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:27:01,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:27:01,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:27:01,446 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@547af190, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:27:01,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:27:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 292 states have (on average 1.3527397260273972) internal successors, (395), 311 states have internal predecessors, (395), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2022-11-22 02:27:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:27:01,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:01,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:01,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:01,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2139448133, now seen corresponding path program 1 times [2022-11-22 02:27:01,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:01,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230510548] [2022-11-22 02:27:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:27:02,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:02,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230510548] [2022-11-22 02:27:02,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230510548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:02,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:02,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:02,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578518476] [2022-11-22 02:27:02,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:02,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:02,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:02,216 INFO L87 Difference]: Start difference. First operand has 468 states, 292 states have (on average 1.3527397260273972) internal successors, (395), 311 states have internal predecessors, (395), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:05,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:06,136 INFO L93 Difference]: Finished difference Result 1370 states and 1911 transitions. [2022-11-22 02:27:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-22 02:27:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:06,170 INFO L225 Difference]: With dead ends: 1370 [2022-11-22 02:27:06,171 INFO L226 Difference]: Without dead ends: 887 [2022-11-22 02:27:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:06,182 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 605 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:06,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1210 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-22 02:27:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-22 02:27:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2022-11-22 02:27:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 562 states have (on average 1.3202846975088969) internal successors, (742), 580 states have internal predecessors, (742), 242 states have call successors, (242), 83 states have call predecessors, (242), 82 states have return successors, (238), 235 states have call predecessors, (238), 237 states have call successors, (238) [2022-11-22 02:27:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1222 transitions. [2022-11-22 02:27:06,310 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1222 transitions. Word has length 23 [2022-11-22 02:27:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:06,311 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1222 transitions. [2022-11-22 02:27:06,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1222 transitions. [2022-11-22 02:27:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 02:27:06,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:06,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:06,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:27:06,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1403421984, now seen corresponding path program 1 times [2022-11-22 02:27:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:06,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11571088] [2022-11-22 02:27:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:27:06,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11571088] [2022-11-22 02:27:06,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11571088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:06,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:06,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:06,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143711657] [2022-11-22 02:27:06,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:06,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:06,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:06,842 INFO L87 Difference]: Start difference. First operand 887 states and 1222 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:10,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:10,227 INFO L93 Difference]: Finished difference Result 1423 states and 1948 transitions. [2022-11-22 02:27:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:10,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-22 02:27:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:10,238 INFO L225 Difference]: With dead ends: 1423 [2022-11-22 02:27:10,238 INFO L226 Difference]: Without dead ends: 1420 [2022-11-22 02:27:10,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:10,242 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 361 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:10,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1123 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:27:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2022-11-22 02:27:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1408. [2022-11-22 02:27:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 901 states have (on average 1.3263041065482797) internal successors, (1195), 925 states have internal predecessors, (1195), 370 states have call successors, (370), 139 states have call predecessors, (370), 136 states have return successors, (366), 357 states have call predecessors, (366), 365 states have call successors, (366) [2022-11-22 02:27:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1931 transitions. [2022-11-22 02:27:10,415 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1931 transitions. Word has length 32 [2022-11-22 02:27:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:10,416 INFO L495 AbstractCegarLoop]: Abstraction has 1408 states and 1931 transitions. [2022-11-22 02:27:10,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1931 transitions. [2022-11-22 02:27:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 02:27:10,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:10,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:10,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:27:10,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 556072814, now seen corresponding path program 1 times [2022-11-22 02:27:10,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:10,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136183333] [2022-11-22 02:27:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:10,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:27:10,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136183333] [2022-11-22 02:27:10,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136183333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:10,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:10,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:10,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170129945] [2022-11-22 02:27:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:10,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:10,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:10,955 INFO L87 Difference]: Start difference. First operand 1408 states and 1931 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:13,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:14,077 INFO L93 Difference]: Finished difference Result 1558 states and 2111 transitions. [2022-11-22 02:27:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-22 02:27:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:14,089 INFO L225 Difference]: With dead ends: 1558 [2022-11-22 02:27:14,089 INFO L226 Difference]: Without dead ends: 1555 [2022-11-22 02:27:14,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:14,092 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 605 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:14,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 715 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-22 02:27:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2022-11-22 02:27:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2022-11-22 02:27:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 990 states have (on average 1.3212121212121213) internal successors, (1308), 1018 states have internal predecessors, (1308), 401 states have call successors, (401), 166 states have call predecessors, (401), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-11-22 02:27:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2108 transitions. [2022-11-22 02:27:14,258 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2108 transitions. Word has length 33 [2022-11-22 02:27:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:14,259 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2108 transitions. [2022-11-22 02:27:14,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2108 transitions. [2022-11-22 02:27:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:27:14,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:14,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:14,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:27:14,266 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash 58057187, now seen corresponding path program 1 times [2022-11-22 02:27:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:14,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28272537] [2022-11-22 02:27:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:27:14,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28272537] [2022-11-22 02:27:14,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28272537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:14,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:14,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560809045] [2022-11-22 02:27:14,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:14,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:14,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:14,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:14,485 INFO L87 Difference]: Start difference. First operand 1555 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:17,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:17,699 INFO L93 Difference]: Finished difference Result 1557 states and 2109 transitions. [2022-11-22 02:27:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-11-22 02:27:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:17,709 INFO L225 Difference]: With dead ends: 1557 [2022-11-22 02:27:17,709 INFO L226 Difference]: Without dead ends: 1554 [2022-11-22 02:27:17,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:17,712 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 602 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:17,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 713 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 02:27:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-22 02:27:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1554. [2022-11-22 02:27:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 990 states have (on average 1.3202020202020202) internal successors, (1307), 1017 states have internal predecessors, (1307), 400 states have call successors, (400), 166 states have call predecessors, (400), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-11-22 02:27:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2106 transitions. [2022-11-22 02:27:17,826 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2106 transitions. Word has length 34 [2022-11-22 02:27:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:17,826 INFO L495 AbstractCegarLoop]: Abstraction has 1554 states and 2106 transitions. [2022-11-22 02:27:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2106 transitions. [2022-11-22 02:27:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:27:17,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:17,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:17,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:27:17,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1799446801, now seen corresponding path program 1 times [2022-11-22 02:27:17,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:17,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348891917] [2022-11-22 02:27:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:27:17,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:17,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348891917] [2022-11-22 02:27:17,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348891917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:17,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:17,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702441828] [2022-11-22 02:27:17,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:17,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:18,000 INFO L87 Difference]: Start difference. First operand 1554 states and 2106 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:20,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:20,983 INFO L93 Difference]: Finished difference Result 1556 states and 2107 transitions. [2022-11-22 02:27:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:20,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-11-22 02:27:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:20,994 INFO L225 Difference]: With dead ends: 1556 [2022-11-22 02:27:20,994 INFO L226 Difference]: Without dead ends: 1553 [2022-11-22 02:27:20,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:20,997 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 599 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:20,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 711 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 02:27:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-11-22 02:27:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1553. [2022-11-22 02:27:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 990 states have (on average 1.3191919191919192) internal successors, (1306), 1016 states have internal predecessors, (1306), 399 states have call successors, (399), 166 states have call predecessors, (399), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-11-22 02:27:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2104 transitions. [2022-11-22 02:27:21,119 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2104 transitions. Word has length 35 [2022-11-22 02:27:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:21,120 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2104 transitions. [2022-11-22 02:27:21,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2104 transitions. [2022-11-22 02:27:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 02:27:21,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:21,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:27:21,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash -52045146, now seen corresponding path program 1 times [2022-11-22 02:27:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:21,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534546654] [2022-11-22 02:27:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:27:21,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:21,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534546654] [2022-11-22 02:27:21,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534546654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:21,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:21,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864337641] [2022-11-22 02:27:21,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:21,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:21,295 INFO L87 Difference]: Start difference. First operand 1553 states and 2104 transitions. 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:24,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:24,504 INFO L93 Difference]: Finished difference Result 1555 states and 2105 transitions. [2022-11-22 02:27:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:24,504 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-22 02:27:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:24,513 INFO L225 Difference]: With dead ends: 1555 [2022-11-22 02:27:24,513 INFO L226 Difference]: Without dead ends: 1546 [2022-11-22 02:27:24,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:24,516 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 596 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:24,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 710 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 02:27:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2022-11-22 02:27:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1546. [2022-11-22 02:27:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 984 states have (on average 1.3170731707317074) internal successors, (1296), 1009 states have internal predecessors, (1296), 398 states have call successors, (398), 166 states have call predecessors, (398), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-11-22 02:27:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2093 transitions. [2022-11-22 02:27:24,637 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2093 transitions. Word has length 36 [2022-11-22 02:27:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:24,638 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 2093 transitions. [2022-11-22 02:27:24,638 INFO L496 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:27:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2093 transitions. [2022-11-22 02:27:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 02:27:24,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:24,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-22 02:27:24,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:27:24,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1147701699, now seen corresponding path program 1 times [2022-11-22 02:27:24,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:24,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281628414] [2022-11-22 02:27:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:24,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:27:24,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281628414] [2022-11-22 02:27:24,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281628414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:24,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:24,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:24,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937855004] [2022-11-22 02:27:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:24,828 INFO L87 Difference]: Start difference. First operand 1546 states and 2093 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:27:28,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:28,355 INFO L93 Difference]: Finished difference Result 3650 states and 4918 transitions. [2022-11-22 02:27:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:28,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-11-22 02:27:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:28,368 INFO L225 Difference]: With dead ends: 3650 [2022-11-22 02:27:28,368 INFO L226 Difference]: Without dead ends: 2109 [2022-11-22 02:27:28,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:28,375 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 194 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:28,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1091 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:27:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2022-11-22 02:27:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2104. [2022-11-22 02:27:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1354 states have (on average 1.3183161004431314) internal successors, (1785), 1383 states have internal predecessors, (1785), 519 states have call successors, (519), 233 states have call predecessors, (519), 230 states have return successors, (520), 509 states have call predecessors, (520), 518 states have call successors, (520) [2022-11-22 02:27:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 2824 transitions. [2022-11-22 02:27:28,556 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 2824 transitions. Word has length 67 [2022-11-22 02:27:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:28,556 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 2824 transitions. [2022-11-22 02:27:28,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:27:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 2824 transitions. [2022-11-22 02:27:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 02:27:28,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:28,562 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2022-11-22 02:27:28,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:27:28,562 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1067073844, now seen corresponding path program 1 times [2022-11-22 02:27:28,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:28,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407444407] [2022-11-22 02:27:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:28,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:27:28,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407444407] [2022-11-22 02:27:28,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407444407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:28,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:28,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916770321] [2022-11-22 02:27:28,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:28,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:28,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:28,807 INFO L87 Difference]: Start difference. First operand 2104 states and 2824 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 02:27:32,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:32,471 INFO L93 Difference]: Finished difference Result 4794 states and 6438 transitions. [2022-11-22 02:27:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2022-11-22 02:27:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:32,487 INFO L225 Difference]: With dead ends: 4794 [2022-11-22 02:27:32,488 INFO L226 Difference]: Without dead ends: 2701 [2022-11-22 02:27:32,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:32,496 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 198 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:32,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 1183 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:27:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-11-22 02:27:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2696. [2022-11-22 02:27:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 1760 states have (on average 1.3232954545454545) internal successors, (2329), 1793 states have internal predecessors, (2329), 639 states have call successors, (639), 299 states have call predecessors, (639), 296 states have return successors, (640), 629 states have call predecessors, (640), 638 states have call successors, (640) [2022-11-22 02:27:32,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 3608 transitions. [2022-11-22 02:27:32,808 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 3608 transitions. Word has length 79 [2022-11-22 02:27:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:32,809 INFO L495 AbstractCegarLoop]: Abstraction has 2696 states and 3608 transitions. [2022-11-22 02:27:32,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 02:27:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 3608 transitions. [2022-11-22 02:27:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 02:27:32,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:32,815 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-22 02:27:32,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:27:32,815 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1345299885, now seen corresponding path program 1 times [2022-11-22 02:27:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:32,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728738318] [2022-11-22 02:27:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:32,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:27:33,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:33,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728738318] [2022-11-22 02:27:33,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728738318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:33,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990098164] [2022-11-22 02:27:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:33,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:33,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:27:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:27:34,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:27:34,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990098164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:34,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:27:34,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-22 02:27:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708140442] [2022-11-22 02:27:34,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:34,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:27:34,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:27:34,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:27:34,489 INFO L87 Difference]: Start difference. First operand 2696 states and 3608 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:27:38,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:39,400 INFO L93 Difference]: Finished difference Result 5357 states and 7400 transitions. [2022-11-22 02:27:39,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:27:39,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-11-22 02:27:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:39,428 INFO L225 Difference]: With dead ends: 5357 [2022-11-22 02:27:39,428 INFO L226 Difference]: Without dead ends: 3733 [2022-11-22 02:27:39,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:27:39,439 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 284 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:39,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1830 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 319 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-22 02:27:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2022-11-22 02:27:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 2704. [2022-11-22 02:27:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 1768 states have (on average 1.3218325791855203) internal successors, (2337), 1801 states have internal predecessors, (2337), 639 states have call successors, (639), 299 states have call predecessors, (639), 296 states have return successors, (640), 629 states have call predecessors, (640), 638 states have call successors, (640) [2022-11-22 02:27:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3616 transitions. [2022-11-22 02:27:39,770 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3616 transitions. Word has length 88 [2022-11-22 02:27:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:39,771 INFO L495 AbstractCegarLoop]: Abstraction has 2704 states and 3616 transitions. [2022-11-22 02:27:39,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:27:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3616 transitions. [2022-11-22 02:27:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 02:27:39,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:39,775 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-22 02:27:39,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:39,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash -110739469, now seen corresponding path program 1 times [2022-11-22 02:27:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:39,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043489290] [2022-11-22 02:27:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:27:40,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043489290] [2022-11-22 02:27:40,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043489290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:40,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187899836] [2022-11-22 02:27:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:40,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:40,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:40,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:40,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:27:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:41,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:27:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:27:41,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:27:42,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187899836] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:42,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:27:42,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 11 [2022-11-22 02:27:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457003001] [2022-11-22 02:27:42,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:42,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:27:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:42,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:27:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:27:42,144 INFO L87 Difference]: Start difference. First operand 2704 states and 3616 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:27:45,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:27:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:46,796 INFO L93 Difference]: Finished difference Result 6517 states and 8733 transitions. [2022-11-22 02:27:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:27:46,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2022-11-22 02:27:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:46,818 INFO L225 Difference]: With dead ends: 6517 [2022-11-22 02:27:46,818 INFO L226 Difference]: Without dead ends: 3824 [2022-11-22 02:27:46,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:27:46,827 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 1196 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 390 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 1305 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 440 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-22 02:27:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2022-11-22 02:27:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3572. [2022-11-22 02:27:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 2340 states have (on average 1.3235042735042735) internal successors, (3097), 2385 states have internal predecessors, (3097), 817 states have call successors, (817), 419 states have call predecessors, (817), 414 states have return successors, (820), 803 states have call predecessors, (820), 816 states have call successors, (820) [2022-11-22 02:27:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 4734 transitions. [2022-11-22 02:27:47,229 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 4734 transitions. Word has length 97 [2022-11-22 02:27:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:47,230 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 4734 transitions. [2022-11-22 02:27:47,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:27:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 4734 transitions. [2022-11-22 02:27:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-22 02:27:47,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:47,235 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-22 02:27:47,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:47,448 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1052655286, now seen corresponding path program 1 times [2022-11-22 02:27:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931660713] [2022-11-22 02:27:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:47,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:27:48,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:48,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931660713] [2022-11-22 02:27:48,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931660713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:48,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044751243] [2022-11-22 02:27:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:48,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:48,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:48,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:48,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:27:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:27:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:27:49,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:27:50,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044751243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:50,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232584817] [2022-11-22 02:27:50,467 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-22 02:27:50,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:50,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:50,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:50,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:52,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:52,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:52,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:52,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 62 [2022-11-22 02:27:52,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-22 02:27:52,779 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 02:27:53,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 85 [2022-11-22 02:27:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:54,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:54,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:54,073 INFO L217 Elim1Store]: Index analysis took 113 ms [2022-11-22 02:27:54,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 62 [2022-11-22 02:27:54,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 02:27:54,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-22 02:27:55,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 321 [2022-11-22 02:27:55,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:55,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-22 02:27:55,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-22 02:27:57,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 321 [2022-11-22 02:27:57,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-22 02:27:57,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:57,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-22 02:30:13,666 INFO L197 IcfgInterpreter]: Interpreting procedure can_led_event with input of size 126 for LOIs [2022-11-22 02:30:13,677 INFO L197 IcfgInterpreter]: Interpreting procedure close_candev with input of size 219 for LOIs [2022-11-22 02:30:13,734 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 224 for LOIs [2022-11-22 02:30:13,952 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_alloc_urb with input of size 222 for LOIs [2022-11-22 02:30:16,224 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undef_int with input of size 213 for LOIs [2022-11-22 02:30:16,282 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 122 for LOIs [2022-11-22 02:30:16,292 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 221 for LOIs [2022-11-22 02:30:16,499 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_priv with input of size 120 for LOIs [2022-11-22 02:30:16,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:30:26,538 WARN L233 SmtUtils]: Spent 9.01s on a formula simplification that was a NOOP. DAG size: 995 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:47,177 WARN L233 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 654 DAG size of output: 651 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:31:53,774 WARN L233 SmtUtils]: Spent 9.60s on a formula simplification. DAG size of input: 453 DAG size of output: 327 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:32:00,694 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 445 DAG size of output: 317 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:32:34,703 WARN L233 SmtUtils]: Spent 10.73s on a formula simplification. DAG size of input: 456 DAG size of output: 339 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:32:42,392 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 456 DAG size of output: 320 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:32:50,423 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 463 DAG size of output: 327 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:32:58,082 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 463 DAG size of output: 323 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:33:05,250 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 464 DAG size of output: 317 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:33:22,705 WARN L233 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 473 DAG size of output: 383 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:33:25,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75329#(and (<= 0 ~ldv_state_variable_2~0) (= ~__mod_usb_device_table~0.bInterfaceClass 0) (= ~__mod_usb_device_table~0.bcdDevice_hi 0) (= ~INTERF_STATE~0 0) (= |~#usb_8dev_table~0.offset| 0) (= ~LDV_IN_INTERRUPT~0 1) (<= ~usb_8dev_driver_group1~0.offset 0) (<= ~usb_8dev_netdev_ops_group1~0.offset 0) (= ~ldv_retval_1~0 0) (= ~__mod_usb_device_table~0.idVendor 0) (= ~usb_intfdata~0.base 0) (= ~completeFnBulk~0.base 0) (= ~completeFnBulkCounter~0 0) (<= 0 ~usb_8dev_driver_group1~0.offset) (= ~__mod_usb_device_table~0.bcdDevice_lo 0) (= ~__mod_usb_device_table~0.bDeviceProtocol 0) (= |~#usb_8dev_bittiming_const~0.base| 39) (= |~#usb_8dev_table~0.base| 37) (= ~__mod_usb_device_table~0.idProduct 0) (<= ~ldv_retval_3~0 0) (= ~__mod_usb_device_table~0.match_flags 0) (= ~__mod_usb_device_table~0.driver_info 0) (= ~ldv_state_variable_1~0 0) (= ~usb_dev~0.base 0) (= |~#usb_8dev_bittiming_const~0.offset| 0) (<= ~usb_8dev_driver_group1~0.base 0) (= ~ldv_state_variable_0~0 2) (= ~usb_dev~0.offset 0) (= ~dev_counter~0 0) (= ~__mod_usb_device_table~0.bDeviceClass 0) (<= 0 (+ ~ldv_retval_3~0 12)) (not (= (mod (+ ~usb_urb~0.base ~usb_urb~0.offset) 18446744073709551616) 0)) (= ~__mod_usb_device_table~0.bInterfaceSubClass 0) (= |~#usb_8dev_driver~0.offset| 0) (= ~ref_cnt~0 0) (= ~completeFnInt~0.base 0) (<= 0 ~usb_8dev_netdev_ops_group1~0.offset) (= ~__mod_usb_device_table~0.bInterfaceNumber 0) (= ~completeFnInt~0.offset 0) (= ~usb_intfdata~0.offset 0) (= |~#usb_8dev_netdev_ops~0.offset| 0) (= ~completeFnBulk~0.offset 0) (= ~__mod_usb_device_table~0.bDeviceSubClass 0) (= |#NULL.offset| 0) (<= ~usb_8dev_netdev_ops_group1~0.base 0) (= ~ldv_retval_0~0 0) (<= 0 ~usb_counter~0) (= 38 |~#usb_8dev_netdev_ops~0.base|) (= ~__mod_usb_device_table~0.bInterfaceProtocol 0) (= ~SERIAL_STATE~0 0) (= ~completeFnIntCounter~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~usb_8dev_netdev_ops_group1~0.base) (= 40 |~#usb_8dev_driver~0.base|) (= |#NULL.base| 0) (<= 0 ~usb_8dev_driver_group1~0.base))' at error location [2022-11-22 02:33:25,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:33:25,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:33:25,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-11-22 02:33:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328189879] [2022-11-22 02:33:25,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:33:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:33:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:33:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:33:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=5008, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 02:33:25,388 INFO L87 Difference]: Start difference. First operand 3572 states and 4734 transitions. Second operand has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-22 02:33:42,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:33:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:33:52,032 INFO L93 Difference]: Finished difference Result 25105 states and 33331 transitions. [2022-11-22 02:33:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 02:33:52,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 96 [2022-11-22 02:33:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:33:52,162 INFO L225 Difference]: With dead ends: 25105 [2022-11-22 02:33:52,162 INFO L226 Difference]: Without dead ends: 21536 [2022-11-22 02:33:52,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 221 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3734 ImplicationChecksByTransitivity, 191.1s TimeCoverageRelationStatistics Valid=929, Invalid=7627, Unknown=0, NotChecked=0, Total=8556 [2022-11-22 02:33:52,184 INFO L413 NwaCegarLoop]: 1710 mSDtfsCounter, 5974 mSDsluCounter, 6046 mSDsCounter, 0 mSdLazyCounter, 8474 mSolverCounterSat, 3309 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6010 SdHoareTripleChecker+Valid, 7756 SdHoareTripleChecker+Invalid, 11784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3309 IncrementalHoareTripleChecker+Valid, 8474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:33:52,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6010 Valid, 7756 Invalid, 11784 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3309 Valid, 8474 Invalid, 1 Unknown, 0 Unchecked, 22.0s Time] [2022-11-22 02:33:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21536 states. [2022-11-22 02:33:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21536 to 17752. [2022-11-22 02:33:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17752 states, 11856 states have (on average 1.3411774628879891) internal successors, (15901), 12091 states have internal predecessors, (15901), 3881 states have call successors, (3881), 2027 states have call predecessors, (3881), 2014 states have return successors, (3892), 3783 states have call predecessors, (3892), 3880 states have call successors, (3892) [2022-11-22 02:33:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17752 states to 17752 states and 23674 transitions. [2022-11-22 02:33:54,250 INFO L78 Accepts]: Start accepts. Automaton has 17752 states and 23674 transitions. Word has length 96 [2022-11-22 02:33:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:33:54,251 INFO L495 AbstractCegarLoop]: Abstraction has 17752 states and 23674 transitions. [2022-11-22 02:33:54,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-22 02:33:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 17752 states and 23674 transitions. [2022-11-22 02:33:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-22 02:33:54,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:33:54,270 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:33:54,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:33:54,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:33:54,479 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:33:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:33:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash 40049851, now seen corresponding path program 1 times [2022-11-22 02:33:54,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:33:54,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448583440] [2022-11-22 02:33:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:54,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:33:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-22 02:33:55,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:33:55,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448583440] [2022-11-22 02:33:55,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448583440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:55,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420195092] [2022-11-22 02:33:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:33:55,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:33:55,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:33:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:33:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:33:56,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:33:56,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420195092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:33:56,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:33:56,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-22 02:33:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320990222] [2022-11-22 02:33:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:33:56,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:33:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:33:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:33:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:33:56,145 INFO L87 Difference]: Start difference. First operand 17752 states and 23674 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:33:59,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:34:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:00,445 INFO L93 Difference]: Finished difference Result 25766 states and 34400 transitions. [2022-11-22 02:34:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:00,446 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), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 105 [2022-11-22 02:34:00,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:00,478 INFO L225 Difference]: With dead ends: 25766 [2022-11-22 02:34:00,478 INFO L226 Difference]: Without dead ends: 7629 [2022-11-22 02:34:00,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:34:00,522 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 536 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:00,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 942 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:34:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2022-11-22 02:34:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 7212. [2022-11-22 02:34:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 4799 states have (on average 1.3302771410710565) internal successors, (6384), 4900 states have internal predecessors, (6384), 1591 states have call successors, (1591), 828 states have call predecessors, (1591), 821 states have return successors, (1596), 1549 states have call predecessors, (1596), 1590 states have call successors, (1596) [2022-11-22 02:34:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 9571 transitions. [2022-11-22 02:34:01,261 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 9571 transitions. Word has length 105 [2022-11-22 02:34:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:01,261 INFO L495 AbstractCegarLoop]: Abstraction has 7212 states and 9571 transitions. [2022-11-22 02:34:01,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:34:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 9571 transitions. [2022-11-22 02:34:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-22 02:34:01,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:01,273 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:01,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:01,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:34:01,487 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -975667106, now seen corresponding path program 1 times [2022-11-22 02:34:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:01,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045088851] [2022-11-22 02:34:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-22 02:34:02,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045088851] [2022-11-22 02:34:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045088851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:02,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:02,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:34:02,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893081828] [2022-11-22 02:34:02,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:02,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:34:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:34:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:34:02,877 INFO L87 Difference]: Start difference. First operand 7212 states and 9571 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:34:10,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:34:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:12,853 INFO L93 Difference]: Finished difference Result 11202 states and 15046 transitions. [2022-11-22 02:34:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:34:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2022-11-22 02:34:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:12,902 INFO L225 Difference]: With dead ends: 11202 [2022-11-22 02:34:12,903 INFO L226 Difference]: Without dead ends: 10907 [2022-11-22 02:34:12,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:34:12,980 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 965 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 444 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:12,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 930 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2331 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-11-22 02:34:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10907 states. [2022-11-22 02:34:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10907 to 10657. [2022-11-22 02:34:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10657 states, 7050 states have (on average 1.3256737588652483) internal successors, (9346), 7223 states have internal predecessors, (9346), 2383 states have call successors, (2383), 1206 states have call predecessors, (2383), 1223 states have return successors, (2520), 2332 states have call predecessors, (2520), 2382 states have call successors, (2520) [2022-11-22 02:34:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10657 states to 10657 states and 14249 transitions. [2022-11-22 02:34:14,356 INFO L78 Accepts]: Start accepts. Automaton has 10657 states and 14249 transitions. Word has length 106 [2022-11-22 02:34:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 10657 states and 14249 transitions. [2022-11-22 02:34:14,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:34:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 10657 states and 14249 transitions. [2022-11-22 02:34:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-22 02:34:14,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:14,371 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:14,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:34:14,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1096872017, now seen corresponding path program 1 times [2022-11-22 02:34:14,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:14,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110023355] [2022-11-22 02:34:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:14,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:34:15,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:15,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110023355] [2022-11-22 02:34:15,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110023355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:15,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:15,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:34:15,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538470537] [2022-11-22 02:34:15,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:15,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:34:15,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:34:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:34:15,223 INFO L87 Difference]: Start difference. First operand 10657 states and 14249 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 02:34:21,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:34:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:23,771 INFO L93 Difference]: Finished difference Result 18816 states and 25786 transitions. [2022-11-22 02:34:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:34:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2022-11-22 02:34:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:23,842 INFO L225 Difference]: With dead ends: 18816 [2022-11-22 02:34:23,843 INFO L226 Difference]: Without dead ends: 18385 [2022-11-22 02:34:23,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:34:23,853 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 517 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:23,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 2667 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1239 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-22 02:34:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18385 states. [2022-11-22 02:34:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18385 to 13178. [2022-11-22 02:34:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13178 states, 8737 states have (on average 1.3263133798786768) internal successors, (11588), 8946 states have internal predecessors, (11588), 2929 states have call successors, (2929), 1494 states have call predecessors, (2929), 1511 states have return successors, (3096), 2857 states have call predecessors, (3096), 2928 states have call successors, (3096) [2022-11-22 02:34:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13178 states to 13178 states and 17613 transitions. [2022-11-22 02:34:25,585 INFO L78 Accepts]: Start accepts. Automaton has 13178 states and 17613 transitions. Word has length 110 [2022-11-22 02:34:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:25,585 INFO L495 AbstractCegarLoop]: Abstraction has 13178 states and 17613 transitions. [2022-11-22 02:34:25,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 02:34:25,586 INFO L276 IsEmpty]: Start isEmpty. Operand 13178 states and 17613 transitions. [2022-11-22 02:34:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 02:34:25,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:25,609 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:34:25,609 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1651578763, now seen corresponding path program 1 times [2022-11-22 02:34:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:25,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711866924] [2022-11-22 02:34:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-22 02:34:29,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:29,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711866924] [2022-11-22 02:34:29,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711866924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:29,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902553742] [2022-11-22 02:34:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:29,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:29,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:29,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:29,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:34:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-22 02:34:30,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-22 02:34:32,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-22 02:34:35,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902553742] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:35,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:34:35,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 14] total 32 [2022-11-22 02:34:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877585476] [2022-11-22 02:34:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:34:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:34:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:34:35,248 INFO L87 Difference]: Start difference. First operand 13178 states and 17613 transitions. Second operand has 9 states, 6 states have (on average 12.5) internal successors, (75), 7 states have internal predecessors, (75), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:34:43,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:34:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:47,185 INFO L93 Difference]: Finished difference Result 18699 states and 24995 transitions. [2022-11-22 02:34:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:34:47,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 12.5) internal successors, (75), 7 states have internal predecessors, (75), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 125 [2022-11-22 02:34:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:47,252 INFO L225 Difference]: With dead ends: 18699 [2022-11-22 02:34:47,253 INFO L226 Difference]: Without dead ends: 18408 [2022-11-22 02:34:47,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:34:47,262 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1484 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 664 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:47,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1543 Valid, 1393 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2203 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2022-11-22 02:34:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18408 states. [2022-11-22 02:34:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18408 to 13178. [2022-11-22 02:34:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13178 states, 8737 states have (on average 1.3263133798786768) internal successors, (11588), 8946 states have internal predecessors, (11588), 2929 states have call successors, (2929), 1494 states have call predecessors, (2929), 1511 states have return successors, (3096), 2857 states have call predecessors, (3096), 2928 states have call successors, (3096) [2022-11-22 02:34:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13178 states to 13178 states and 17613 transitions. [2022-11-22 02:34:50,043 INFO L78 Accepts]: Start accepts. Automaton has 13178 states and 17613 transitions. Word has length 125 [2022-11-22 02:34:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:50,043 INFO L495 AbstractCegarLoop]: Abstraction has 13178 states and 17613 transitions. [2022-11-22 02:34:50,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 12.5) internal successors, (75), 7 states have internal predecessors, (75), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:34:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 13178 states and 17613 transitions. [2022-11-22 02:34:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 02:34:50,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:50,062 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-22 02:34:50,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:50,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:50,274 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 510732614, now seen corresponding path program 1 times [2022-11-22 02:34:50,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:50,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363030164] [2022-11-22 02:34:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:50,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 02:34:51,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:51,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363030164] [2022-11-22 02:34:51,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363030164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975890211] [2022-11-22 02:34:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:51,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:51,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:51,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:34:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:34:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 52 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:34:52,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-22 02:34:53,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975890211] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:53,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:34:53,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 18 [2022-11-22 02:34:53,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082891656] [2022-11-22 02:34:53,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:53,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:53,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:53,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:34:53,129 INFO L87 Difference]: Start difference. First operand 13178 states and 17613 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:34:58,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:35:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:00,475 INFO L93 Difference]: Finished difference Result 29982 states and 40445 transitions. [2022-11-22 02:35:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:35:00,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2022-11-22 02:35:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:00,544 INFO L225 Difference]: With dead ends: 29982 [2022-11-22 02:35:00,545 INFO L226 Difference]: Without dead ends: 17547 [2022-11-22 02:35:00,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:35:00,581 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 552 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:00,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1887 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 628 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-22 02:35:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17547 states. [2022-11-22 02:35:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17547 to 15998. [2022-11-22 02:35:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15998 states, 10657 states have (on average 1.33029933377123) internal successors, (14177), 10898 states have internal predecessors, (14177), 3509 states have call successors, (3509), 1814 states have call predecessors, (3509), 1831 states have return successors, (3676), 3425 states have call predecessors, (3676), 3508 states have call successors, (3676) [2022-11-22 02:35:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15998 states to 15998 states and 21362 transitions. [2022-11-22 02:35:03,307 INFO L78 Accepts]: Start accepts. Automaton has 15998 states and 21362 transitions. Word has length 125 [2022-11-22 02:35:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:03,307 INFO L495 AbstractCegarLoop]: Abstraction has 15998 states and 21362 transitions. [2022-11-22 02:35:03,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:35:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 15998 states and 21362 transitions. [2022-11-22 02:35:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-22 02:35:03,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:03,342 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-22 02:35:03,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:35:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:35:03,555 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash 269932968, now seen corresponding path program 1 times [2022-11-22 02:35:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957824342] [2022-11-22 02:35:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 02:35:03,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957824342] [2022-11-22 02:35:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957824342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:03,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:35:03,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:35:03,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17373428] [2022-11-22 02:35:03,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:03,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:35:03,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:03,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:35:03,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:35:03,861 INFO L87 Difference]: Start difference. First operand 15998 states and 21362 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:35:08,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:35:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:11,094 INFO L93 Difference]: Finished difference Result 37976 states and 52315 transitions. [2022-11-22 02:35:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:35:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 139 [2022-11-22 02:35:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:11,186 INFO L225 Difference]: With dead ends: 37976 [2022-11-22 02:35:11,186 INFO L226 Difference]: Without dead ends: 22721 [2022-11-22 02:35:11,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:35:11,237 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 179 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:11,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1194 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-22 02:35:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22721 states. [2022-11-22 02:35:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22721 to 16154. [2022-11-22 02:35:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16154 states, 10753 states have (on average 1.3284664744722403) internal successors, (14285), 10994 states have internal predecessors, (14285), 3569 states have call successors, (3569), 1814 states have call predecessors, (3569), 1831 states have return successors, (3742), 3485 states have call predecessors, (3742), 3568 states have call successors, (3742) [2022-11-22 02:35:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16154 states to 16154 states and 21596 transitions. [2022-11-22 02:35:14,593 INFO L78 Accepts]: Start accepts. Automaton has 16154 states and 21596 transitions. Word has length 139 [2022-11-22 02:35:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:14,594 INFO L495 AbstractCegarLoop]: Abstraction has 16154 states and 21596 transitions. [2022-11-22 02:35:14,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:35:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 16154 states and 21596 transitions. [2022-11-22 02:35:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-22 02:35:14,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:14,619 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:14,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:35:14,620 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1549066949, now seen corresponding path program 1 times [2022-11-22 02:35:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:14,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538876179] [2022-11-22 02:35:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:35:14,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538876179] [2022-11-22 02:35:14,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538876179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:35:14,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139934060] [2022-11-22 02:35:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:14,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:14,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:14,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:35:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:35:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 02:35:15,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:35:15,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139934060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:15,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:35:15,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-22 02:35:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230932900] [2022-11-22 02:35:15,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:15,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:35:15,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:35:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:35:15,894 INFO L87 Difference]: Start difference. First operand 16154 states and 21596 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 02:35:20,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:35:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:22,397 INFO L93 Difference]: Finished difference Result 35144 states and 47853 transitions. [2022-11-22 02:35:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:35:22,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 150 [2022-11-22 02:35:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:22,474 INFO L225 Difference]: With dead ends: 35144 [2022-11-22 02:35:22,475 INFO L226 Difference]: Without dead ends: 19733 [2022-11-22 02:35:22,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:35:22,512 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 169 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:22,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1321 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 02:35:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19733 states. [2022-11-22 02:35:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19733 to 16160. [2022-11-22 02:35:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16160 states, 10759 states have (on average 1.3282832977042476) internal successors, (14291), 11000 states have internal predecessors, (14291), 3569 states have call successors, (3569), 1814 states have call predecessors, (3569), 1831 states have return successors, (3742), 3485 states have call predecessors, (3742), 3568 states have call successors, (3742) [2022-11-22 02:35:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16160 states to 16160 states and 21602 transitions. [2022-11-22 02:35:25,432 INFO L78 Accepts]: Start accepts. Automaton has 16160 states and 21602 transitions. Word has length 150 [2022-11-22 02:35:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:25,433 INFO L495 AbstractCegarLoop]: Abstraction has 16160 states and 21602 transitions. [2022-11-22 02:35:25,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 02:35:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 16160 states and 21602 transitions. [2022-11-22 02:35:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-22 02:35:25,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:25,455 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:25,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:35:25,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:35:25,666 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:25,666 INFO L85 PathProgramCache]: Analyzing trace with hash 944503728, now seen corresponding path program 1 times [2022-11-22 02:35:25,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:25,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704516947] [2022-11-22 02:35:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:25,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-22 02:35:27,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704516947] [2022-11-22 02:35:27,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704516947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:35:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464535071] [2022-11-22 02:35:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:27,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:27,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:27,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:27,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:35:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:35:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 64 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:35:28,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:35:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-22 02:35:28,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464535071] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:35:28,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:35:28,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 10] total 23 [2022-11-22 02:35:28,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846962197] [2022-11-22 02:35:28,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:28,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:35:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:35:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:35:28,538 INFO L87 Difference]: Start difference. First operand 16160 states and 21602 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:35:35,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:35:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:39,798 INFO L93 Difference]: Finished difference Result 39070 states and 53292 transitions. [2022-11-22 02:35:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:35:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 154 [2022-11-22 02:35:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:39,880 INFO L225 Difference]: With dead ends: 39070 [2022-11-22 02:35:39,880 INFO L226 Difference]: Without dead ends: 23653 [2022-11-22 02:35:39,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:35:39,920 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 970 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 124 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 2452 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:39,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 2452 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1576 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-11-22 02:35:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23653 states. [2022-11-22 02:35:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23653 to 16244. [2022-11-22 02:35:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16244 states, 10831 states have (on average 1.3272089373095743) internal successors, (14375), 11072 states have internal predecessors, (14375), 3581 states have call successors, (3581), 1814 states have call predecessors, (3581), 1831 states have return successors, (3754), 3497 states have call predecessors, (3754), 3580 states have call successors, (3754) [2022-11-22 02:35:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16244 states to 16244 states and 21710 transitions. [2022-11-22 02:35:42,680 INFO L78 Accepts]: Start accepts. Automaton has 16244 states and 21710 transitions. Word has length 154 [2022-11-22 02:35:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:42,681 INFO L495 AbstractCegarLoop]: Abstraction has 16244 states and 21710 transitions. [2022-11-22 02:35:42,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:35:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 16244 states and 21710 transitions. [2022-11-22 02:35:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-22 02:35:42,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:42,693 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:42,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:35:42,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:42,907 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash -970725581, now seen corresponding path program 1 times [2022-11-22 02:35:42,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:42,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882346030] [2022-11-22 02:35:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-22 02:35:43,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882346030] [2022-11-22 02:35:43,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882346030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:43,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:35:43,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:35:43,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666810082] [2022-11-22 02:35:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:43,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:35:43,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:35:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:35:43,724 INFO L87 Difference]: Start difference. First operand 16244 states and 21710 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:35:49,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:35:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:53,244 INFO L93 Difference]: Finished difference Result 38520 states and 53303 transitions. [2022-11-22 02:35:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:35:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 157 [2022-11-22 02:35:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:53,310 INFO L225 Difference]: With dead ends: 38520 [2022-11-22 02:35:53,310 INFO L226 Difference]: Without dead ends: 23019 [2022-11-22 02:35:53,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:35:53,348 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 172 mSDsluCounter, 3608 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 4373 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:53,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 4373 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 738 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-11-22 02:35:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23019 states. [2022-11-22 02:35:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23019 to 16280. [2022-11-22 02:35:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16280 states, 10861 states have (on average 1.3263051284412117) internal successors, (14405), 11090 states have internal predecessors, (14405), 3581 states have call successors, (3581), 1814 states have call predecessors, (3581), 1837 states have return successors, (3766), 3515 states have call predecessors, (3766), 3580 states have call successors, (3766) [2022-11-22 02:35:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16280 states to 16280 states and 21752 transitions. [2022-11-22 02:35:56,314 INFO L78 Accepts]: Start accepts. Automaton has 16280 states and 21752 transitions. Word has length 157 [2022-11-22 02:35:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:56,315 INFO L495 AbstractCegarLoop]: Abstraction has 16280 states and 21752 transitions. [2022-11-22 02:35:56,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:35:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16280 states and 21752 transitions. [2022-11-22 02:35:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-22 02:35:56,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:56,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:56,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 02:35:56,328 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash 371279014, now seen corresponding path program 1 times [2022-11-22 02:35:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:56,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608715574] [2022-11-22 02:35:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-22 02:35:58,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:58,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608715574] [2022-11-22 02:35:58,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608715574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:58,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:35:58,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 02:35:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771936839] [2022-11-22 02:35:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:35:58,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:35:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:35:58,944 INFO L87 Difference]: Start difference. First operand 16280 states and 21752 transitions. Second operand has 10 states, 7 states have (on average 13.0) internal successors, (91), 8 states have internal predecessors, (91), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:36:11,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:36:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:19,173 INFO L93 Difference]: Finished difference Result 28154 states and 38262 transitions. [2022-11-22 02:36:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:36:19,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 13.0) internal successors, (91), 8 states have internal predecessors, (91), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 161 [2022-11-22 02:36:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:19,249 INFO L225 Difference]: With dead ends: 28154 [2022-11-22 02:36:19,249 INFO L226 Difference]: Without dead ends: 27863 [2022-11-22 02:36:19,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:36:19,260 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 893 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 4174 mSolverCounterSat, 371 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 4546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 4174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:19,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 2282 Invalid, 4546 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [371 Valid, 4174 Invalid, 1 Unknown, 0 Unchecked, 14.7s Time] [2022-11-22 02:36:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27863 states. [2022-11-22 02:36:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27863 to 24555. [2022-11-22 02:36:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24555 states, 16432 states have (on average 1.3272273612463485) internal successors, (21809), 16774 states have internal predecessors, (21809), 5330 states have call successors, (5330), 2751 states have call predecessors, (5330), 2792 states have return successors, (5587), 5221 states have call predecessors, (5587), 5329 states have call successors, (5587) [2022-11-22 02:36:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24555 states to 24555 states and 32726 transitions. [2022-11-22 02:36:23,511 INFO L78 Accepts]: Start accepts. Automaton has 24555 states and 32726 transitions. Word has length 161 [2022-11-22 02:36:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:23,512 INFO L495 AbstractCegarLoop]: Abstraction has 24555 states and 32726 transitions. [2022-11-22 02:36:23,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 13.0) internal successors, (91), 8 states have internal predecessors, (91), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:36:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24555 states and 32726 transitions. [2022-11-22 02:36:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-22 02:36:23,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:23,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:36:23,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-22 02:36:23,544 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash 78922955, now seen corresponding path program 1 times [2022-11-22 02:36:23,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:23,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746997975] [2022-11-22 02:36:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:23,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:36:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 02:36:25,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:36:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746997975] [2022-11-22 02:36:25,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746997975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:36:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695227295] [2022-11-22 02:36:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:25,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:25,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:25,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b044100-5346-42d3-8550-02f04a67d06a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:36:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:36:26,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-22 02:36:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 74 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-22 02:36:26,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 02:36:27,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695227295] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:36:27,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:27,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 13] total 29 [2022-11-22 02:36:27,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451811457] [2022-11-22 02:36:27,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:36:27,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:36:27,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:36:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:36:27,481 INFO L87 Difference]: Start difference. First operand 24555 states and 32726 transitions. Second operand has 10 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-22 02:36:36,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:36:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:53,000 INFO L93 Difference]: Finished difference Result 87930 states and 125884 transitions. [2022-11-22 02:36:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:36:53,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 205 [2022-11-22 02:36:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:53,195 INFO L225 Difference]: With dead ends: 87930 [2022-11-22 02:36:53,195 INFO L226 Difference]: Without dead ends: 65869 [2022-11-22 02:36:53,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 02:36:53,241 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 1448 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 4652 mSolverCounterSat, 570 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 4773 SdHoareTripleChecker+Invalid, 5223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 4652 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:53,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 4773 Invalid, 5223 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [570 Valid, 4652 Invalid, 1 Unknown, 0 Unchecked, 12.1s Time] [2022-11-22 02:36:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65869 states.