./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2689726c89c7be154f3b0bf0875aa4770854a9a3388665dc7aff0604f303b757 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:07:45,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:07:45,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:07:45,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:07:45,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:07:45,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:07:45,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:07:45,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:07:45,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:07:45,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:07:45,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:07:45,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:07:45,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:07:45,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:07:45,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:07:45,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:07:45,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:07:45,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:07:45,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:07:45,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:07:45,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:07:45,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:07:45,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:07:45,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:07:45,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:07:45,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:07:45,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:07:45,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:07:45,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:07:45,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:07:45,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:07:45,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:07:45,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:07:45,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:07:45,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:07:45,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:07:45,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:07:45,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:07:45,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:07:45,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:07:45,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:07:45,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:07:45,556 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:07:45,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:07:45,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:07:45,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:07:45,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:07:45,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:07:45,558 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:07:45,558 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:07:45,558 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:07:45,559 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:07:45,560 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:07:45,560 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:07:45,560 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:07:45,560 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:07:45,560 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:07:45,561 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:07:45,561 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:07:45,561 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:07:45,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:07:45,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:07:45,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:07:45,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:07:45,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:07:45,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:07:45,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:07:45,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:07:45,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:07:45,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:07:45,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:07:45,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:07:45,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:07:45,565 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:07:45,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:07:45,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:07:45,565 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:07:45,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:07:45,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:07:45,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:07:45,566 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_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2689726c89c7be154f3b0bf0875aa4770854a9a3388665dc7aff0604f303b757 [2022-11-19 08:07:45,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:07:45,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:07:45,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:07:45,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:07:45,872 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:07:45,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2022-11-19 08:07:45,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/data/1714feaa0/ef0ebcf45e1d4497bcb87594a045372b/FLAGcaf861e8e [2022-11-19 08:07:46,955 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:07:46,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2022-11-19 08:07:46,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/data/1714feaa0/ef0ebcf45e1d4497bcb87594a045372b/FLAGcaf861e8e [2022-11-19 08:07:47,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/data/1714feaa0/ef0ebcf45e1d4497bcb87594a045372b [2022-11-19 08:07:47,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:07:47,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:07:47,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:07:47,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:07:47,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:07:47,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:47" (1/1) ... [2022-11-19 08:07:47,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db0c136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:47, skipping insertion in model container [2022-11-19 08:07:47,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:47" (1/1) ... [2022-11-19 08:07:47,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:07:47,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:07:49,500 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i[258393,258406] [2022-11-19 08:07:49,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:07:49,675 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:07:50,177 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i[258393,258406] [2022-11-19 08:07:50,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:07:50,324 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:07:50,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50 WrapperNode [2022-11-19 08:07:50,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:07:50,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:07:50,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:07:50,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:07:50,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,653 INFO L138 Inliner]: procedures = 303, calls = 3997, calls flagged for inlining = 138, calls inlined = 95, statements flattened = 5185 [2022-11-19 08:07:50,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:07:50,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:07:50,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:07:50,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:07:50,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:50,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:07:50,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:07:50,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:07:50,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:07:50,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (1/1) ... [2022-11-19 08:07:51,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:07:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:51,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:07:51,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:07:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure rio_uevent [2022-11-19 08:07:51,082 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_uevent [2022-11-19 08:07:51,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2022-11-19 08:07:51,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2022-11-19 08:07:51,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:07:51,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:07:51,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 08:07:51,083 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 08:07:51,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:07:51,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:07:51,083 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2022-11-19 08:07:51,083 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2022-11-19 08:07:51,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2022-11-19 08:07:51,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2022-11-19 08:07:51,084 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-19 08:07:51,084 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-19 08:07:51,084 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 08:07:51,084 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 08:07:51,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:07:51,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:07:51,085 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_16 [2022-11-19 08:07:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_16 [2022-11-19 08:07:51,085 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2022-11-19 08:07:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2022-11-19 08:07:51,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 08:07:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 08:07:51,085 INFO L130 BoogieDeclarations]: Found specification of procedure rio_device_remove [2022-11-19 08:07:51,086 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_device_remove [2022-11-19 08:07:51,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:07:51,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:07:51,086 INFO L130 BoogieDeclarations]: Found specification of procedure bus_scan_store [2022-11-19 08:07:51,086 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_scan_store [2022-11-19 08:07:51,086 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 08:07:51,086 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 08:07:51,087 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-19 08:07:51,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-19 08:07:51,087 INFO L130 BoogieDeclarations]: Found specification of procedure disc_work_handler [2022-11-19 08:07:51,087 INFO L138 BoogieDeclarations]: Found implementation of procedure disc_work_handler [2022-11-19 08:07:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:07:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure rio_dev_put [2022-11-19 08:07:51,088 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_dev_put [2022-11-19 08:07:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:07:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2022-11-19 08:07:51,088 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2022-11-19 08:07:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 08:07:51,089 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 08:07:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_16 [2022-11-19 08:07:51,089 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_16 [2022-11-19 08:07:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:07:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:07:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure rio_mport_read_config_32 [2022-11-19 08:07:51,091 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_mport_read_config_32 [2022-11-19 08:07:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure rio_mport_write_config_32 [2022-11-19 08:07:51,091 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_mport_write_config_32 [2022-11-19 08:07:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-19 08:07:51,092 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-19 08:07:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-19 08:07:51,092 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-19 08:07:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure rio_name [2022-11-19 08:07:51,093 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_name [2022-11-19 08:07:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-19 08:07:51,093 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-19 08:07:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure rio_device_probe [2022-11-19 08:07:51,094 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_device_probe [2022-11-19 08:07:51,094 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 08:07:51,094 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 08:07:51,094 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_32 [2022-11-19 08:07:51,094 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_32 [2022-11-19 08:07:51,094 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2022-11-19 08:07:51,094 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2022-11-19 08:07:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:07:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~~u32~0~TO~int [2022-11-19 08:07:51,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~~u32~0~TO~int [2022-11-19 08:07:51,096 INFO L130 BoogieDeclarations]: Found specification of procedure rio_dev_get [2022-11-19 08:07:51,096 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_dev_get [2022-11-19 08:07:51,096 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:07:51,096 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:07:51,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:07:51,096 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:07:51,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:07:51,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 08:07:51,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 08:07:51,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:07:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 08:07:51,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 08:07:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:07:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:07:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 08:07:51,099 INFO L130 BoogieDeclarations]: Found specification of procedure release_resource [2022-11-19 08:07:51,099 INFO L138 BoogieDeclarations]: Found implementation of procedure release_resource [2022-11-19 08:07:51,100 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_8 [2022-11-19 08:07:51,100 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_8 [2022-11-19 08:07:51,100 INFO L130 BoogieDeclarations]: Found specification of procedure rio_match_bus [2022-11-19 08:07:51,101 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_match_bus [2022-11-19 08:07:51,101 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_32 [2022-11-19 08:07:51,101 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_32 [2022-11-19 08:07:51,101 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2022-11-19 08:07:51,101 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2022-11-19 08:07:51,101 INFO L130 BoogieDeclarations]: Found specification of procedure rio_match_device [2022-11-19 08:07:51,101 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_match_device [2022-11-19 08:07:51,102 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 08:07:51,102 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 08:07:51,102 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_8 [2022-11-19 08:07:51,102 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_8 [2022-11-19 08:07:51,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:07:51,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:07:51,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:07:51,103 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~$Pointer$~TO~int [2022-11-19 08:07:51,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~$Pointer$~TO~int [2022-11-19 08:07:51,996 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:07:52,000 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:07:52,219 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:07:57,964 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:07:58,875 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:07:58,875 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:07:58,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:58 BoogieIcfgContainer [2022-11-19 08:07:58,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:07:58,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:07:58,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:07:58,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:07:58,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:07:47" (1/3) ... [2022-11-19 08:07:58,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ae3729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:58, skipping insertion in model container [2022-11-19 08:07:58,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:50" (2/3) ... [2022-11-19 08:07:58,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ae3729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:58, skipping insertion in model container [2022-11-19 08:07:58,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:58" (3/3) ... [2022-11-19 08:07:58,906 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2022-11-19 08:07:58,926 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:07:58,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:07:58,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:07:59,000 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;@1841e6ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:07:59,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:07:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 720 states, 474 states have (on average 1.3924050632911393) internal successors, (660), 505 states have internal predecessors, (660), 197 states have call successors, (197), 48 states have call predecessors, (197), 47 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) [2022-11-19 08:07:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:07:59,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:59,019 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:59,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2009775380, now seen corresponding path program 1 times [2022-11-19 08:07:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068264472] [2022-11-19 08:07:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:59,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 08:08:00,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068264472] [2022-11-19 08:08:00,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068264472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:00,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:00,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:00,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879800575] [2022-11-19 08:08:00,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:00,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:00,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:00,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:00,440 INFO L87 Difference]: Start difference. First operand has 720 states, 474 states have (on average 1.3924050632911393) internal successors, (660), 505 states have internal predecessors, (660), 197 states have call successors, (197), 48 states have call predecessors, (197), 47 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 08:08:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:01,593 INFO L93 Difference]: Finished difference Result 2124 states and 3089 transitions. [2022-11-19 08:08:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2022-11-19 08:08:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:01,618 INFO L225 Difference]: With dead ends: 2124 [2022-11-19 08:08:01,619 INFO L226 Difference]: Without dead ends: 1369 [2022-11-19 08:08:01,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:01,638 INFO L413 NwaCegarLoop]: 1097 mSDtfsCounter, 983 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:01,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 2018 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:08:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-11-19 08:08:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1366. [2022-11-19 08:08:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 930 states have (on average 1.3483870967741935) internal successors, (1254), 947 states have internal predecessors, (1254), 343 states have call successors, (343), 93 states have call predecessors, (343), 92 states have return successors, (341), 339 states have call predecessors, (341), 341 states have call successors, (341) [2022-11-19 08:08:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1938 transitions. [2022-11-19 08:08:01,824 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1938 transitions. Word has length 64 [2022-11-19 08:08:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:01,825 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1938 transitions. [2022-11-19 08:08:01,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 08:08:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1938 transitions. [2022-11-19 08:08:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:08:01,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:01,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:01,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:08:01,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:01,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:01,837 INFO L85 PathProgramCache]: Analyzing trace with hash -362769064, now seen corresponding path program 1 times [2022-11-19 08:08:01,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:01,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326138038] [2022-11-19 08:08:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 08:08:02,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:02,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326138038] [2022-11-19 08:08:02,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326138038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:02,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:02,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590092620] [2022-11-19 08:08:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:02,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:02,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:02,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:02,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:02,501 INFO L87 Difference]: Start difference. First operand 1366 states and 1938 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:08:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:03,348 INFO L93 Difference]: Finished difference Result 2640 states and 3778 transitions. [2022-11-19 08:08:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2022-11-19 08:08:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:03,370 INFO L225 Difference]: With dead ends: 2640 [2022-11-19 08:08:03,370 INFO L226 Difference]: Without dead ends: 2635 [2022-11-19 08:08:03,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:03,375 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 899 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:03,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 1945 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:08:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-11-19 08:08:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2625. [2022-11-19 08:08:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 1792 states have (on average 1.3532366071428572) internal successors, (2425), 1833 states have internal predecessors, (2425), 656 states have call successors, (656), 179 states have call predecessors, (656), 176 states have return successors, (674), 640 states have call predecessors, (674), 654 states have call successors, (674) [2022-11-19 08:08:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3755 transitions. [2022-11-19 08:08:03,527 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3755 transitions. Word has length 67 [2022-11-19 08:08:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:03,529 INFO L495 AbstractCegarLoop]: Abstraction has 2625 states and 3755 transitions. [2022-11-19 08:08:03,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:08:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3755 transitions. [2022-11-19 08:08:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 08:08:03,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:03,535 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:08:03,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 59157875, now seen corresponding path program 1 times [2022-11-19 08:08:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782656834] [2022-11-19 08:08:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 08:08:04,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782656834] [2022-11-19 08:08:04,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782656834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:04,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:04,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:04,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534287479] [2022-11-19 08:08:04,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:04,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:04,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:04,197 INFO L87 Difference]: Start difference. First operand 2625 states and 3755 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:08:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:05,193 INFO L93 Difference]: Finished difference Result 7755 states and 11068 transitions. [2022-11-19 08:08:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-11-19 08:08:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:05,225 INFO L225 Difference]: With dead ends: 7755 [2022-11-19 08:08:05,225 INFO L226 Difference]: Without dead ends: 5139 [2022-11-19 08:08:05,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:05,238 INFO L413 NwaCegarLoop]: 1051 mSDtfsCounter, 934 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:05,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 1907 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:08:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2022-11-19 08:08:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 5131. [2022-11-19 08:08:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5131 states, 3498 states have (on average 1.349056603773585) internal successors, (4719), 3581 states have internal predecessors, (4719), 1280 states have call successors, (1280), 357 states have call predecessors, (1280), 352 states have return successors, (1316), 1248 states have call predecessors, (1316), 1278 states have call successors, (1316) [2022-11-19 08:08:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 7315 transitions. [2022-11-19 08:08:05,616 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 7315 transitions. Word has length 91 [2022-11-19 08:08:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:05,616 INFO L495 AbstractCegarLoop]: Abstraction has 5131 states and 7315 transitions. [2022-11-19 08:08:05,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:08:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 7315 transitions. [2022-11-19 08:08:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 08:08:05,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:05,623 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:05,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:08:05,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1083232291, now seen corresponding path program 1 times [2022-11-19 08:08:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398778027] [2022-11-19 08:08:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:05,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 08:08:06,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:06,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398778027] [2022-11-19 08:08:06,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398778027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:06,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:06,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:06,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857612122] [2022-11-19 08:08:06,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:06,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:06,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:06,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:06,258 INFO L87 Difference]: Start difference. First operand 5131 states and 7315 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:08:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:07,335 INFO L93 Difference]: Finished difference Result 14927 states and 21236 transitions. [2022-11-19 08:08:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2022-11-19 08:08:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:07,399 INFO L225 Difference]: With dead ends: 14927 [2022-11-19 08:08:07,399 INFO L226 Difference]: Without dead ends: 9805 [2022-11-19 08:08:07,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:07,425 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 919 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:07,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 2010 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:08:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2022-11-19 08:08:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9795. [2022-11-19 08:08:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9795 states, 6666 states have (on average 1.3427842784278428) internal successors, (8951), 6821 states have internal predecessors, (8951), 2448 states have call successors, (2448), 689 states have call predecessors, (2448), 680 states have return successors, (2518), 2388 states have call predecessors, (2518), 2446 states have call successors, (2518) [2022-11-19 08:08:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9795 states to 9795 states and 13917 transitions. [2022-11-19 08:08:08,137 INFO L78 Accepts]: Start accepts. Automaton has 9795 states and 13917 transitions. Word has length 103 [2022-11-19 08:08:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:08,139 INFO L495 AbstractCegarLoop]: Abstraction has 9795 states and 13917 transitions. [2022-11-19 08:08:08,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:08:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9795 states and 13917 transitions. [2022-11-19 08:08:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-19 08:08:08,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:08,150 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:08:08,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 541395610, now seen corresponding path program 1 times [2022-11-19 08:08:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:08,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574908247] [2022-11-19 08:08:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-19 08:08:08,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:08,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574908247] [2022-11-19 08:08:08,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574908247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:08,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:08,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460835958] [2022-11-19 08:08:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:08,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:08,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:08,785 INFO L87 Difference]: Start difference. First operand 9795 states and 13917 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:08:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:10,195 INFO L93 Difference]: Finished difference Result 27061 states and 38366 transitions. [2022-11-19 08:08:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 130 [2022-11-19 08:08:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:10,276 INFO L225 Difference]: With dead ends: 27061 [2022-11-19 08:08:10,277 INFO L226 Difference]: Without dead ends: 17275 [2022-11-19 08:08:10,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:10,322 INFO L413 NwaCegarLoop]: 1164 mSDtfsCounter, 746 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:10,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 2034 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:08:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17275 states. [2022-11-19 08:08:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17275 to 17237. [2022-11-19 08:08:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17237 states, 11880 states have (on average 1.3411616161616162) internal successors, (15933), 12073 states have internal predecessors, (15933), 4196 states have call successors, (4196), 1169 states have call predecessors, (4196), 1160 states have return successors, (4274), 4122 states have call predecessors, (4274), 4194 states have call successors, (4274) [2022-11-19 08:08:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17237 states to 17237 states and 24403 transitions. [2022-11-19 08:08:11,574 INFO L78 Accepts]: Start accepts. Automaton has 17237 states and 24403 transitions. Word has length 130 [2022-11-19 08:08:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:11,577 INFO L495 AbstractCegarLoop]: Abstraction has 17237 states and 24403 transitions. [2022-11-19 08:08:11,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:08:11,577 INFO L276 IsEmpty]: Start isEmpty. Operand 17237 states and 24403 transitions. [2022-11-19 08:08:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 08:08:11,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:11,586 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2022-11-19 08:08:11,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:08:11,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:11,589 INFO L85 PathProgramCache]: Analyzing trace with hash 330198735, now seen corresponding path program 1 times [2022-11-19 08:08:11,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:11,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510176918] [2022-11-19 08:08:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:11,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-19 08:08:12,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:12,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510176918] [2022-11-19 08:08:12,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510176918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:12,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:12,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:12,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683144515] [2022-11-19 08:08:12,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:12,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:12,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:12,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:12,413 INFO L87 Difference]: Start difference. First operand 17237 states and 24403 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:08:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:14,309 INFO L93 Difference]: Finished difference Result 42915 states and 60778 transitions. [2022-11-19 08:08:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2022-11-19 08:08:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:14,421 INFO L225 Difference]: With dead ends: 42915 [2022-11-19 08:08:14,421 INFO L226 Difference]: Without dead ends: 25687 [2022-11-19 08:08:14,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:14,475 INFO L413 NwaCegarLoop]: 1459 mSDtfsCounter, 940 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:14,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 2318 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:08:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25687 states. [2022-11-19 08:08:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25687 to 25679. [2022-11-19 08:08:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25679 states, 17758 states have (on average 1.3386079513458722) internal successors, (23771), 18037 states have internal predecessors, (23771), 6192 states have call successors, (6192), 1741 states have call predecessors, (6192), 1728 states have return successors, (6306), 6084 states have call predecessors, (6306), 6190 states have call successors, (6306) [2022-11-19 08:08:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25679 states to 25679 states and 36269 transitions. [2022-11-19 08:08:15,963 INFO L78 Accepts]: Start accepts. Automaton has 25679 states and 36269 transitions. Word has length 159 [2022-11-19 08:08:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:15,964 INFO L495 AbstractCegarLoop]: Abstraction has 25679 states and 36269 transitions. [2022-11-19 08:08:15,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:08:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 25679 states and 36269 transitions. [2022-11-19 08:08:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-19 08:08:15,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:15,978 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2022-11-19 08:08:15,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:08:15,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1276364601, now seen corresponding path program 1 times [2022-11-19 08:08:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:15,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987699372] [2022-11-19 08:08:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:15,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-19 08:08:16,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987699372] [2022-11-19 08:08:16,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987699372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:16,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:16,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431601575] [2022-11-19 08:08:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:16,677 INFO L87 Difference]: Start difference. First operand 25679 states and 36269 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:08:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:19,182 INFO L93 Difference]: Finished difference Result 63785 states and 90134 transitions. [2022-11-19 08:08:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:19,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 171 [2022-11-19 08:08:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:19,334 INFO L225 Difference]: With dead ends: 63785 [2022-11-19 08:08:19,334 INFO L226 Difference]: Without dead ends: 38115 [2022-11-19 08:08:19,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:19,403 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 926 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:19,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 2309 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:08:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38115 states. [2022-11-19 08:08:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38115 to 38097. [2022-11-19 08:08:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38097 states, 26440 states have (on average 1.3359682299546143) internal successors, (35323), 26837 states have internal predecessors, (35323), 9102 states have call successors, (9102), 2573 states have call predecessors, (9102), 2554 states have return successors, (9268), 8946 states have call predecessors, (9268), 9100 states have call successors, (9268) [2022-11-19 08:08:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38097 states to 38097 states and 53693 transitions. [2022-11-19 08:08:21,670 INFO L78 Accepts]: Start accepts. Automaton has 38097 states and 53693 transitions. Word has length 171 [2022-11-19 08:08:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:21,671 INFO L495 AbstractCegarLoop]: Abstraction has 38097 states and 53693 transitions. [2022-11-19 08:08:21,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:08:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 38097 states and 53693 transitions. [2022-11-19 08:08:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-19 08:08:21,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:21,683 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:21,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:08:21,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:21,684 INFO L85 PathProgramCache]: Analyzing trace with hash 229560818, now seen corresponding path program 1 times [2022-11-19 08:08:21,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:21,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853159451] [2022-11-19 08:08:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:21,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-11-19 08:08:24,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853159451] [2022-11-19 08:08:24,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853159451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:24,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:24,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:08:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269378677] [2022-11-19 08:08:24,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:24,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:08:24,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:08:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:08:24,122 INFO L87 Difference]: Start difference. First operand 38097 states and 53693 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:08:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:27,765 INFO L93 Difference]: Finished difference Result 88699 states and 125164 transitions. [2022-11-19 08:08:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:08:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 176 [2022-11-19 08:08:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:28,115 INFO L225 Difference]: With dead ends: 88699 [2022-11-19 08:08:28,116 INFO L226 Difference]: Without dead ends: 50611 [2022-11-19 08:08:28,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:08:28,210 INFO L413 NwaCegarLoop]: 1472 mSDtfsCounter, 978 mSDsluCounter, 4281 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 5753 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:28,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 5753 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:08:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50611 states. [2022-11-19 08:08:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50611 to 50435. [2022-11-19 08:08:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50435 states, 35026 states have (on average 1.3346371267058756) internal successors, (46747), 35565 states have internal predecessors, (46747), 12032 states have call successors, (12032), 3377 states have call predecessors, (12032), 3376 states have return successors, (12282), 11852 states have call predecessors, (12282), 12030 states have call successors, (12282) [2022-11-19 08:08:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 71061 transitions. [2022-11-19 08:08:31,025 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 71061 transitions. Word has length 176 [2022-11-19 08:08:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:31,026 INFO L495 AbstractCegarLoop]: Abstraction has 50435 states and 71061 transitions. [2022-11-19 08:08:31,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:08:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 71061 transitions. [2022-11-19 08:08:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-19 08:08:31,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:31,047 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-11-19 08:08:31,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:08:31,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1550272066, now seen corresponding path program 1 times [2022-11-19 08:08:31,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:31,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699402530] [2022-11-19 08:08:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-11-19 08:08:33,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:33,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699402530] [2022-11-19 08:08:33,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699402530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:33,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:33,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:08:33,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527717194] [2022-11-19 08:08:33,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:33,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:08:33,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:08:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:08:33,324 INFO L87 Difference]: Start difference. First operand 50435 states and 71061 transitions. Second operand has 6 states, 4 states have (on average 17.75) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:08:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:35,828 INFO L93 Difference]: Finished difference Result 101245 states and 142925 transitions. [2022-11-19 08:08:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:08:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 17.75) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 198 [2022-11-19 08:08:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:36,022 INFO L225 Difference]: With dead ends: 101245 [2022-11-19 08:08:36,022 INFO L226 Difference]: Without dead ends: 50531 [2022-11-19 08:08:36,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:08:36,168 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 3 mSDsluCounter, 3499 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4378 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:36,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4378 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:08:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50531 states. [2022-11-19 08:08:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50531 to 50531. [2022-11-19 08:08:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50531 states, 35122 states have (on average 1.3337224531632594) internal successors, (46843), 35661 states have internal predecessors, (46843), 12032 states have call successors, (12032), 3377 states have call predecessors, (12032), 3376 states have return successors, (12282), 11852 states have call predecessors, (12282), 12030 states have call successors, (12282) [2022-11-19 08:08:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50531 states to 50531 states and 71157 transitions. [2022-11-19 08:08:38,870 INFO L78 Accepts]: Start accepts. Automaton has 50531 states and 71157 transitions. Word has length 198 [2022-11-19 08:08:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:38,871 INFO L495 AbstractCegarLoop]: Abstraction has 50531 states and 71157 transitions. [2022-11-19 08:08:38,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 17.75) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:08:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 50531 states and 71157 transitions. [2022-11-19 08:08:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-19 08:08:38,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:38,890 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-11-19 08:08:38,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:08:38,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash 264561076, now seen corresponding path program 1 times [2022-11-19 08:08:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294541567] [2022-11-19 08:08:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:38,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-11-19 08:08:43,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:43,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294541567] [2022-11-19 08:08:43,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294541567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:43,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:43,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:08:43,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608718134] [2022-11-19 08:08:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:43,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:08:43,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:43,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:08:43,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:08:43,202 INFO L87 Difference]: Start difference. First operand 50531 states and 71157 transitions. Second operand has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:08:52,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:54,008 INFO L93 Difference]: Finished difference Result 83279 states and 119331 transitions. [2022-11-19 08:08:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:08:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 199 [2022-11-19 08:08:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:54,406 INFO L225 Difference]: With dead ends: 83279 [2022-11-19 08:08:54,406 INFO L226 Difference]: Without dead ends: 83276 [2022-11-19 08:08:54,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:08:54,438 INFO L413 NwaCegarLoop]: 1644 mSDtfsCounter, 4124 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 1684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4308 SdHoareTripleChecker+Valid, 4759 SdHoareTripleChecker+Invalid, 6273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1684 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:54,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4308 Valid, 4759 Invalid, 6273 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1684 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-19 08:08:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83276 states. [2022-11-19 08:08:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83276 to 81615. [2022-11-19 08:08:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81615 states, 56321 states have (on average 1.3327355693258287) internal successors, (75061), 57363 states have internal predecessors, (75061), 19827 states have call successors, (19827), 5131 states have call predecessors, (19827), 5466 states have return successors, (21733), 19948 states have call predecessors, (21733), 19825 states have call successors, (21733) [2022-11-19 08:08:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81615 states to 81615 states and 116621 transitions. [2022-11-19 08:08:58,204 INFO L78 Accepts]: Start accepts. Automaton has 81615 states and 116621 transitions. Word has length 199 [2022-11-19 08:08:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:58,205 INFO L495 AbstractCegarLoop]: Abstraction has 81615 states and 116621 transitions. [2022-11-19 08:08:58,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:08:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 81615 states and 116621 transitions. [2022-11-19 08:08:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-19 08:08:58,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:58,228 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:58,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:08:58,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:58,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1804624860, now seen corresponding path program 1 times [2022-11-19 08:08:58,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:58,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214296195] [2022-11-19 08:08:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:58,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-11-19 08:09:00,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:00,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214296195] [2022-11-19 08:09:00,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214296195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:00,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077072167] [2022-11-19 08:09:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:00,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:00,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:00,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:00,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd4e937-a0f5-41e2-a750-32cd3343920e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:09:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:02,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 7676 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:09:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-11-19 08:09:03,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:03,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077072167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:03,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:03,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 15 [2022-11-19 08:09:03,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911436836] [2022-11-19 08:09:03,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:03,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:09:03,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:03,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:09:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:09:03,394 INFO L87 Difference]: Start difference. First operand 81615 states and 116621 transitions. Second operand has 10 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 08:09:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:19,067 INFO L93 Difference]: Finished difference Result 207383 states and 306231 transitions. [2022-11-19 08:09:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:09:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 205 [2022-11-19 08:09:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:19,747 INFO L225 Difference]: With dead ends: 207383 [2022-11-19 08:09:19,747 INFO L226 Difference]: Without dead ends: 207380 [2022-11-19 08:09:19,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:09:19,808 INFO L413 NwaCegarLoop]: 1747 mSDtfsCounter, 2182 mSDsluCounter, 8267 mSDsCounter, 0 mSdLazyCounter, 9182 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 10014 SdHoareTripleChecker+Invalid, 10157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 9182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:19,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2422 Valid, 10014 Invalid, 10157 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [975 Valid, 9182 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-19 08:09:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207380 states.