./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI --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 c3c8f5f42e93f38ff45b5fb218b90423c4fa8214795cc0db5e91266a2717c97b --- 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-5e519f3 [2022-11-03 02:32:37,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:32:37,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:32:37,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:32:37,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:32:37,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:32:37,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:32:37,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:32:37,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:32:37,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:32:37,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:32:37,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:32:37,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:32:37,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:32:37,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:32:37,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:32:37,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:32:37,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:32:37,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:32:37,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:32:37,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:32:37,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:32:37,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:32:37,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:32:37,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:32:37,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:32:37,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:32:37,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:32:37,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:32:37,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:32:37,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:32:37,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:32:37,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:32:37,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:32:37,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:32:37,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:32:37,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:32:37,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:32:37,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:32:37,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:32:37,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:32:37,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:32:37,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:32:37,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:32:37,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:32:37,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:32:37,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:32:37,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:32:37,445 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:32:37,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:32:37,446 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:32:37,446 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:32:37,446 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:32:37,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:32:37,447 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:32:37,447 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:32:37,448 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:32:37,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:32:37,449 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:32:37,449 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:32:37,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:32:37,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:32:37,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:32:37,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:32:37,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:32:37,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:32:37,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:32:37,452 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:32:37,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:32:37,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:32:37,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:32:37,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:32:37,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:32:37,453 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:32:37,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:32:37,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:32:37,454 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:32:37,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:32:37,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:32:37,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:32:37,455 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_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3c8f5f42e93f38ff45b5fb218b90423c4fa8214795cc0db5e91266a2717c97b [2022-11-03 02:32:37,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:32:37,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:32:37,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:32:37,831 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:32:37,832 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:32:37,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i [2022-11-03 02:32:37,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/data/b2042d89b/56b4c42a8d084d70b7d1fe5c2721b21b/FLAG092790f36 [2022-11-03 02:32:38,889 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:32:38,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i [2022-11-03 02:32:38,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/data/b2042d89b/56b4c42a8d084d70b7d1fe5c2721b21b/FLAG092790f36 [2022-11-03 02:32:39,303 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/data/b2042d89b/56b4c42a8d084d70b7d1fe5c2721b21b [2022-11-03 02:32:39,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:32:39,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:32:39,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:32:39,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:32:39,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:32:39,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:32:39" (1/1) ... [2022-11-03 02:32:39,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef0b913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:39, skipping insertion in model container [2022-11-03 02:32:39,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:32:39" (1/1) ... [2022-11-03 02:32:39,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:32:39,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:32:40,347 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i[98402,98415] [2022-11-03 02:32:41,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:32:41,487 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:32:41,611 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i[98402,98415] [2022-11-03 02:32:42,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:32:42,144 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:32:42,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42 WrapperNode [2022-11-03 02:32:42,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:32:42,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:32:42,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:32:42,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:32:42,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,453 INFO L138 Inliner]: procedures = 256, calls = 2394, calls flagged for inlining = 116, calls inlined = 95, statements flattened = 3925 [2022-11-03 02:32:42,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:32:42,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:32:42,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:32:42,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:32:42,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,625 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:32:42,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:32:42,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:32:42,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:32:42,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (1/1) ... [2022-11-03 02:32:42,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:32:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:42,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:32:42,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc45659-2f25-42ed-bf27-53b2359967c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:32:42,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-03 02:32:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-03 02:32:42,770 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-03 02:32:42,771 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-03 02:32:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:32:42,771 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:32:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-03 02:32:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:32:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:32:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:32:42,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:32:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2022-11-03 02:32:42,772 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2022-11-03 02:32:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 02:32:42,772 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 02:32:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2022-11-03 02:32:42,774 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2022-11-03 02:32:42,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:32:42,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:32:42,774 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2022-11-03 02:32:42,774 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2022-11-03 02:32:42,774 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2022-11-03 02:32:42,775 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2022-11-03 02:32:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:32:42,775 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:32:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:32:42,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:32:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2022-11-03 02:32:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2022-11-03 02:32:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2022-11-03 02:32:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2022-11-03 02:32:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-03 02:32:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-03 02:32:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:32:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:32:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:32:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:32:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 02:32:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 02:32:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_driver_lock [2022-11-03 02:32:42,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_driver_lock [2022-11-03 02:32:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:32:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2022-11-03 02:32:42,778 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2022-11-03 02:32:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:32:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2022-11-03 02:32:42,779 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2022-11-03 02:32:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-03 02:32:42,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-03 02:32:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:32:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:32:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 02:32:42,783 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 02:32:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:32:42,783 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:32:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 02:32:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 02:32:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2022-11-03 02:32:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2022-11-03 02:32:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2022-11-03 02:32:42,785 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2022-11-03 02:32:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 02:32:42,786 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 02:32:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:32:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 02:32:42,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 02:32:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-03 02:32:42,786 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-03 02:32:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2022-11-03 02:32:42,787 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2022-11-03 02:32:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-03 02:32:42,787 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-03 02:32:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:32:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2022-11-03 02:32:42,788 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2022-11-03 02:32:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_group [2022-11-03 02:32:42,789 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_group [2022-11-03 02:32:42,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:32:42,789 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-03 02:32:42,789 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-03 02:32:42,789 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2022-11-03 02:32:42,789 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2022-11-03 02:32:42,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:32:42,790 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:32:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure lcd_write [2022-11-03 02:32:42,791 INFO L138 BoogieDeclarations]: Found implementation of procedure lcd_write [2022-11-03 02:32:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:32:42,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:32:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:32:42,792 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:32:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-03 02:32:42,792 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-03 02:32:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:32:42,794 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:32:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:32:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure usb_to_input_id [2022-11-03 02:32:42,794 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_to_input_id [2022-11-03 02:32:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2022-11-03 02:32:42,795 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2022-11-03 02:32:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2022-11-03 02:32:42,795 INFO L138 BoogieDeclarations]: Found implementation of procedure noop_llseek [2022-11-03 02:32:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:32:42,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:32:42,796 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2022-11-03 02:32:42,796 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2022-11-03 02:32:42,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:32:42,796 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2022-11-03 02:32:42,796 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2022-11-03 02:32:42,796 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2022-11-03 02:32:42,797 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2022-11-03 02:32:42,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-03 02:32:42,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-03 02:32:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-03 02:32:42,801 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-03 02:32:42,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:32:42,802 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2022-11-03 02:32:42,803 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2022-11-03 02:32:42,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:32:42,803 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2022-11-03 02:32:42,803 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2022-11-03 02:32:42,810 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:32:42,810 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-11-03 02:32:42,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-11-03 02:32:42,810 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2022-11-03 02:32:42,810 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2022-11-03 02:32:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2022-11-03 02:32:42,811 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2022-11-03 02:32:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:32:42,811 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:32:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_driver_lock [2022-11-03 02:32:42,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_driver_lock [2022-11-03 02:32:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2022-11-03 02:32:42,812 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2022-11-03 02:32:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure imon_find_endpoints [2022-11-03 02:32:42,812 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_find_endpoints [2022-11-03 02:32:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2022-11-03 02:32:42,812 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2022-11-03 02:32:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:32:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-03 02:32:42,813 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-03 02:32:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:32:42,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:32:43,650 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:32:43,657 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:32:44,223 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:32:51,140 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:32:52,209 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:32:52,210 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:32:52,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:32:52 BoogieIcfgContainer [2022-11-03 02:32:52,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:32:52,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:32:52,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:32:52,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:32:52,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:32:39" (1/3) ... [2022-11-03 02:32:52,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473683b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:32:52, skipping insertion in model container [2022-11-03 02:32:52,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:42" (2/3) ... [2022-11-03 02:32:52,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473683b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:32:52, skipping insertion in model container [2022-11-03 02:32:52,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:32:52" (3/3) ... [2022-11-03 02:32:52,226 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i [2022-11-03 02:32:52,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:32:52,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:32:52,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:32:52,384 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;@3a31cae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:32:52,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:32:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 865 states, 528 states have (on average 1.3428030303030303) internal successors, (709), 550 states have internal predecessors, (709), 274 states have call successors, (274), 62 states have call predecessors, (274), 61 states have return successors, (267), 266 states have call predecessors, (267), 267 states have call successors, (267) [2022-11-03 02:32:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:32:52,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:52,408 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:52,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1775579812, now seen corresponding path program 1 times [2022-11-03 02:32:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:52,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045240886] [2022-11-03 02:32:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:32:53,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045240886] [2022-11-03 02:32:53,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045240886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:53,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:32:53,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:32:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994876970] [2022-11-03 02:32:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:53,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:32:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:53,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:32:53,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:32:53,515 INFO L87 Difference]: Start difference. First operand has 865 states, 528 states have (on average 1.3428030303030303) internal successors, (709), 550 states have internal predecessors, (709), 274 states have call successors, (274), 62 states have call predecessors, (274), 61 states have return successors, (267), 266 states have call predecessors, (267), 267 states have call successors, (267) 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:32:58,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:59,422 INFO L93 Difference]: Finished difference Result 2490 states and 3688 transitions. [2022-11-03 02:32:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:32:59,436 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 69 [2022-11-03 02:32:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:59,467 INFO L225 Difference]: With dead ends: 2490 [2022-11-03 02:32:59,468 INFO L226 Difference]: Without dead ends: 1626 [2022-11-03 02:32:59,484 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 [2022-11-03 02:32:59,488 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 1135 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2413 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:59,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 2413 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:32:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-11-03 02:32:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1612. [2022-11-03 02:32:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 992 states have (on average 1.3215725806451613) internal successors, (1311), 1013 states have internal predecessors, (1311), 500 states have call successors, (500), 120 states have call predecessors, (500), 119 states have return successors, (493), 490 states have call predecessors, (493), 493 states have call successors, (493) [2022-11-03 02:32:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2304 transitions. [2022-11-03 02:32:59,720 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2304 transitions. Word has length 69 [2022-11-03 02:32:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:59,725 INFO L495 AbstractCegarLoop]: Abstraction has 1612 states and 2304 transitions. [2022-11-03 02:32:59,726 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:32:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2304 transitions. [2022-11-03 02:32:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:32:59,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:59,739 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:32:59,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash 312671162, now seen corresponding path program 1 times [2022-11-03 02:32:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:59,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132416913] [2022-11-03 02:32:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:59,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:33:00,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:00,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132416913] [2022-11-03 02:33:00,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132416913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:00,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:00,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857503133] [2022-11-03 02:33:00,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:00,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:00,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:00,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:00,380 INFO L87 Difference]: Start difference. First operand 1612 states and 2304 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:33:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:05,588 INFO L93 Difference]: Finished difference Result 4754 states and 6788 transitions. [2022-11-03 02:33:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:05,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 68 [2022-11-03 02:33:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:05,637 INFO L225 Difference]: With dead ends: 4754 [2022-11-03 02:33:05,637 INFO L226 Difference]: Without dead ends: 3162 [2022-11-03 02:33:05,646 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 [2022-11-03 02:33:05,648 INFO L413 NwaCegarLoop]: 1413 mSDtfsCounter, 1149 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 2499 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:05,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 2499 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 02:33:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-11-03 02:33:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3156. [2022-11-03 02:33:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 1949 states have (on average 1.3206772703950744) internal successors, (2574), 1984 states have internal predecessors, (2574), 968 states have call successors, (968), 239 states have call predecessors, (968), 238 states have return successors, (961), 956 states have call predecessors, (961), 961 states have call successors, (961) [2022-11-03 02:33:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 4503 transitions. [2022-11-03 02:33:05,922 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 4503 transitions. Word has length 68 [2022-11-03 02:33:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:05,925 INFO L495 AbstractCegarLoop]: Abstraction has 3156 states and 4503 transitions. [2022-11-03 02:33:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:33:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 4503 transitions. [2022-11-03 02:33:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:33:05,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:05,930 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:05,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:33:05,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash -717282264, now seen corresponding path program 1 times [2022-11-03 02:33:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:05,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334811762] [2022-11-03 02:33:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:33:06,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334811762] [2022-11-03 02:33:06,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334811762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:06,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:06,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775597918] [2022-11-03 02:33:06,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:06,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:06,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:06,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:06,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:06,348 INFO L87 Difference]: Start difference. First operand 3156 states and 4503 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:33:07,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:10,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:11,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:14,547 INFO L93 Difference]: Finished difference Result 7863 states and 11201 transitions. [2022-11-03 02:33:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 70 [2022-11-03 02:33:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:14,595 INFO L225 Difference]: With dead ends: 7863 [2022-11-03 02:33:14,595 INFO L226 Difference]: Without dead ends: 4727 [2022-11-03 02:33:14,612 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 [2022-11-03 02:33:14,614 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 642 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:14,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 2347 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-03 02:33:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2022-11-03 02:33:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4712. [2022-11-03 02:33:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4712 states, 2961 states have (on average 1.3350219520432287) internal successors, (3953), 2996 states have internal predecessors, (3953), 1381 states have call successors, (1381), 370 states have call predecessors, (1381), 369 states have return successors, (1374), 1369 states have call predecessors, (1374), 1374 states have call successors, (1374) [2022-11-03 02:33:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4712 states to 4712 states and 6708 transitions. [2022-11-03 02:33:14,959 INFO L78 Accepts]: Start accepts. Automaton has 4712 states and 6708 transitions. Word has length 70 [2022-11-03 02:33:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:14,960 INFO L495 AbstractCegarLoop]: Abstraction has 4712 states and 6708 transitions. [2022-11-03 02:33:14,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:33:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4712 states and 6708 transitions. [2022-11-03 02:33:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:33:14,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:14,965 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:14,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:33:14,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:14,966 INFO L85 PathProgramCache]: Analyzing trace with hash -381088744, now seen corresponding path program 1 times [2022-11-03 02:33:14,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:14,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673848269] [2022-11-03 02:33:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:14,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:33:15,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:15,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673848269] [2022-11-03 02:33:15,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673848269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:15,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:15,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:15,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130740263] [2022-11-03 02:33:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:15,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:15,315 INFO L87 Difference]: Start difference. First operand 4712 states and 6708 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:33:19,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:21,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:22,241 INFO L93 Difference]: Finished difference Result 13381 states and 19007 transitions. [2022-11-03 02:33:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:22,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 75 [2022-11-03 02:33:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:22,308 INFO L225 Difference]: With dead ends: 13381 [2022-11-03 02:33:22,309 INFO L226 Difference]: Without dead ends: 8695 [2022-11-03 02:33:22,333 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 [2022-11-03 02:33:22,335 INFO L413 NwaCegarLoop]: 1463 mSDtfsCounter, 1121 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:22,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 2515 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-03 02:33:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8695 states. [2022-11-03 02:33:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8695 to 8682. [2022-11-03 02:33:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8682 states, 5465 states have (on average 1.3319304666056724) internal successors, (7279), 5528 states have internal predecessors, (7279), 2521 states have call successors, (2521), 696 states have call predecessors, (2521), 695 states have return successors, (2514), 2505 states have call predecessors, (2514), 2514 states have call successors, (2514) [2022-11-03 02:33:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 12314 transitions. [2022-11-03 02:33:22,947 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 12314 transitions. Word has length 75 [2022-11-03 02:33:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:22,947 INFO L495 AbstractCegarLoop]: Abstraction has 8682 states and 12314 transitions. [2022-11-03 02:33:22,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:33:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 12314 transitions. [2022-11-03 02:33:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:33:22,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:22,950 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:22,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:33:22,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash 188749903, now seen corresponding path program 1 times [2022-11-03 02:33:22,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:22,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815005629] [2022-11-03 02:33:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:22,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 02:33:23,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:23,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815005629] [2022-11-03 02:33:23,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815005629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:23,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:23,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931754225] [2022-11-03 02:33:23,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:23,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:23,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:23,315 INFO L87 Difference]: Start difference. First operand 8682 states and 12314 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:33:24,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:30,350 INFO L93 Difference]: Finished difference Result 9682 states and 13399 transitions. [2022-11-03 02:33:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:30,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 76 [2022-11-03 02:33:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:30,405 INFO L225 Difference]: With dead ends: 9682 [2022-11-03 02:33:30,405 INFO L226 Difference]: Without dead ends: 9678 [2022-11-03 02:33:30,412 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 [2022-11-03 02:33:30,413 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 729 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:30,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1654 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 02:33:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9678 states. [2022-11-03 02:33:30,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9678 to 9674. [2022-11-03 02:33:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9674 states, 6044 states have (on average 1.3165122435473195) internal successors, (7957), 6105 states have internal predecessors, (7957), 2713 states have call successors, (2713), 917 states have call predecessors, (2713), 916 states have return successors, (2708), 2699 states have call predecessors, (2708), 2708 states have call successors, (2708) [2022-11-03 02:33:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 13378 transitions. [2022-11-03 02:33:31,052 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 13378 transitions. Word has length 76 [2022-11-03 02:33:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:31,052 INFO L495 AbstractCegarLoop]: Abstraction has 9674 states and 13378 transitions. [2022-11-03 02:33:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:33:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 13378 transitions. [2022-11-03 02:33:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:33:31,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:31,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:31,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:33:31,055 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1555753738, now seen corresponding path program 1 times [2022-11-03 02:33:31,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:31,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488699965] [2022-11-03 02:33:31,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:31,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 02:33:31,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488699965] [2022-11-03 02:33:31,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488699965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:31,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:31,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:31,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772002247] [2022-11-03 02:33:31,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:31,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:31,454 INFO L87 Difference]: Start difference. First operand 9674 states and 13378 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:33:35,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:38,700 INFO L93 Difference]: Finished difference Result 23674 states and 32664 transitions. [2022-11-03 02:33:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:38,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 77 [2022-11-03 02:33:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:38,780 INFO L225 Difference]: With dead ends: 23674 [2022-11-03 02:33:38,780 INFO L226 Difference]: Without dead ends: 14028 [2022-11-03 02:33:38,819 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 [2022-11-03 02:33:38,820 INFO L413 NwaCegarLoop]: 1252 mSDtfsCounter, 692 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:38,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 2217 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 02:33:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14028 states. [2022-11-03 02:33:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14028 to 13910. [2022-11-03 02:33:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13910 states, 8827 states have (on average 1.3244590461085306) internal successors, (11691), 9019 states have internal predecessors, (11691), 3687 states have call successors, (3687), 1435 states have call predecessors, (3687), 1395 states have return successors, (3744), 3519 states have call predecessors, (3744), 3680 states have call successors, (3744) [2022-11-03 02:33:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13910 states to 13910 states and 19122 transitions. [2022-11-03 02:33:39,771 INFO L78 Accepts]: Start accepts. Automaton has 13910 states and 19122 transitions. Word has length 77 [2022-11-03 02:33:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:39,771 INFO L495 AbstractCegarLoop]: Abstraction has 13910 states and 19122 transitions. [2022-11-03 02:33:39,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:33:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 13910 states and 19122 transitions. [2022-11-03 02:33:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 02:33:39,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:39,773 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:39,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:33:39,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash 983204530, now seen corresponding path program 1 times [2022-11-03 02:33:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564048057] [2022-11-03 02:33:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 02:33:40,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564048057] [2022-11-03 02:33:40,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564048057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:40,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:40,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:40,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760868290] [2022-11-03 02:33:40,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:40,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:40,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:40,114 INFO L87 Difference]: Start difference. First operand 13910 states and 19122 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:33:42,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:44,355 INFO L93 Difference]: Finished difference Result 13912 states and 19123 transitions. [2022-11-03 02:33:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:44,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 78 [2022-11-03 02:33:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:44,428 INFO L225 Difference]: With dead ends: 13912 [2022-11-03 02:33:44,429 INFO L226 Difference]: Without dead ends: 13905 [2022-11-03 02:33:44,436 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 [2022-11-03 02:33:44,437 INFO L413 NwaCegarLoop]: 1096 mSDtfsCounter, 1174 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:44,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1174 Valid, 1128 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:33:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13905 states. [2022-11-03 02:33:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13905 to 13905. [2022-11-03 02:33:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13905 states, 8823 states have (on average 1.323132721296611) internal successors, (11674), 9014 states have internal predecessors, (11674), 3686 states have call successors, (3686), 1435 states have call predecessors, (3686), 1395 states have return successors, (3744), 3519 states have call predecessors, (3744), 3680 states have call successors, (3744) [2022-11-03 02:33:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13905 states to 13905 states and 19104 transitions. [2022-11-03 02:33:45,414 INFO L78 Accepts]: Start accepts. Automaton has 13905 states and 19104 transitions. Word has length 78 [2022-11-03 02:33:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:45,414 INFO L495 AbstractCegarLoop]: Abstraction has 13905 states and 19104 transitions. [2022-11-03 02:33:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:33:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 13905 states and 19104 transitions. [2022-11-03 02:33:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:33:45,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:45,418 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:45,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:33:45,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:45,419 INFO L85 PathProgramCache]: Analyzing trace with hash -173351195, now seen corresponding path program 1 times [2022-11-03 02:33:45,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:45,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102656779] [2022-11-03 02:33:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:45,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:33:45,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:45,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102656779] [2022-11-03 02:33:45,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102656779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:45,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:45,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:45,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292506662] [2022-11-03 02:33:45,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:45,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:45,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:45,742 INFO L87 Difference]: Start difference. First operand 13905 states and 19104 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:33:47,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:53,050 INFO L93 Difference]: Finished difference Result 40629 states and 55554 transitions. [2022-11-03 02:33:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:53,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 91 [2022-11-03 02:33:53,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:53,184 INFO L225 Difference]: With dead ends: 40629 [2022-11-03 02:33:53,185 INFO L226 Difference]: Without dead ends: 26752 [2022-11-03 02:33:53,236 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 [2022-11-03 02:33:53,237 INFO L413 NwaCegarLoop]: 1512 mSDtfsCounter, 1118 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:53,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 2566 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 02:33:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26752 states. [2022-11-03 02:33:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26752 to 26725. [2022-11-03 02:33:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26725 states, 16867 states have (on average 1.3141637517045117) internal successors, (22166), 17216 states have internal predecessors, (22166), 7070 states have call successors, (7070), 2865 states have call predecessors, (7070), 2787 states have return successors, (7192), 6771 states have call predecessors, (7192), 7064 states have call successors, (7192) [2022-11-03 02:33:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26725 states to 26725 states and 36428 transitions. [2022-11-03 02:33:55,098 INFO L78 Accepts]: Start accepts. Automaton has 26725 states and 36428 transitions. Word has length 91 [2022-11-03 02:33:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:55,099 INFO L495 AbstractCegarLoop]: Abstraction has 26725 states and 36428 transitions. [2022-11-03 02:33:55,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:33:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 26725 states and 36428 transitions. [2022-11-03 02:33:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 02:33:55,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:55,101 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:55,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:33:55,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:55,103 INFO L85 PathProgramCache]: Analyzing trace with hash -68689579, now seen corresponding path program 1 times [2022-11-03 02:33:55,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:55,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2225344] [2022-11-03 02:33:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:55,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:33:55,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2225344] [2022-11-03 02:33:55,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2225344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:55,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:55,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:33:55,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928381825] [2022-11-03 02:33:55,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:55,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:33:55,434 INFO L87 Difference]: Start difference. First operand 26725 states and 36428 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:33:56,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:33:59,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:04,774 INFO L93 Difference]: Finished difference Result 77629 states and 105502 transitions. [2022-11-03 02:34:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2022-11-03 02:34:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:05,104 INFO L225 Difference]: With dead ends: 77629 [2022-11-03 02:34:05,104 INFO L226 Difference]: Without dead ends: 50932 [2022-11-03 02:34:05,391 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 [2022-11-03 02:34:05,395 INFO L413 NwaCegarLoop]: 1602 mSDtfsCounter, 1115 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2656 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:05,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2656 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 02:34:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50932 states. [2022-11-03 02:34:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50932 to 50901. [2022-11-03 02:34:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50901 states, 32041 states have (on average 1.3097593708061546) internal successors, (41966), 32678 states have internal predecessors, (41966), 13400 states have call successors, (13400), 5609 states have call predecessors, (13400), 5459 states have return successors, (13650), 12869 states have call predecessors, (13650), 13394 states have call successors, (13650) [2022-11-03 02:34:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50901 states to 50901 states and 69016 transitions. [2022-11-03 02:34:08,630 INFO L78 Accepts]: Start accepts. Automaton has 50901 states and 69016 transitions. Word has length 93 [2022-11-03 02:34:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:08,630 INFO L495 AbstractCegarLoop]: Abstraction has 50901 states and 69016 transitions. [2022-11-03 02:34:08,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:34:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 50901 states and 69016 transitions. [2022-11-03 02:34:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 02:34:08,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:08,639 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:34:08,640 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1636860337, now seen corresponding path program 1 times [2022-11-03 02:34:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:08,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521645906] [2022-11-03 02:34:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-03 02:34:09,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:09,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521645906] [2022-11-03 02:34:09,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521645906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:09,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:09,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:09,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355057799] [2022-11-03 02:34:09,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:09,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:09,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:09,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:09,372 INFO L87 Difference]: Start difference. First operand 50901 states and 69016 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:34:10,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:14,975 INFO L93 Difference]: Finished difference Result 76743 states and 104066 transitions. [2022-11-03 02:34:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 143 [2022-11-03 02:34:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:15,135 INFO L225 Difference]: With dead ends: 76743 [2022-11-03 02:34:15,135 INFO L226 Difference]: Without dead ends: 25870 [2022-11-03 02:34:15,265 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 [2022-11-03 02:34:15,266 INFO L413 NwaCegarLoop]: 1087 mSDtfsCounter, 1212 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:15,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 1092 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 02:34:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25870 states. [2022-11-03 02:34:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25870 to 25672. [2022-11-03 02:34:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25672 states, 16158 states have (on average 1.3123530139868795) internal successors, (21205), 16485 states have internal predecessors, (21205), 6754 states have call successors, (6754), 2835 states have call predecessors, (6754), 2759 states have return successors, (6876), 6479 states have call predecessors, (6876), 6748 states have call successors, (6876) [2022-11-03 02:34:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25672 states to 25672 states and 34835 transitions. [2022-11-03 02:34:17,043 INFO L78 Accepts]: Start accepts. Automaton has 25672 states and 34835 transitions. Word has length 143 [2022-11-03 02:34:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:17,043 INFO L495 AbstractCegarLoop]: Abstraction has 25672 states and 34835 transitions. [2022-11-03 02:34:17,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:34:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 25672 states and 34835 transitions. [2022-11-03 02:34:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:34:17,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:17,050 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 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] [2022-11-03 02:34:17,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:34:17,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1450962761, now seen corresponding path program 1 times [2022-11-03 02:34:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:17,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147619485] [2022-11-03 02:34:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:17,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2022-11-03 02:34:17,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147619485] [2022-11-03 02:34:17,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147619485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:17,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:17,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:17,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304638380] [2022-11-03 02:34:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:17,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:17,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:17,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:17,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:17,749 INFO L87 Difference]: Start difference. First operand 25672 states and 34835 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:34:18,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:21,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:24,905 INFO L93 Difference]: Finished difference Result 51272 states and 69573 transitions. [2022-11-03 02:34:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 145 [2022-11-03 02:34:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:25,018 INFO L225 Difference]: With dead ends: 51272 [2022-11-03 02:34:25,018 INFO L226 Difference]: Without dead ends: 25675 [2022-11-03 02:34:25,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:25,086 INFO L413 NwaCegarLoop]: 1524 mSDtfsCounter, 1032 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:25,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 2165 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:34:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25675 states. [2022-11-03 02:34:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25675 to 25302. [2022-11-03 02:34:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25302 states, 15999 states have (on average 1.3082067629226826) internal successors, (20930), 16217 states have internal predecessors, (20930), 6558 states have call successors, (6558), 2763 states have call predecessors, (6558), 2744 states have return successors, (6509), 6449 states have call predecessors, (6509), 6509 states have call successors, (6509) [2022-11-03 02:34:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25302 states to 25302 states and 33997 transitions. [2022-11-03 02:34:26,458 INFO L78 Accepts]: Start accepts. Automaton has 25302 states and 33997 transitions. Word has length 145 [2022-11-03 02:34:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:26,459 INFO L495 AbstractCegarLoop]: Abstraction has 25302 states and 33997 transitions. [2022-11-03 02:34:26,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:34:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25302 states and 33997 transitions. [2022-11-03 02:34:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 02:34:26,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:26,475 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 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] [2022-11-03 02:34:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:34:26,475 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -218697146, now seen corresponding path program 1 times [2022-11-03 02:34:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914162028] [2022-11-03 02:34:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2022-11-03 02:34:27,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:27,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914162028] [2022-11-03 02:34:27,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914162028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:27,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:27,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357772077] [2022-11-03 02:34:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:27,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:27,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:27,169 INFO L87 Difference]: Start difference. First operand 25302 states and 33997 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:34:31,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:35,310 INFO L93 Difference]: Finished difference Result 25312 states and 34005 transitions. [2022-11-03 02:34:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 159 [2022-11-03 02:34:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:35,414 INFO L225 Difference]: With dead ends: 25312 [2022-11-03 02:34:35,415 INFO L226 Difference]: Without dead ends: 25309 [2022-11-03 02:34:35,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:35,427 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 561 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:35,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1860 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 02:34:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25309 states. [2022-11-03 02:34:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25309 to 25301. [2022-11-03 02:34:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25301 states, 15999 states have (on average 1.30470654415901) internal successors, (20874), 16216 states have internal predecessors, (20874), 6557 states have call successors, (6557), 2763 states have call predecessors, (6557), 2744 states have return successors, (6509), 6449 states have call predecessors, (6509), 6509 states have call successors, (6509) [2022-11-03 02:34:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25301 states to 25301 states and 33940 transitions. [2022-11-03 02:34:36,758 INFO L78 Accepts]: Start accepts. Automaton has 25301 states and 33940 transitions. Word has length 159 [2022-11-03 02:34:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:36,761 INFO L495 AbstractCegarLoop]: Abstraction has 25301 states and 33940 transitions. [2022-11-03 02:34:36,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:34:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 25301 states and 33940 transitions. [2022-11-03 02:34:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-03 02:34:36,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:36,825 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:36,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:34:36,826 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:36,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1502459358, now seen corresponding path program 1 times [2022-11-03 02:34:36,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:36,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849564852] [2022-11-03 02:34:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:36,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-03 02:34:38,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849564852] [2022-11-03 02:34:38,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849564852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:38,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:38,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772712215] [2022-11-03 02:34:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:38,113 INFO L87 Difference]: Start difference. First operand 25301 states and 33940 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:34:39,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:43,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:45,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:50,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:54,361 INFO L93 Difference]: Finished difference Result 67279 states and 94641 transitions. [2022-11-03 02:34:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:54,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 203 [2022-11-03 02:34:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:54,591 INFO L225 Difference]: With dead ends: 67279 [2022-11-03 02:34:54,591 INFO L226 Difference]: Without dead ends: 42053 [2022-11-03 02:34:54,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:34:54,700 INFO L413 NwaCegarLoop]: 1703 mSDtfsCounter, 947 mSDsluCounter, 2842 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 212 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 4274 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:54,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 4274 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 468 Invalid, 1 Unknown, 0 Unchecked, 13.6s Time] [2022-11-03 02:34:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42053 states. [2022-11-03 02:34:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42053 to 25333. [2022-11-03 02:34:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25333 states, 16031 states have (on average 1.3031002432786476) internal successors, (20890), 16248 states have internal predecessors, (20890), 6557 states have call successors, (6557), 2763 states have call predecessors, (6557), 2744 states have return successors, (6509), 6449 states have call predecessors, (6509), 6509 states have call successors, (6509) [2022-11-03 02:34:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25333 states to 25333 states and 33956 transitions. [2022-11-03 02:34:57,235 INFO L78 Accepts]: Start accepts. Automaton has 25333 states and 33956 transitions. Word has length 203 [2022-11-03 02:34:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:57,236 INFO L495 AbstractCegarLoop]: Abstraction has 25333 states and 33956 transitions. [2022-11-03 02:34:57,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:34:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 25333 states and 33956 transitions. [2022-11-03 02:34:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-03 02:34:57,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:57,316 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:57,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:34:57,316 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1739745875, now seen corresponding path program 1 times [2022-11-03 02:34:57,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:57,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433963999] [2022-11-03 02:34:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-03 02:34:57,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433963999] [2022-11-03 02:34:57,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433963999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:57,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:57,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:57,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082112355] [2022-11-03 02:34:57,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:57,789 INFO L87 Difference]: Start difference. First operand 25333 states and 33956 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:34:58,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:02,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []