./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.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_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/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_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/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_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/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 e5d904d16bfadec9650eee3419425295e6c215eb7ede78bce460c631a5749a1f --- 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 03:36:46,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:36:46,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:36:46,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:36:46,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:36:46,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:36:46,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:36:46,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:36:46,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:36:46,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:36:46,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:36:46,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:36:46,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:36:46,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:36:46,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:36:46,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:36:46,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:36:46,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:36:46,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:36:46,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:36:46,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:36:46,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:36:46,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:36:46,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:36:46,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:36:46,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:36:46,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:36:46,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:36:46,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:36:46,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:36:46,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:36:46,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:36:46,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:36:46,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:36:46,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:36:46,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:36:46,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:36:46,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:36:46,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:36:46,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:36:46,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:36:46,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:36:46,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:36:46,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:36:46,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:36:46,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:36:46,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:36:46,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:36:46,448 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:36:46,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:36:46,448 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:36:46,448 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:36:46,450 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:36:46,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:36:46,450 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:36:46,450 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:36:46,451 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:36:46,451 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:36:46,451 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:36:46,451 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:36:46,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:36:46,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:36:46,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:36:46,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:36:46,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:36:46,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:36:46,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:36:46,456 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:36:46,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:36:46,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:36:46,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:36:46,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:36:46,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:36:46,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:36:46,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:36:46,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:36:46,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:36:46,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:36:46,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:36:46,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:36:46,459 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_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5d904d16bfadec9650eee3419425295e6c215eb7ede78bce460c631a5749a1f [2022-11-03 03:36:46,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:36:46,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:36:46,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:36:46,780 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:36:46,781 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:36:46,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.ko-entry_point.cil.out.i [2022-11-03 03:36:46,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/data/92dae8169/cd7aeab9bc0648d581109c3aeb7dd98d/FLAGaaafe1536 [2022-11-03 03:36:47,820 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:36:47,822 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.ko-entry_point.cil.out.i [2022-11-03 03:36:47,888 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/data/92dae8169/cd7aeab9bc0648d581109c3aeb7dd98d/FLAGaaafe1536 [2022-11-03 03:36:48,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/data/92dae8169/cd7aeab9bc0648d581109c3aeb7dd98d [2022-11-03 03:36:48,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:36:48,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:36:48,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:36:48,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:36:48,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:36:48,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:36:48" (1/1) ... [2022-11-03 03:36:48,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f69cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:48, skipping insertion in model container [2022-11-03 03:36:48,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:36:48" (1/1) ... [2022-11-03 03:36:48,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:36:48,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:36:49,583 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_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.ko-entry_point.cil.out.i[167966,167979] [2022-11-03 03:36:50,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:36:50,921 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:36:51,107 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_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.ko-entry_point.cil.out.i[167966,167979] [2022-11-03 03:36:51,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:36:51,683 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:36:51,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51 WrapperNode [2022-11-03 03:36:51,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:36:51,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:36:51,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:36:51,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:36:51,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:51,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,121 INFO L138 Inliner]: procedures = 229, calls = 2513, calls flagged for inlining = 116, calls inlined = 110, statements flattened = 6309 [2022-11-03 03:36:52,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:36:52,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:36:52,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:36:52,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:36:52,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:36:52,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:36:52,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:36:52,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:36:52,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (1/1) ... [2022-11-03 03:36:52,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:36:52,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:52,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:36:52,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:36:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-03 03:36:52,679 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-03 03:36:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 03:36:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 03:36:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:36:52,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:36:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2022-11-03 03:36:52,680 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2022-11-03 03:36:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_rx_fixup [2022-11-03 03:36:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_rx_fixup [2022-11-03 03:36:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_tx_fixup [2022-11-03 03:36:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_tx_fixup [2022-11-03 03:36:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_find_endpoints [2022-11-03 03:36:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_find_endpoints [2022-11-03 03:36:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_flags [2022-11-03 03:36:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_flags [2022-11-03 03:36:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:36:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:36:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-03 03:36:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-03 03:36:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-03 03:36:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_bind [2022-11-03 03:36:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_bind [2022-11-03 03:36:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_update_rxtx_max [2022-11-03 03:36:52,684 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_update_rxtx_max [2022-11-03 03:36:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:36:52,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:36:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2022-11-03 03:36:52,685 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2022-11-03 03:36:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-03 03:36:52,685 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-03 03:36:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:36:52,685 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:36:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:36:52,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:36:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure usb_maxpacket [2022-11-03 03:36:52,686 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_maxpacket [2022-11-03 03:36:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_free [2022-11-03 03:36:52,687 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_free [2022-11-03 03:36:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:36:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_eth_hlen [2022-11-03 03:36:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_eth_hlen [2022-11-03 03:36:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 03:36:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 03:36:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:36:52,689 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_link_change [2022-11-03 03:36:52,689 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_link_change [2022-11-03 03:36:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure hrtimer_active [2022-11-03 03:36:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure hrtimer_active [2022-11-03 03:36:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2022-11-03 03:36:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2022-11-03 03:36:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2022-11-03 03:36:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:36:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:36:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 03:36:52,692 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 03:36:52,693 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 03:36:52,693 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 03:36:52,693 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 03:36:52,694 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 03:36:52,694 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 03:36:52,695 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 03:36:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-03 03:36:52,695 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-03 03:36:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_manage_power [2022-11-03 03:36:52,696 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_manage_power [2022-11-03 03:36:52,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 03:36:52,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 03:36:52,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 03:36:52,696 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2022-11-03 03:36:52,697 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2022-11-03 03:36:52,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:36:52,698 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_check_rx_max [2022-11-03 03:36:52,698 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_check_rx_max [2022-11-03 03:36:52,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:36:52,698 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2022-11-03 03:36:52,699 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2022-11-03 03:36:52,699 INFO L130 BoogieDeclarations]: Found specification of procedure usb_driver_release_interface [2022-11-03 03:36:52,699 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_driver_release_interface [2022-11-03 03:36:52,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 03:36:52,699 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 03:36:52,700 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd [2022-11-03 03:36:52,700 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_write_cmd [2022-11-03 03:36:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 03:36:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 03:36:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_lock_bh [2022-11-03 03:36:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_lock_bh [2022-11-03 03:36:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_unlock_bh [2022-11-03 03:36:52,702 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_unlock_bh [2022-11-03 03:36:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:36:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_status [2022-11-03 03:36:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_status [2022-11-03 03:36:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:36:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:36:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd [2022-11-03 03:36:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_read_cmd [2022-11-03 03:36:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:36:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-03 03:36:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-03 03:36:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:36:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:36:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 03:36:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_speed_change [2022-11-03 03:36:52,707 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_speed_change [2022-11-03 03:36:52,707 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_align_tail [2022-11-03 03:36:52,707 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_align_tail [2022-11-03 03:36:52,707 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2022-11-03 03:36:52,708 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2022-11-03 03:36:52,708 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_start_xmit [2022-11-03 03:36:52,709 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_start_xmit [2022-11-03 03:36:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_check_tx_max [2022-11-03 03:36:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_check_tx_max [2022-11-03 03:36:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 03:36:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 03:36:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-03 03:36:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-03 03:36:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 03:36:52,716 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 03:36:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure driver_of [2022-11-03 03:36:52,716 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_of [2022-11-03 03:36:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_tx_timeout_start [2022-11-03 03:36:52,723 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_tx_timeout_start [2022-11-03 03:36:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 03:36:52,724 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 03:36:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_unbind [2022-11-03 03:36:52,724 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_unbind [2022-11-03 03:36:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:36:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:36:52,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:36:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-03 03:36:52,725 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-03 03:36:53,806 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:36:53,810 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:36:54,043 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:38:51,294 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:38:54,110 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:38:54,111 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:38:54,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:38:54 BoogieIcfgContainer [2022-11-03 03:38:54,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:38:54,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:38:54,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:38:54,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:38:54,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:36:48" (1/3) ... [2022-11-03 03:38:54,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6331b183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:38:54, skipping insertion in model container [2022-11-03 03:38:54,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:36:51" (2/3) ... [2022-11-03 03:38:54,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6331b183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:38:54, skipping insertion in model container [2022-11-03 03:38:54,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:38:54" (3/3) ... [2022-11-03 03:38:54,129 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.ko-entry_point.cil.out.i [2022-11-03 03:38:54,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:38:54,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:38:54,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:38:54,289 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;@3098271a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:38:54,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:38:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 1086 states, 732 states have (on average 1.4262295081967213) internal successors, (1044), 762 states have internal predecessors, (1044), 297 states have call successors, (297), 56 states have call predecessors, (297), 55 states have return successors, (276), 275 states have call predecessors, (276), 276 states have call successors, (276) [2022-11-03 03:38:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-03 03:38:54,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:54,353 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:38:54,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1148544982, now seen corresponding path program 1 times [2022-11-03 03:38:54,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:54,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958285215] [2022-11-03 03:38:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4342 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4342 trivial. 0 not checked. [2022-11-03 03:38:56,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:56,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958285215] [2022-11-03 03:38:56,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958285215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:56,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:56,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:38:56,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149912347] [2022-11-03 03:38:56,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:56,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:38:56,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:56,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:38:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:38:56,861 INFO L87 Difference]: Start difference. First operand has 1086 states, 732 states have (on average 1.4262295081967213) internal successors, (1044), 762 states have internal predecessors, (1044), 297 states have call successors, (297), 56 states have call predecessors, (297), 55 states have return successors, (276), 275 states have call predecessors, (276), 276 states have call successors, (276) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2022-11-03 03:38:59,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:03,322 INFO L93 Difference]: Finished difference Result 3001 states and 4485 transitions. [2022-11-03 03:39:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 318 [2022-11-03 03:39:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:03,366 INFO L225 Difference]: With dead ends: 3001 [2022-11-03 03:39:03,367 INFO L226 Difference]: Without dead ends: 1972 [2022-11-03 03:39:03,387 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 03:39:03,399 INFO L413 NwaCegarLoop]: 1630 mSDtfsCounter, 1382 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:03,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1382 Valid, 3040 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 393 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-03 03:39:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2022-11-03 03:39:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1972. [2022-11-03 03:39:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1383 states have (on average 1.4128705712219811) internal successors, (1954), 1397 states have internal predecessors, (1954), 480 states have call successors, (480), 109 states have call predecessors, (480), 108 states have return successors, (479), 477 states have call predecessors, (479), 479 states have call successors, (479) [2022-11-03 03:39:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2913 transitions. [2022-11-03 03:39:03,631 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2913 transitions. Word has length 318 [2022-11-03 03:39:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:03,637 INFO L495 AbstractCegarLoop]: Abstraction has 1972 states and 2913 transitions. [2022-11-03 03:39:03,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2022-11-03 03:39:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2913 transitions. [2022-11-03 03:39:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-03 03:39:03,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:03,648 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:03,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:39:03,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1090363921, now seen corresponding path program 1 times [2022-11-03 03:39:03,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:03,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047696922] [2022-11-03 03:39:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:03,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4530 trivial. 0 not checked. [2022-11-03 03:39:05,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047696922] [2022-11-03 03:39:05,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047696922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:05,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:05,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:05,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162380865] [2022-11-03 03:39:05,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:05,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:05,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:05,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:05,736 INFO L87 Difference]: Start difference. First operand 1972 states and 2913 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-03 03:39:07,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:14,033 INFO L93 Difference]: Finished difference Result 3841 states and 5686 transitions. [2022-11-03 03:39:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:14,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 326 [2022-11-03 03:39:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:14,065 INFO L225 Difference]: With dead ends: 3841 [2022-11-03 03:39:14,066 INFO L226 Difference]: Without dead ends: 3836 [2022-11-03 03:39:14,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:14,071 INFO L413 NwaCegarLoop]: 1610 mSDtfsCounter, 1400 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 4590 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:14,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 4590 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 580 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-03 03:39:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2022-11-03 03:39:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3834. [2022-11-03 03:39:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 2709 states have (on average 1.4208194905869325) internal successors, (3849), 2737 states have internal predecessors, (3849), 908 states have call successors, (908), 217 states have call predecessors, (908), 216 states have return successors, (921), 903 states have call predecessors, (921), 907 states have call successors, (921) [2022-11-03 03:39:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 5678 transitions. [2022-11-03 03:39:14,296 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 5678 transitions. Word has length 326 [2022-11-03 03:39:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:14,298 INFO L495 AbstractCegarLoop]: Abstraction has 3834 states and 5678 transitions. [2022-11-03 03:39:14,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-03 03:39:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 5678 transitions. [2022-11-03 03:39:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-03 03:39:14,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:14,318 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:14,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:39:14,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash -627583191, now seen corresponding path program 1 times [2022-11-03 03:39:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26201220] [2022-11-03 03:39:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4722 trivial. 0 not checked. [2022-11-03 03:39:15,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:15,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26201220] [2022-11-03 03:39:15,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26201220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:15,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:15,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:15,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609923260] [2022-11-03 03:39:15,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:15,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:15,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:15,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:39:15,342 INFO L87 Difference]: Start difference. First operand 3834 states and 5678 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:39:17,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:22,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:22,413 INFO L93 Difference]: Finished difference Result 11096 states and 16394 transitions. [2022-11-03 03:39:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 381 [2022-11-03 03:39:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:22,472 INFO L225 Difference]: With dead ends: 11096 [2022-11-03 03:39:22,472 INFO L226 Difference]: Without dead ends: 7365 [2022-11-03 03:39:22,504 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 03:39:22,505 INFO L413 NwaCegarLoop]: 1587 mSDtfsCounter, 1301 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:22,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 2932 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 03:39:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7365 states. [2022-11-03 03:39:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7365 to 7358. [2022-11-03 03:39:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7358 states, 5225 states have (on average 1.4233492822966507) internal successors, (7437), 5283 states have internal predecessors, (7437), 1700 states have call successors, (1700), 433 states have call predecessors, (1700), 432 states have return successors, (1723), 1689 states have call predecessors, (1723), 1699 states have call successors, (1723) [2022-11-03 03:39:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 10860 transitions. [2022-11-03 03:39:22,895 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 10860 transitions. Word has length 381 [2022-11-03 03:39:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:22,896 INFO L495 AbstractCegarLoop]: Abstraction has 7358 states and 10860 transitions. [2022-11-03 03:39:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:39:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 10860 transitions. [2022-11-03 03:39:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-03 03:39:22,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:22,909 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:39:22,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1105622656, now seen corresponding path program 1 times [2022-11-03 03:39:22,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:22,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174411087] [2022-11-03 03:39:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:22,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4722 trivial. 0 not checked. [2022-11-03 03:39:24,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:24,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174411087] [2022-11-03 03:39:24,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174411087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:24,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:24,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:24,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369456844] [2022-11-03 03:39:24,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:24,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:39:24,015 INFO L87 Difference]: Start difference. First operand 7358 states and 10860 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:39:26,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:31,080 INFO L93 Difference]: Finished difference Result 21478 states and 31622 transitions. [2022-11-03 03:39:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 387 [2022-11-03 03:39:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:31,196 INFO L225 Difference]: With dead ends: 21478 [2022-11-03 03:39:31,197 INFO L226 Difference]: Without dead ends: 14223 [2022-11-03 03:39:31,243 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 03:39:31,244 INFO L413 NwaCegarLoop]: 1636 mSDtfsCounter, 1280 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:31,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 2981 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-03 03:39:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14223 states. [2022-11-03 03:39:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14223 to 14214. [2022-11-03 03:39:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14214 states, 10125 states have (on average 1.4235061728395062) internal successors, (14413), 10243 states have internal predecessors, (14413), 3224 states have call successors, (3224), 865 states have call predecessors, (3224), 864 states have return successors, (3263), 3201 states have call predecessors, (3263), 3223 states have call successors, (3263) [2022-11-03 03:39:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14214 states to 14214 states and 20900 transitions. [2022-11-03 03:39:32,297 INFO L78 Accepts]: Start accepts. Automaton has 14214 states and 20900 transitions. Word has length 387 [2022-11-03 03:39:32,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:32,299 INFO L495 AbstractCegarLoop]: Abstraction has 14214 states and 20900 transitions. [2022-11-03 03:39:32,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:39:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 14214 states and 20900 transitions. [2022-11-03 03:39:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-03 03:39:32,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:32,320 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:32,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:39:32,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:32,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1685506041, now seen corresponding path program 1 times [2022-11-03 03:39:32,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:32,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781187366] [2022-11-03 03:39:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4727 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4722 trivial. 0 not checked. [2022-11-03 03:39:33,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781187366] [2022-11-03 03:39:33,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781187366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:33,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:33,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:33,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865656439] [2022-11-03 03:39:33,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:33,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:33,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:39:33,511 INFO L87 Difference]: Start difference. First operand 14214 states and 20900 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:39:35,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:41,988 INFO L93 Difference]: Finished difference Result 40038 states and 58782 transitions. [2022-11-03 03:39:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:41,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 374 [2022-11-03 03:39:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:42,345 INFO L225 Difference]: With dead ends: 40038 [2022-11-03 03:39:42,345 INFO L226 Difference]: Without dead ends: 25927 [2022-11-03 03:39:42,406 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 03:39:42,407 INFO L413 NwaCegarLoop]: 2116 mSDtfsCounter, 1329 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:42,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 3461 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 519 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-03 03:39:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25927 states. [2022-11-03 03:39:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25927 to 25920. [2022-11-03 03:39:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25920 states, 18525 states have (on average 1.4245074224021592) internal successors, (26389), 18743 states have internal predecessors, (26389), 5782 states have call successors, (5782), 1613 states have call predecessors, (5782), 1612 states have return successors, (5843), 5739 states have call predecessors, (5843), 5781 states have call successors, (5843) [2022-11-03 03:39:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25920 states to 25920 states and 38014 transitions. [2022-11-03 03:39:44,018 INFO L78 Accepts]: Start accepts. Automaton has 25920 states and 38014 transitions. Word has length 374 [2022-11-03 03:39:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:44,022 INFO L495 AbstractCegarLoop]: Abstraction has 25920 states and 38014 transitions. [2022-11-03 03:39:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:39:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 25920 states and 38014 transitions. [2022-11-03 03:39:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-11-03 03:39:44,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:44,088 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:44,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:39:44,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1014513985, now seen corresponding path program 1 times [2022-11-03 03:39:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842452997] [2022-11-03 03:39:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9150 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 9130 trivial. 0 not checked. [2022-11-03 03:39:45,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842452997] [2022-11-03 03:39:45,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842452997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:45,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:45,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24624169] [2022-11-03 03:39:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:45,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:45,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:39:45,328 INFO L87 Difference]: Start difference. First operand 25920 states and 38014 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2022-11-03 03:39:47,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:53,614 INFO L93 Difference]: Finished difference Result 64692 states and 94906 transitions. [2022-11-03 03:39:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) Word has length 500 [2022-11-03 03:39:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:53,834 INFO L225 Difference]: With dead ends: 64692 [2022-11-03 03:39:53,835 INFO L226 Difference]: Without dead ends: 38875 [2022-11-03 03:39:53,926 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 03:39:53,927 INFO L413 NwaCegarLoop]: 2023 mSDtfsCounter, 1366 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:53,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 3345 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 503 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-11-03 03:39:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38875 states. [2022-11-03 03:39:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38875 to 38868. [2022-11-03 03:39:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38868 states, 27887 states have (on average 1.4232796643597374) internal successors, (39691), 28221 states have internal predecessors, (39691), 8544 states have call successors, (8544), 2437 states have call predecessors, (8544), 2436 states have return successors, (8629), 8477 states have call predecessors, (8629), 8543 states have call successors, (8629) [2022-11-03 03:39:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38868 states to 38868 states and 56864 transitions. [2022-11-03 03:39:56,217 INFO L78 Accepts]: Start accepts. Automaton has 38868 states and 56864 transitions. Word has length 500 [2022-11-03 03:39:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:56,218 INFO L495 AbstractCegarLoop]: Abstraction has 38868 states and 56864 transitions. [2022-11-03 03:39:56,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2022-11-03 03:39:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 38868 states and 56864 transitions. [2022-11-03 03:39:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-11-03 03:39:56,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:56,263 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:39:56,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:56,264 INFO L85 PathProgramCache]: Analyzing trace with hash 840147015, now seen corresponding path program 1 times [2022-11-03 03:39:56,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:56,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612920478] [2022-11-03 03:39:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:56,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9156 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9130 trivial. 0 not checked. [2022-11-03 03:39:57,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:57,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612920478] [2022-11-03 03:39:57,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612920478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:57,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:57,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817184298] [2022-11-03 03:39:57,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:57,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:39:57,804 INFO L87 Difference]: Start difference. First operand 38868 states and 56864 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2022-11-03 03:39:59,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:06,089 INFO L93 Difference]: Finished difference Result 96608 states and 141394 transitions. [2022-11-03 03:40:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:40:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) Word has length 507 [2022-11-03 03:40:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:06,515 INFO L225 Difference]: With dead ends: 96608 [2022-11-03 03:40:06,516 INFO L226 Difference]: Without dead ends: 57843 [2022-11-03 03:40:06,664 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 03:40:06,665 INFO L413 NwaCegarLoop]: 2042 mSDtfsCounter, 1345 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:06,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 3346 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 507 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 03:40:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57843 states. [2022-11-03 03:40:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57843 to 57832. [2022-11-03 03:40:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57832 states, 41673 states have (on average 1.4225277757780816) internal successors, (59281), 42179 states have internal predecessors, (59281), 12506 states have call successors, (12506), 3653 states have call predecessors, (12506), 3652 states have return successors, (12623), 12403 states have call predecessors, (12623), 12505 states have call successors, (12623) [2022-11-03 03:40:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57832 states to 57832 states and 84410 transitions. [2022-11-03 03:40:10,161 INFO L78 Accepts]: Start accepts. Automaton has 57832 states and 84410 transitions. Word has length 507 [2022-11-03 03:40:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:10,162 INFO L495 AbstractCegarLoop]: Abstraction has 57832 states and 84410 transitions. [2022-11-03 03:40:10,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2022-11-03 03:40:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 57832 states and 84410 transitions. [2022-11-03 03:40:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-11-03 03:40:10,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:10,197 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:40:10,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:40:10,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash -579465122, now seen corresponding path program 1 times [2022-11-03 03:40:10,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:10,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111735158] [2022-11-03 03:40:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:10,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9156 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9130 trivial. 0 not checked. [2022-11-03 03:40:11,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:11,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111735158] [2022-11-03 03:40:11,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111735158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:11,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:11,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:40:11,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709139539] [2022-11-03 03:40:11,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:11,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:40:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:40:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:40:11,644 INFO L87 Difference]: Start difference. First operand 57832 states and 84410 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2022-11-03 03:40:13,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:21,243 INFO L93 Difference]: Finished difference Result 143112 states and 208972 transitions. [2022-11-03 03:40:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:40:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) Word has length 513 [2022-11-03 03:40:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:21,622 INFO L225 Difference]: With dead ends: 143112 [2022-11-03 03:40:21,623 INFO L226 Difference]: Without dead ends: 85383 [2022-11-03 03:40:21,795 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 03:40:21,796 INFO L413 NwaCegarLoop]: 1960 mSDtfsCounter, 1329 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 3251 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:21,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 3251 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 486 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-03 03:40:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85383 states. [2022-11-03 03:40:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85383 to 85360. [2022-11-03 03:40:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85360 states, 61819 states have (on average 1.4223944094857568) internal successors, (87931), 62579 states have internal predecessors, (87931), 18104 states have call successors, (18104), 5437 states have call predecessors, (18104), 5436 states have return successors, (18263), 17947 states have call predecessors, (18263), 18103 states have call successors, (18263) [2022-11-03 03:40:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85360 states to 85360 states and 124298 transitions. [2022-11-03 03:40:25,878 INFO L78 Accepts]: Start accepts. Automaton has 85360 states and 124298 transitions. Word has length 513 [2022-11-03 03:40:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:25,879 INFO L495 AbstractCegarLoop]: Abstraction has 85360 states and 124298 transitions. [2022-11-03 03:40:25,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 3 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2022-11-03 03:40:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 85360 states and 124298 transitions. [2022-11-03 03:40:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-11-03 03:40:25,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:25,923 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:40:25,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:40:25,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1214408081, now seen corresponding path program 1 times [2022-11-03 03:40:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:25,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964665913] [2022-11-03 03:40:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9156 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 9004 trivial. 0 not checked. [2022-11-03 03:40:29,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964665913] [2022-11-03 03:40:29,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964665913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:29,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:29,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:40:29,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691064848] [2022-11-03 03:40:29,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:29,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:40:29,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:29,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:40:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:29,474 INFO L87 Difference]: Start difference. First operand 85360 states and 124298 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (77), 2 states have call predecessors, (77), 3 states have return successors, (76), 3 states have call predecessors, (76), 2 states have call successors, (76) [2022-11-03 03:40:31,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:42,055 INFO L93 Difference]: Finished difference Result 171249 states and 250005 transitions. [2022-11-03 03:40:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:40:42,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (77), 2 states have call predecessors, (77), 3 states have return successors, (76), 3 states have call predecessors, (76), 2 states have call successors, (76) Word has length 507 [2022-11-03 03:40:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:42,592 INFO L225 Difference]: With dead ends: 171249 [2022-11-03 03:40:42,593 INFO L226 Difference]: Without dead ends: 85992 [2022-11-03 03:40:42,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:42,910 INFO L413 NwaCegarLoop]: 1375 mSDtfsCounter, 2 mSDsluCounter, 4625 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5427 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:42,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5427 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 843 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 03:40:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85992 states. [2022-11-03 03:40:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85992 to 85880. [2022-11-03 03:40:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85880 states, 62183 states have (on average 1.419921843590692) internal successors, (88295), 62995 states have internal predecessors, (88295), 18104 states have call successors, (18104), 5437 states have call predecessors, (18104), 5592 states have return successors, (18764), 18051 states have call predecessors, (18764), 18103 states have call successors, (18764) [2022-11-03 03:40:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85880 states to 85880 states and 125163 transitions. [2022-11-03 03:40:47,614 INFO L78 Accepts]: Start accepts. Automaton has 85880 states and 125163 transitions. Word has length 507 [2022-11-03 03:40:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:47,616 INFO L495 AbstractCegarLoop]: Abstraction has 85880 states and 125163 transitions. [2022-11-03 03:40:47,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (77), 2 states have call predecessors, (77), 3 states have return successors, (76), 3 states have call predecessors, (76), 2 states have call successors, (76) [2022-11-03 03:40:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 85880 states and 125163 transitions. [2022-11-03 03:40:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-11-03 03:40:47,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:47,648 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 67, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:40:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:40:47,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2121828593, now seen corresponding path program 1 times [2022-11-03 03:40:47,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:47,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294789827] [2022-11-03 03:40:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:47,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9150 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 9001 trivial. 0 not checked. [2022-11-03 03:40:51,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:51,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294789827] [2022-11-03 03:40:51,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294789827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:51,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:51,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:40:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871883560] [2022-11-03 03:40:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:51,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:40:51,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:51,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:40:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:40:51,024 INFO L87 Difference]: Start difference. First operand 85880 states and 125163 transitions. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 8 states have internal predecessors, (140), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (77), 5 states have call predecessors, (77), 3 states have call successors, (77) [2022-11-03 03:40:53,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:41:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:11,982 INFO L93 Difference]: Finished difference Result 179049 states and 261907 transitions. [2022-11-03 03:41:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:41:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 8 states have internal predecessors, (140), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (77), 5 states have call predecessors, (77), 3 states have call successors, (77) Word has length 504 [2022-11-03 03:41:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:12,460 INFO L225 Difference]: With dead ends: 179049 [2022-11-03 03:41:12,460 INFO L226 Difference]: Without dead ends: 93272 [2022-11-03 03:41:12,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:41:12,741 INFO L413 NwaCegarLoop]: 1539 mSDtfsCounter, 84 mSDsluCounter, 13636 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 13604 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:12,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 13604 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1993 Invalid, 1 Unknown, 0 Unchecked, 17.8s Time] [2022-11-03 03:41:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93272 states. [2022-11-03 03:41:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93272 to 89728. [2022-11-03 03:41:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89728 states, 64939 states have (on average 1.4165139592540692) internal successors, (91987), 65803 states have internal predecessors, (91987), 19092 states have call successors, (19092), 5437 states have call predecessors, (19092), 5696 states have return successors, (19912), 19143 states have call predecessors, (19912), 19091 states have call successors, (19912) [2022-11-03 03:41:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89728 states to 89728 states and 130991 transitions. [2022-11-03 03:41:17,066 INFO L78 Accepts]: Start accepts. Automaton has 89728 states and 130991 transitions. Word has length 504 [2022-11-03 03:41:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:17,067 INFO L495 AbstractCegarLoop]: Abstraction has 89728 states and 130991 transitions. [2022-11-03 03:41:17,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 8 states have internal predecessors, (140), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (77), 5 states have call predecessors, (77), 3 states have call successors, (77) [2022-11-03 03:41:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 89728 states and 130991 transitions. [2022-11-03 03:41:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-11-03 03:41:17,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:17,097 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 67, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:41:17,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:41:17,098 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:17,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1621548253, now seen corresponding path program 1 times [2022-11-03 03:41:17,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:17,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630007962] [2022-11-03 03:41:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:17,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9150 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9144 trivial. 0 not checked. [2022-11-03 03:41:20,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:20,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630007962] [2022-11-03 03:41:20,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630007962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:20,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857567502] [2022-11-03 03:41:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:20,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:20,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:20,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:20,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80beb84e-02c2-4cb5-8a5b-281e5a5e53a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process