./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9 --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 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d --- 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-6b4ec56 [2022-11-20 21:20:42,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:20:42,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:20:42,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:20:42,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:20:42,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:20:42,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:20:42,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:20:42,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:20:42,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:20:42,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:20:42,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:20:42,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:20:42,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:20:42,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:20:42,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:20:42,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:20:42,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:20:42,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:20:42,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:20:42,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:20:42,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:20:42,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:20:42,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:20:42,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:20:42,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:20:42,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:20:42,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:20:42,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:20:42,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:20:42,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:20:42,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:20:42,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:20:42,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:20:42,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:20:42,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:20:42,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:20:42,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:20:42,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:20:42,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:20:42,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:20:42,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 21:20:42,564 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:20:42,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:20:42,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:20:42,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:20:42,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:20:42,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:20:42,567 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:20:42,567 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:20:42,567 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:20:42,567 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:20:42,568 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:20:42,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:20:42,569 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:20:42,569 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:20:42,569 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:20:42,570 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:20:42,570 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:20:42,570 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:20:42,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:20:42,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:20:42,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:20:42,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:20:42,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:20:42,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:20:42,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:20:42,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:20:42,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:20:42,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:20:42,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:20:42,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:20:42,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:20:42,574 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:20:42,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:20:42,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:20:42,575 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:20:42,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:20:42,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:20:42,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:20:42,576 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_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d [2022-11-20 21:20:42,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:20:42,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:20:42,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:20:42,868 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:20:42,868 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:20:42,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-20 21:20:45,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:20:46,606 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:20:46,607 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-20 21:20:46,655 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/data/9e48e9d76/f59234a155594e23a94b77d5155575f7/FLAG13f77ba3c [2022-11-20 21:20:46,672 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/data/9e48e9d76/f59234a155594e23a94b77d5155575f7 [2022-11-20 21:20:46,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:20:46,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:20:46,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:20:46,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:20:46,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:20:46,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:20:46" (1/1) ... [2022-11-20 21:20:46,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eff1120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:46, skipping insertion in model container [2022-11-20 21:20:46,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:20:46" (1/1) ... [2022-11-20 21:20:46,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:20:46,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:20:48,474 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2022-11-20 21:20:48,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:20:48,683 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:20:49,094 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2022-11-20 21:20:49,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:20:49,214 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:20:49,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49 WrapperNode [2022-11-20 21:20:49,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:20:49,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:20:49,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:20:49,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:20:49,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,509 INFO L138 Inliner]: procedures = 272, calls = 2499, calls flagged for inlining = 116, calls inlined = 95, statements flattened = 4020 [2022-11-20 21:20:49,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:20:49,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:20:49,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:20:49,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:20:49,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:20:49,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:20:49,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:20:49,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:20:49,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:20:49,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:49,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:20:49,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ebccb43-ccc0-47b8-87f9-569e315926b0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:20:49,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-20 21:20:49,845 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-20 21:20:49,845 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-20 21:20:49,845 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-20 21:20:49,846 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-20 21:20:49,846 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-20 21:20:49,846 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-20 21:20:49,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-20 21:20:49,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-20 21:20:49,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-20 21:20:49,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-20 21:20:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-20 21:20:49,847 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-20 21:20:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2022-11-20 21:20:49,847 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2022-11-20 21:20:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-20 21:20:49,848 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-20 21:20:49,848 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2022-11-20 21:20:49,848 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2022-11-20 21:20:49,848 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-20 21:20:49,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-20 21:20:49,848 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2022-11-20 21:20:49,848 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2022-11-20 21:20:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2022-11-20 21:20:49,849 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2022-11-20 21:20:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-20 21:20:49,850 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-20 21:20:49,851 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-20 21:20:49,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-20 21:20:49,852 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2022-11-20 21:20:49,852 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2022-11-20 21:20:49,852 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2022-11-20 21:20:49,852 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2022-11-20 21:20:49,852 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-20 21:20:49,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-20 21:20:49,853 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 21:20:49,853 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 21:20:49,853 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-20 21:20:49,854 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-20 21:20:49,854 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-20 21:20:49,854 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-20 21:20:49,854 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_driver_lock [2022-11-20 21:20:49,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_driver_lock [2022-11-20 21:20:49,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:20:49,854 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2022-11-20 21:20:49,855 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2022-11-20 21:20:49,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:20:49,855 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2022-11-20 21:20:49,855 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2022-11-20 21:20:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-20 21:20:49,860 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-20 21:20:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:20:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 21:20:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-20 21:20:49,862 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-20 21:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-20 21:20:49,862 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-20 21:20:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-20 21:20:49,863 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-20 21:20:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2022-11-20 21:20:49,863 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2022-11-20 21:20:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2022-11-20 21:20:49,863 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2022-11-20 21:20:49,864 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-20 21:20:49,864 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-20 21:20:49,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-20 21:20:49,864 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2022-11-20 21:20:49,864 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2022-11-20 21:20:49,864 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-20 21:20:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-20 21:20:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-20 21:20:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2022-11-20 21:20:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2022-11-20 21:20:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_group [2022-11-20 21:20:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_group [2022-11-20 21:20:49,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:20:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-20 21:20:49,867 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-20 21:20:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2022-11-20 21:20:49,868 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2022-11-20 21:20:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-20 21:20:49,869 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-20 21:20:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure lcd_write [2022-11-20 21:20:49,869 INFO L138 BoogieDeclarations]: Found implementation of procedure lcd_write [2022-11-20 21:20:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-20 21:20:49,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-20 21:20:49,870 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-20 21:20:49,870 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-20 21:20:49,870 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-20 21:20:49,870 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-20 21:20:49,870 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-20 21:20:49,871 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-20 21:20:49,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:20:49,872 INFO L130 BoogieDeclarations]: Found specification of procedure usb_to_input_id [2022-11-20 21:20:49,872 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_to_input_id [2022-11-20 21:20:49,872 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2022-11-20 21:20:49,872 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2022-11-20 21:20:49,872 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2022-11-20 21:20:49,873 INFO L138 BoogieDeclarations]: Found implementation of procedure noop_llseek [2022-11-20 21:20:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-20 21:20:49,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-20 21:20:49,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-20 21:20:49,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-20 21:20:49,874 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2022-11-20 21:20:49,874 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2022-11-20 21:20:49,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:20:49,874 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2022-11-20 21:20:49,875 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2022-11-20 21:20:49,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-20 21:20:49,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-20 21:20:49,876 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2022-11-20 21:20:49,879 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2022-11-20 21:20:49,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-20 21:20:49,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-20 21:20:49,881 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-20 21:20:49,882 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-20 21:20:49,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:20:49,884 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2022-11-20 21:20:49,884 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2022-11-20 21:20:49,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 21:20:49,890 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2022-11-20 21:20:49,891 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2022-11-20 21:20:49,891 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-20 21:20:49,891 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-11-20 21:20:49,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-11-20 21:20:49,891 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2022-11-20 21:20:49,892 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2022-11-20 21:20:49,893 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2022-11-20 21:20:49,893 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2022-11-20 21:20:49,893 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-20 21:20:49,893 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-20 21:20:49,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_driver_lock [2022-11-20 21:20:49,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_driver_lock [2022-11-20 21:20:49,894 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2022-11-20 21:20:49,894 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2022-11-20 21:20:49,894 INFO L130 BoogieDeclarations]: Found specification of procedure imon_find_endpoints [2022-11-20 21:20:49,894 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_find_endpoints [2022-11-20 21:20:49,895 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2022-11-20 21:20:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2022-11-20 21:20:49,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:20:49,895 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-20 21:20:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-20 21:20:49,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:20:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:20:50,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:20:50,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:20:51,376 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-20 21:20:59,574 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:21:00,721 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:21:00,721 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 21:21:00,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:21:00 BoogieIcfgContainer [2022-11-20 21:21:00,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:21:00,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:21:00,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:21:00,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:21:00,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:20:46" (1/3) ... [2022-11-20 21:21:00,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed869b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:21:00, skipping insertion in model container [2022-11-20 21:21:00,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (2/3) ... [2022-11-20 21:21:00,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed869b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:21:00, skipping insertion in model container [2022-11-20 21:21:00,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:21:00" (3/3) ... [2022-11-20 21:21:00,740 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-20 21:21:00,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:21:00,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:21:00,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:21:00,923 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;@32c5ffa2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:21:00,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:21:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 886 states, 541 states have (on average 1.343807763401109) internal successors, (727), 563 states have internal predecessors, (727), 281 states have call successors, (281), 63 states have call predecessors, (281), 62 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) [2022-11-20 21:21:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-20 21:21:00,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:00,968 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:00,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1577376366, now seen corresponding path program 1 times [2022-11-20 21:21:00,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:00,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726808741] [2022-11-20 21:21:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-20 21:21:02,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726808741] [2022-11-20 21:21:02,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726808741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:02,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:02,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:21:02,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640599303] [2022-11-20 21:21:02,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:02,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:02,286 INFO L87 Difference]: Start difference. First operand has 886 states, 541 states have (on average 1.343807763401109) internal successors, (727), 563 states have internal predecessors, (727), 281 states have call successors, (281), 63 states have call predecessors, (281), 62 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:04,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:08,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:10,976 INFO L93 Difference]: Finished difference Result 2513 states and 3728 transitions. [2022-11-20 21:21:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 167 [2022-11-20 21:21:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:11,009 INFO L225 Difference]: With dead ends: 2513 [2022-11-20 21:21:11,009 INFO L226 Difference]: Without dead ends: 1648 [2022-11-20 21:21:11,023 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 [2022-11-20 21:21:11,027 INFO L413 NwaCegarLoop]: 1379 mSDtfsCounter, 1111 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:11,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 2507 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-11-20 21:21:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-11-20 21:21:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1634. [2022-11-20 21:21:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1008 states have (on average 1.3263888888888888) internal successors, (1337), 1029 states have internal predecessors, (1337), 505 states have call successors, (505), 121 states have call predecessors, (505), 120 states have return successors, (498), 495 states have call predecessors, (498), 498 states have call successors, (498) [2022-11-20 21:21:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2340 transitions. [2022-11-20 21:21:11,232 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2340 transitions. Word has length 167 [2022-11-20 21:21:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:11,238 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2340 transitions. [2022-11-20 21:21:11,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2340 transitions. [2022-11-20 21:21:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-20 21:21:11,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:11,252 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:11,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:21:11,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:11,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1639991466, now seen corresponding path program 1 times [2022-11-20 21:21:11,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:11,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574707182] [2022-11-20 21:21:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:11,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-20 21:21:11,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574707182] [2022-11-20 21:21:11,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574707182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:11,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:11,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:21:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689527807] [2022-11-20 21:21:11,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:11,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:11,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:11,953 INFO L87 Difference]: Start difference. First operand 1634 states and 2340 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:12,965 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 [] [2022-11-20 21:21:15,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:17,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:22,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:22,059 INFO L93 Difference]: Finished difference Result 4015 states and 5739 transitions. [2022-11-20 21:21:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 168 [2022-11-20 21:21:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:22,091 INFO L225 Difference]: With dead ends: 4015 [2022-11-20 21:21:22,092 INFO L226 Difference]: Without dead ends: 2421 [2022-11-20 21:21:22,099 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 [2022-11-20 21:21:22,101 INFO L413 NwaCegarLoop]: 1289 mSDtfsCounter, 666 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:22,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 2349 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 263 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2022-11-20 21:21:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-11-20 21:21:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2408. [2022-11-20 21:21:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 1515 states have (on average 1.3425742574257427) internal successors, (2034), 1536 states have internal predecessors, (2034), 707 states have call successors, (707), 186 states have call predecessors, (707), 185 states have return successors, (700), 697 states have call predecessors, (700), 700 states have call successors, (700) [2022-11-20 21:21:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3441 transitions. [2022-11-20 21:21:22,250 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3441 transitions. Word has length 168 [2022-11-20 21:21:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:22,253 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 3441 transitions. [2022-11-20 21:21:22,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3441 transitions. [2022-11-20 21:21:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-20 21:21:22,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:22,256 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:21:22,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 128400792, now seen corresponding path program 1 times [2022-11-20 21:21:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120123256] [2022-11-20 21:21:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-20 21:21:22,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:22,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120123256] [2022-11-20 21:21:22,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120123256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:22,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:22,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:21:22,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591621306] [2022-11-20 21:21:22,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:22,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:22,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:22,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:22,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:22,838 INFO L87 Difference]: Start difference. First operand 2408 states and 3441 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:23,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:25,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:27,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:30,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:32,577 INFO L93 Difference]: Finished difference Result 7087 states and 10129 transitions. [2022-11-20 21:21:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 166 [2022-11-20 21:21:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:32,616 INFO L225 Difference]: With dead ends: 7087 [2022-11-20 21:21:32,617 INFO L226 Difference]: Without dead ends: 4727 [2022-11-20 21:21:32,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:32,632 INFO L413 NwaCegarLoop]: 1444 mSDtfsCounter, 1153 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:32,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 2563 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 265 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-11-20 21:21:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2022-11-20 21:21:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4719. [2022-11-20 21:21:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 2980 states have (on average 1.342281879194631) internal successors, (4000), 3015 states have internal predecessors, (4000), 1371 states have call successors, (1371), 368 states have call predecessors, (1371), 367 states have return successors, (1364), 1359 states have call predecessors, (1364), 1364 states have call successors, (1364) [2022-11-20 21:21:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 6735 transitions. [2022-11-20 21:21:32,878 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 6735 transitions. Word has length 166 [2022-11-20 21:21:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:32,880 INFO L495 AbstractCegarLoop]: Abstraction has 4719 states and 6735 transitions. [2022-11-20 21:21:32,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 6735 transitions. [2022-11-20 21:21:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-20 21:21:32,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:32,885 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:32,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:21:32,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash 856104026, now seen corresponding path program 1 times [2022-11-20 21:21:32,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:32,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705577728] [2022-11-20 21:21:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:32,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-20 21:21:33,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:33,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705577728] [2022-11-20 21:21:33,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705577728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:33,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:33,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:21:33,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840529551] [2022-11-20 21:21:33,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:33,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:33,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:33,371 INFO L87 Difference]: Start difference. First operand 4719 states and 6735 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:35,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:37,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:40,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:41,999 INFO L93 Difference]: Finished difference Result 13389 states and 19074 transitions. [2022-11-20 21:21:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 173 [2022-11-20 21:21:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:42,057 INFO L225 Difference]: With dead ends: 13389 [2022-11-20 21:21:42,057 INFO L226 Difference]: Without dead ends: 8718 [2022-11-20 21:21:42,076 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 [2022-11-20 21:21:42,077 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 1097 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:42,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1097 Valid, 2601 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-11-20 21:21:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8718 states. [2022-11-20 21:21:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8718 to 8705. [2022-11-20 21:21:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 5512 states have (on average 1.3403483309143687) internal successors, (7388), 5575 states have internal predecessors, (7388), 2501 states have call successors, (2501), 692 states have call predecessors, (2501), 691 states have return successors, (2494), 2485 states have call predecessors, (2494), 2494 states have call successors, (2494) [2022-11-20 21:21:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 12383 transitions. [2022-11-20 21:21:42,635 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 12383 transitions. Word has length 173 [2022-11-20 21:21:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:42,636 INFO L495 AbstractCegarLoop]: Abstraction has 8705 states and 12383 transitions. [2022-11-20 21:21:42,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-20 21:21:42,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 12383 transitions. [2022-11-20 21:21:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-20 21:21:42,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:42,640 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:21:42,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1967805095, now seen corresponding path program 1 times [2022-11-20 21:21:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2954190] [2022-11-20 21:21:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-20 21:21:43,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:43,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2954190] [2022-11-20 21:21:43,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2954190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:43,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:43,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:21:43,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798892464] [2022-11-20 21:21:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:43,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:43,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:43,108 INFO L87 Difference]: Start difference. First operand 8705 states and 12383 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 21:21:45,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:47,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:49,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:52,626 INFO L93 Difference]: Finished difference Result 25191 states and 35654 transitions. [2022-11-20 21:21:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 179 [2022-11-20 21:21:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:52,820 INFO L225 Difference]: With dead ends: 25191 [2022-11-20 21:21:52,820 INFO L226 Difference]: Without dead ends: 16534 [2022-11-20 21:21:52,849 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 [2022-11-20 21:21:52,850 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 1094 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:52,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 2667 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 279 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2022-11-20 21:21:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2022-11-20 21:21:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 16519. [2022-11-20 21:21:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16519 states, 10378 states have (on average 1.328772403160532) internal successors, (13790), 10499 states have internal predecessors, (13790), 4761 states have call successors, (4761), 1380 states have call predecessors, (4761), 1379 states have return successors, (4754), 4735 states have call predecessors, (4754), 4754 states have call successors, (4754) [2022-11-20 21:21:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16519 states to 16519 states and 23305 transitions. [2022-11-20 21:21:53,825 INFO L78 Accepts]: Start accepts. Automaton has 16519 states and 23305 transitions. Word has length 179 [2022-11-20 21:21:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:53,826 INFO L495 AbstractCegarLoop]: Abstraction has 16519 states and 23305 transitions. [2022-11-20 21:21:53,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 21:21:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 16519 states and 23305 transitions. [2022-11-20 21:21:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-20 21:21:53,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:53,830 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:53,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:21:53,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2052966241, now seen corresponding path program 1 times [2022-11-20 21:21:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101725823] [2022-11-20 21:21:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-20 21:21:54,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:54,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101725823] [2022-11-20 21:21:54,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101725823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:54,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:54,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:21:54,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880682996] [2022-11-20 21:21:54,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:54,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:54,205 INFO L87 Difference]: Start difference. First operand 16519 states and 23305 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 21:21:56,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:58,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:21:59,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:03,756 INFO L93 Difference]: Finished difference Result 47763 states and 67240 transitions. [2022-11-20 21:22:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:22:03,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 181 [2022-11-20 21:22:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:03,904 INFO L225 Difference]: With dead ends: 47763 [2022-11-20 21:22:03,904 INFO L226 Difference]: Without dead ends: 31292 [2022-11-20 21:22:03,958 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 [2022-11-20 21:22:03,961 INFO L413 NwaCegarLoop]: 1646 mSDtfsCounter, 1099 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:03,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 2766 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-11-20 21:22:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31292 states. [2022-11-20 21:22:05,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31292 to 31275. [2022-11-20 21:22:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31275 states, 19616 states have (on average 1.3266721044045677) internal successors, (26024), 19853 states have internal predecessors, (26024), 8967 states have call successors, (8967), 2692 states have call predecessors, (8967), 2691 states have return successors, (8960), 8921 states have call predecessors, (8960), 8960 states have call successors, (8960) [2022-11-20 21:22:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31275 states to 31275 states and 43951 transitions. [2022-11-20 21:22:05,723 INFO L78 Accepts]: Start accepts. Automaton has 31275 states and 43951 transitions. Word has length 181 [2022-11-20 21:22:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:05,724 INFO L495 AbstractCegarLoop]: Abstraction has 31275 states and 43951 transitions. [2022-11-20 21:22:05,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 21:22:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 31275 states and 43951 transitions. [2022-11-20 21:22:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-20 21:22:05,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:05,894 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:05,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:22:05,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1809039624, now seen corresponding path program 1 times [2022-11-20 21:22:05,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:05,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975605925] [2022-11-20 21:22:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-20 21:22:06,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975605925] [2022-11-20 21:22:06,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975605925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:06,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:22:06,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:22:06,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258660036] [2022-11-20 21:22:06,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:06,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:06,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:06,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:06,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:22:06,325 INFO L87 Difference]: Start difference. First operand 31275 states and 43951 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 21:22:08,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:11,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:14,963 INFO L93 Difference]: Finished difference Result 50251 states and 70447 transitions. [2022-11-20 21:22:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:22:14,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 181 [2022-11-20 21:22:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:15,253 INFO L225 Difference]: With dead ends: 50251 [2022-11-20 21:22:15,254 INFO L226 Difference]: Without dead ends: 50247 [2022-11-20 21:22:15,278 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 [2022-11-20 21:22:15,279 INFO L413 NwaCegarLoop]: 1305 mSDtfsCounter, 747 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:15,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 2320 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-20 21:22:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50247 states. [2022-11-20 21:22:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50247 to 50243. [2022-11-20 21:22:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50243 states, 32032 states have (on average 1.3375686813186813) internal successors, (42845), 32380 states have internal predecessors, (42845), 13773 states have call successors, (13773), 4574 states have call predecessors, (13773), 4437 states have return successors, (13766), 13480 states have call predecessors, (13766), 13766 states have call successors, (13766) [2022-11-20 21:22:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50243 states to 50243 states and 70384 transitions. [2022-11-20 21:22:18,141 INFO L78 Accepts]: Start accepts. Automaton has 50243 states and 70384 transitions. Word has length 181 [2022-11-20 21:22:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:18,142 INFO L495 AbstractCegarLoop]: Abstraction has 50243 states and 70384 transitions. [2022-11-20 21:22:18,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 21:22:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 50243 states and 70384 transitions. [2022-11-20 21:22:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-20 21:22:18,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:18,145 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:18,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:22:18,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash 245252927, now seen corresponding path program 1 times [2022-11-20 21:22:18,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:18,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067310811] [2022-11-20 21:22:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:18,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-20 21:22:18,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:18,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067310811] [2022-11-20 21:22:18,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067310811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:18,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:22:18,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:22:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532795044] [2022-11-20 21:22:18,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:18,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:22:18,550 INFO L87 Difference]: Start difference. First operand 50243 states and 70384 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 21:22:20,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:27,754 INFO L93 Difference]: Finished difference Result 117163 states and 162792 transitions. [2022-11-20 21:22:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:22:27,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2022-11-20 21:22:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:28,153 INFO L225 Difference]: With dead ends: 117163 [2022-11-20 21:22:28,153 INFO L226 Difference]: Without dead ends: 66968 [2022-11-20 21:22:28,339 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 [2022-11-20 21:22:28,341 INFO L413 NwaCegarLoop]: 1282 mSDtfsCounter, 716 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:28,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 2224 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2022-11-20 21:22:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66968 states. [2022-11-20 21:22:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66968 to 66466. [2022-11-20 21:22:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66466 states, 42490 states have (on average 1.3320546010826078) internal successors, (56599), 43241 states have internal predecessors, (56599), 17391 states have call successors, (17391), 6870 states have call predecessors, (17391), 6584 states have return successors, (17638), 16610 states have call predecessors, (17638), 17382 states have call successors, (17638) [2022-11-20 21:22:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66466 states to 66466 states and 91628 transitions. [2022-11-20 21:22:31,886 INFO L78 Accepts]: Start accepts. Automaton has 66466 states and 91628 transitions. Word has length 182 [2022-11-20 21:22:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:31,887 INFO L495 AbstractCegarLoop]: Abstraction has 66466 states and 91628 transitions. [2022-11-20 21:22:31,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 21:22:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 66466 states and 91628 transitions. [2022-11-20 21:22:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-20 21:22:31,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:31,893 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:31,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 21:22:31,894 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash -987489557, now seen corresponding path program 1 times [2022-11-20 21:22:31,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:31,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478155276] [2022-11-20 21:22:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:31,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-20 21:22:32,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:32,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478155276] [2022-11-20 21:22:32,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478155276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:32,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:22:32,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:22:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740784229] [2022-11-20 21:22:32,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:22:32,483 INFO L87 Difference]: Start difference. First operand 66466 states and 91628 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 21:22:33,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:36,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:40,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:43,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:45,429 INFO L93 Difference]: Finished difference Result 132854 states and 183127 transitions. [2022-11-20 21:22:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:22:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 183 [2022-11-20 21:22:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:46,132 INFO L225 Difference]: With dead ends: 132854 [2022-11-20 21:22:46,133 INFO L226 Difference]: Without dead ends: 132847 [2022-11-20 21:22:46,184 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 [2022-11-20 21:22:46,187 INFO L413 NwaCegarLoop]: 1378 mSDtfsCounter, 1198 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:46,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 2451 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2022-11-20 21:22:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132847 states. [2022-11-20 21:22:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132847 to 132793. [2022-11-20 21:22:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132793 states, 84877 states have (on average 1.3314561070725874) internal successors, (113010), 86405 states have internal predecessors, (113010), 34751 states have call successors, (34751), 13734 states have call predecessors, (34751), 13164 states have return successors, (35254), 33165 states have call predecessors, (35254), 34742 states have call successors, (35254) [2022-11-20 21:22:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132793 states to 132793 states and 183015 transitions. [2022-11-20 21:22:53,252 INFO L78 Accepts]: Start accepts. Automaton has 132793 states and 183015 transitions. Word has length 183 [2022-11-20 21:22:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:53,253 INFO L495 AbstractCegarLoop]: Abstraction has 132793 states and 183015 transitions. [2022-11-20 21:22:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 21:22:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 132793 states and 183015 transitions. [2022-11-20 21:22:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-20 21:22:53,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:53,259 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2022-11-20 21:22:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:22:53,259 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1524325652, now seen corresponding path program 1 times [2022-11-20 21:22:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:53,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867333043] [2022-11-20 21:22:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:53,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-11-20 21:22:53,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867333043] [2022-11-20 21:22:53,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867333043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:53,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:22:53,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:22:53,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143222485] [2022-11-20 21:22:53,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:53,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:53,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:53,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:22:53,674 INFO L87 Difference]: Start difference. First operand 132793 states and 183015 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-20 21:22:55,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:22:59,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:23:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:05,500 INFO L93 Difference]: Finished difference Result 200420 states and 276165 transitions. [2022-11-20 21:23:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:23:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 246 [2022-11-20 21:23:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:05,876 INFO L225 Difference]: With dead ends: 200420 [2022-11-20 21:23:05,876 INFO L226 Difference]: Without dead ends: 67659 [2022-11-20 21:23:06,327 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 [2022-11-20 21:23:06,328 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 11 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:06,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2263 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-11-20 21:23:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67659 states. [2022-11-20 21:23:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67659 to 66941. [2022-11-20 21:23:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66941 states, 42720 states have (on average 1.3348782771535581) internal successors, (57026), 43508 states have internal predecessors, (57026), 17536 states have call successors, (17536), 6970 states have call predecessors, (17536), 6684 states have return successors, (17783), 16718 states have call predecessors, (17783), 17527 states have call successors, (17783) [2022-11-20 21:23:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66941 states to 66941 states and 92345 transitions. [2022-11-20 21:23:09,155 INFO L78 Accepts]: Start accepts. Automaton has 66941 states and 92345 transitions. Word has length 246 [2022-11-20 21:23:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:09,156 INFO L495 AbstractCegarLoop]: Abstraction has 66941 states and 92345 transitions. [2022-11-20 21:23:09,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-20 21:23:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 66941 states and 92345 transitions. [2022-11-20 21:23:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-20 21:23:09,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:09,164 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 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] [2022-11-20 21:23:09,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 21:23:09,164 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:23:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1343616537, now seen corresponding path program 1 times [2022-11-20 21:23:09,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:09,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476766330] [2022-11-20 21:23:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:09,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-11-20 21:23:10,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:10,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476766330] [2022-11-20 21:23:10,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476766330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:23:10,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:23:10,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:23:10,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893151275] [2022-11-20 21:23:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:23:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:23:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:23:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:23:10,236 INFO L87 Difference]: Start difference. First operand 66941 states and 92345 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-20 21:23:12,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []