./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/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_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 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-8393723 [2022-11-19 08:04:05,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:04:05,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:04:05,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:04:05,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:04:05,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:04:05,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:04:05,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:04:05,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:04:05,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:04:05,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:04:05,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:04:05,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:04:05,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:04:05,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:04:05,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:04:05,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:04:05,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:04:05,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:04:05,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:04:05,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:04:05,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:04:05,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:04:05,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:04:05,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:04:05,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:04:05,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:04:05,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:04:05,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:04:05,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:04:05,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:04:05,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:04:05,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:04:05,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:04:05,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:04:05,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:04:05,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:04:05,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:04:05,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:04:05,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:04:05,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:04:05,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:04:05,714 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:04:05,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:04:05,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:04:05,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:04:05,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:04:05,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:04:05,716 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:04:05,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:04:05,716 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:04:05,716 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:04:05,717 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:04:05,717 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:04:05,717 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:04:05,717 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:04:05,718 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:04:05,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:04:05,718 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:04:05,718 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:04:05,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:04:05,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:04:05,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:04:05,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:04:05,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:04:05,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:04:05,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:04:05,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:04:05,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:04:05,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:04:05,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:04:05,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:05,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:04:05,722 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:04:05,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:04:05,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:04:05,722 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:04:05,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:04:05,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:04:05,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:04:05,723 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_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d [2022-11-19 08:04:06,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:04:06,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:04:06,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:04:06,068 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:04:06,069 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:04:06,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/../../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 [2022-11-19 08:04:06,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/data/18624bf3d/19f1bdaa54a44df184264e23e48a2029/FLAG85bfa7870 [2022-11-19 08:04:07,004 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:04:07,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/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 [2022-11-19 08:04:07,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/data/18624bf3d/19f1bdaa54a44df184264e23e48a2029/FLAG85bfa7870 [2022-11-19 08:04:07,537 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/data/18624bf3d/19f1bdaa54a44df184264e23e48a2029 [2022-11-19 08:04:07,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:04:07,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:04:07,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:07,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:04:07,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:04:07,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9c0cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07, skipping insertion in model container [2022-11-19 08:04:07,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:04:07,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:04:09,423 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/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] [2022-11-19 08:04:09,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:09,634 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:04:10,002 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/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] [2022-11-19 08:04:10,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:10,118 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:04:10,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10 WrapperNode [2022-11-19 08:04:10,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:10,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:10,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:04:10,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:04:10,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,461 INFO L138 Inliner]: procedures = 272, calls = 2499, calls flagged for inlining = 116, calls inlined = 95, statements flattened = 3982 [2022-11-19 08:04:10,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:10,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:04:10,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:04:10,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:04:10,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,671 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:04:10,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:04:10,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:04:10,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:04:10,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:10,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:04:10,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:04:10,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-19 08:04:10,807 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-19 08:04:10,807 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-19 08:04:10,807 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-19 08:04:10,807 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-19 08:04:10,807 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-19 08:04:10,807 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-19 08:04:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:04:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:04:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:04:10,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:04:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 08:04:10,809 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 08:04:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2022-11-19 08:04:10,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2022-11-19 08:04:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-19 08:04:10,810 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-19 08:04:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2022-11-19 08:04:10,810 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2022-11-19 08:04:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:04:10,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:04:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2022-11-19 08:04:10,811 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2022-11-19 08:04:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2022-11-19 08:04:10,811 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2022-11-19 08:04:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 08:04:10,812 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 08:04:10,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:04:10,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:04:10,812 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2022-11-19 08:04:10,813 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2022-11-19 08:04:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2022-11-19 08:04:10,813 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2022-11-19 08:04:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-19 08:04:10,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-19 08:04:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:04:10,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:04:10,814 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-19 08:04:10,814 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-19 08:04:10,814 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 08:04:10,814 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 08:04:10,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_driver_lock [2022-11-19 08:04:10,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_driver_lock [2022-11-19 08:04:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:04:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2022-11-19 08:04:10,815 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2022-11-19 08:04:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:04:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2022-11-19 08:04:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2022-11-19 08:04:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-19 08:04:10,818 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-19 08:04:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:04:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:04:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 08:04:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 08:04:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 08:04:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 08:04:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-19 08:04:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-19 08:04:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2022-11-19 08:04:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2022-11-19 08:04:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2022-11-19 08:04:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2022-11-19 08:04:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-19 08:04:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-19 08:04:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:04:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2022-11-19 08:04:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2022-11-19 08:04:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-19 08:04:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-19 08:04:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:04:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2022-11-19 08:04:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2022-11-19 08:04:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_group [2022-11-19 08:04:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_group [2022-11-19 08:04:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:04:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-19 08:04:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-19 08:04:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2022-11-19 08:04:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2022-11-19 08:04:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 08:04:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 08:04:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure lcd_write [2022-11-19 08:04:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure lcd_write [2022-11-19 08:04:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-19 08:04:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-19 08:04:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-19 08:04:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-19 08:04:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-19 08:04:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-19 08:04:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:04:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:04:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:04:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure usb_to_input_id [2022-11-19 08:04:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_to_input_id [2022-11-19 08:04:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2022-11-19 08:04:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2022-11-19 08:04:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2022-11-19 08:04:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure noop_llseek [2022-11-19 08:04:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:04:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:04:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 08:04:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 08:04:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2022-11-19 08:04:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2022-11-19 08:04:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:04:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2022-11-19 08:04:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2022-11-19 08:04:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 08:04:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 08:04:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2022-11-19 08:04:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2022-11-19 08:04:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-19 08:04:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-19 08:04:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-19 08:04:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-19 08:04:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:04:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2022-11-19 08:04:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2022-11-19 08:04:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:04:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2022-11-19 08:04:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2022-11-19 08:04:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 08:04:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-11-19 08:04:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-11-19 08:04:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2022-11-19 08:04:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2022-11-19 08:04:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2022-11-19 08:04:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2022-11-19 08:04:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-19 08:04:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-19 08:04:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_driver_lock [2022-11-19 08:04:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_driver_lock [2022-11-19 08:04:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2022-11-19 08:04:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2022-11-19 08:04:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure imon_find_endpoints [2022-11-19 08:04:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_find_endpoints [2022-11-19 08:04:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2022-11-19 08:04:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2022-11-19 08:04:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:04:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-19 08:04:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-19 08:04:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:04:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:04:11,534 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:04:11,537 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:04:11,945 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:04:18,205 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:04:19,212 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:04:19,213 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:04:19,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:19 BoogieIcfgContainer [2022-11-19 08:04:19,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:04:19,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:04:19,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:04:19,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:04:19,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:07" (1/3) ... [2022-11-19 08:04:19,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f7122f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:19, skipping insertion in model container [2022-11-19 08:04:19,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10" (2/3) ... [2022-11-19 08:04:19,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f7122f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:19, skipping insertion in model container [2022-11-19 08:04:19,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:19" (3/3) ... [2022-11-19 08:04:19,229 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 [2022-11-19 08:04:19,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:04:19,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:04:19,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:04:19,383 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;@64392947, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:04:19,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:04:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 533 states have (on average 1.3358348968105065) internal successors, (712), 555 states have internal predecessors, (712), 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) [2022-11-19 08:04:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-19 08:04:19,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:19,410 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] [2022-11-19 08:04:19,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash -587549544, now seen corresponding path program 1 times [2022-11-19 08:04:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143618632] [2022-11-19 08:04:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-19 08:04:20,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143618632] [2022-11-19 08:04:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143618632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:20,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:20,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:20,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511956135] [2022-11-19 08:04:20,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:20,614 INFO L87 Difference]: Start difference. First operand has 878 states, 533 states have (on average 1.3358348968105065) internal successors, (712), 555 states have internal predecessors, (712), 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) [2022-11-19 08:04:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:26,584 INFO L93 Difference]: Finished difference Result 2489 states and 3683 transitions. [2022-11-19 08:04:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:26,593 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 [2022-11-19 08:04:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:26,624 INFO L225 Difference]: With dead ends: 2489 [2022-11-19 08:04:26,630 INFO L226 Difference]: Without dead ends: 1632 [2022-11-19 08:04:26,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:26,647 INFO L413 NwaCegarLoop]: 1359 mSDtfsCounter, 1152 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 2417 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:26,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 2417 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-19 08:04:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-19 08:04:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1618. [2022-11-19 08:04:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 992 states have (on average 1.3175403225806452) internal successors, (1307), 1013 states have internal predecessors, (1307), 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) [2022-11-19 08:04:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 2310 transitions. [2022-11-19 08:04:26,856 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 2310 transitions. Word has length 167 [2022-11-19 08:04:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:26,863 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 2310 transitions. [2022-11-19 08:04:26,863 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) [2022-11-19 08:04:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 2310 transitions. [2022-11-19 08:04:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-19 08:04:26,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:26,874 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] [2022-11-19 08:04:26,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:04:26,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:26,876 INFO L85 PathProgramCache]: Analyzing trace with hash 104818940, now seen corresponding path program 1 times [2022-11-19 08:04:26,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:26,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820252090] [2022-11-19 08:04:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:26,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-19 08:04:27,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820252090] [2022-11-19 08:04:27,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820252090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:27,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:27,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:27,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509745031] [2022-11-19 08:04:27,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:27,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:27,461 INFO L87 Difference]: Start difference. First operand 1618 states and 2310 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) [2022-11-19 08:04:29,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:31,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:34,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:37,407 INFO L93 Difference]: Finished difference Result 4733 states and 6752 transitions. [2022-11-19 08:04:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:37,414 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 [2022-11-19 08:04:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:37,437 INFO L225 Difference]: With dead ends: 4733 [2022-11-19 08:04:37,437 INFO L226 Difference]: Without dead ends: 3155 [2022-11-19 08:04:37,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:37,447 INFO L413 NwaCegarLoop]: 1428 mSDtfsCounter, 1138 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:37,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 2531 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2022-11-19 08:04:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-11-19 08:04:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 3149. [2022-11-19 08:04:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 1940 states have (on average 1.3185567010309278) internal successors, (2558), 1975 states have internal predecessors, (2558), 969 states have call successors, (969), 240 states have call predecessors, (969), 239 states have return successors, (962), 957 states have call predecessors, (962), 962 states have call successors, (962) [2022-11-19 08:04:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4489 transitions. [2022-11-19 08:04:37,703 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4489 transitions. Word has length 166 [2022-11-19 08:04:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:37,705 INFO L495 AbstractCegarLoop]: Abstraction has 3149 states and 4489 transitions. [2022-11-19 08:04:37,705 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) [2022-11-19 08:04:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4489 transitions. [2022-11-19 08:04:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-19 08:04:37,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:37,709 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] [2022-11-19 08:04:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:04:37,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1924412068, now seen corresponding path program 1 times [2022-11-19 08:04:37,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:37,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247956531] [2022-11-19 08:04:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:37,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-19 08:04:38,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247956531] [2022-11-19 08:04:38,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247956531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:38,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:38,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:38,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965874015] [2022-11-19 08:04:38,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:38,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:38,146 INFO L87 Difference]: Start difference. First operand 3149 states and 4489 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) [2022-11-19 08:04:40,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:43,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:45,661 INFO L93 Difference]: Finished difference Result 7795 states and 11098 transitions. [2022-11-19 08:04:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:45,671 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 [2022-11-19 08:04:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:45,701 INFO L225 Difference]: With dead ends: 7795 [2022-11-19 08:04:45,701 INFO L226 Difference]: Without dead ends: 4686 [2022-11-19 08:04:45,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:45,718 INFO L413 NwaCegarLoop]: 1321 mSDtfsCounter, 658 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:45,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 2365 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-19 08:04:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-11-19 08:04:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 4671. [2022-11-19 08:04:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 2932 states have (on average 1.334242837653479) internal successors, (3912), 2967 states have internal predecessors, (3912), 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) [2022-11-19 08:04:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 6647 transitions. [2022-11-19 08:04:45,959 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 6647 transitions. Word has length 168 [2022-11-19 08:04:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:45,961 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 6647 transitions. [2022-11-19 08:04:45,961 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) [2022-11-19 08:04:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 6647 transitions. [2022-11-19 08:04:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 08:04:45,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:45,964 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] [2022-11-19 08:04:45,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:04:45,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:45,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1929186930, now seen corresponding path program 1 times [2022-11-19 08:04:45,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:45,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98165104] [2022-11-19 08:04:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:45,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-19 08:04:46,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:46,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98165104] [2022-11-19 08:04:46,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98165104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:46,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:46,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281468806] [2022-11-19 08:04:46,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:46,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:46,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:46,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:46,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:46,419 INFO L87 Difference]: Start difference. First operand 4671 states and 6647 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) [2022-11-19 08:04:48,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:49,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:52,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:54,427 INFO L93 Difference]: Finished difference Result 13245 states and 18810 transitions. [2022-11-19 08:04:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:54,436 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 [2022-11-19 08:04:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:54,490 INFO L225 Difference]: With dead ends: 13245 [2022-11-19 08:04:54,490 INFO L226 Difference]: Without dead ends: 8622 [2022-11-19 08:04:54,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:54,512 INFO L413 NwaCegarLoop]: 1470 mSDtfsCounter, 1138 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 2511 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:54,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 2511 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-19 08:04:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2022-11-19 08:04:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 8609. [2022-11-19 08:04:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 5416 states have (on average 1.3316100443131462) internal successors, (7212), 5479 states have internal predecessors, (7212), 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) [2022-11-19 08:04:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 12207 transitions. [2022-11-19 08:04:55,014 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 12207 transitions. Word has length 173 [2022-11-19 08:04:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 8609 states and 12207 transitions. [2022-11-19 08:04:55,016 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) [2022-11-19 08:04:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 12207 transitions. [2022-11-19 08:04:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-19 08:04:55,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:55,019 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] [2022-11-19 08:04:55,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:04:55,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1333179393, now seen corresponding path program 1 times [2022-11-19 08:04:55,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:55,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959158401] [2022-11-19 08:04:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-19 08:04:55,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:55,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959158401] [2022-11-19 08:04:55,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959158401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:55,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:55,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:55,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806690304] [2022-11-19 08:04:55,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:55,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:55,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:55,392 INFO L87 Difference]: Start difference. First operand 8609 states and 12207 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (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) [2022-11-19 08:04:57,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:59,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:03,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:04,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:04,295 INFO L93 Difference]: Finished difference Result 24959 states and 35306 transitions. [2022-11-19 08:05:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (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 180 [2022-11-19 08:05:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:04,390 INFO L225 Difference]: With dead ends: 24959 [2022-11-19 08:05:04,390 INFO L226 Difference]: Without dead ends: 16398 [2022-11-19 08:05:04,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:04,420 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 1139 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 2632 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:04,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 2632 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-11-19 08:05:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16398 states. [2022-11-19 08:05:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16398 to 16383. [2022-11-19 08:05:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16383 states, 10294 states have (on average 1.3299009131532933) internal successors, (13690), 10415 states have internal predecessors, (13690), 4725 states have call successors, (4725), 1364 states have call predecessors, (4725), 1363 states have return successors, (4718), 4699 states have call predecessors, (4718), 4718 states have call successors, (4718) [2022-11-19 08:05:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16383 states to 16383 states and 23133 transitions. [2022-11-19 08:05:05,326 INFO L78 Accepts]: Start accepts. Automaton has 16383 states and 23133 transitions. Word has length 180 [2022-11-19 08:05:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:05,327 INFO L495 AbstractCegarLoop]: Abstraction has 16383 states and 23133 transitions. [2022-11-19 08:05:05,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (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) [2022-11-19 08:05:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 16383 states and 23133 transitions. [2022-11-19 08:05:05,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-19 08:05:05,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:05,330 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] [2022-11-19 08:05:05,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:05:05,331 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1972005519, now seen corresponding path program 1 times [2022-11-19 08:05:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223026515] [2022-11-19 08:05:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:05,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-19 08:05:05,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:05,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223026515] [2022-11-19 08:05:05,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223026515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:05,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:05,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:05,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684925738] [2022-11-19 08:05:05,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:05,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:05,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:05,735 INFO L87 Difference]: Start difference. First operand 16383 states and 23133 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) [2022-11-19 08:05:07,798 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 [] [2022-11-19 08:05:11,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:16,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:16,056 INFO L93 Difference]: Finished difference Result 47369 states and 66586 transitions. [2022-11-19 08:05:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:16,064 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 [2022-11-19 08:05:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:16,209 INFO L225 Difference]: With dead ends: 47369 [2022-11-19 08:05:16,210 INFO L226 Difference]: Without dead ends: 31034 [2022-11-19 08:05:16,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:16,272 INFO L413 NwaCegarLoop]: 1624 mSDtfsCounter, 1086 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:16,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 2728 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 290 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2022-11-19 08:05:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31034 states. [2022-11-19 08:05:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31034 to 31019. [2022-11-19 08:05:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31019 states, 19360 states have (on average 1.3194214876033057) internal successors, (25544), 19597 states have internal predecessors, (25544), 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) [2022-11-19 08:05:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31019 states to 31019 states and 43471 transitions. [2022-11-19 08:05:18,141 INFO L78 Accepts]: Start accepts. Automaton has 31019 states and 43471 transitions. Word has length 179 [2022-11-19 08:05:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:18,142 INFO L495 AbstractCegarLoop]: Abstraction has 31019 states and 43471 transitions. [2022-11-19 08:05:18,143 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) [2022-11-19 08:05:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 31019 states and 43471 transitions. [2022-11-19 08:05:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-19 08:05:18,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:18,148 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] [2022-11-19 08:05:18,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:05:18,149 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2068415916, now seen corresponding path program 1 times [2022-11-19 08:05:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594061897] [2022-11-19 08:05:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-19 08:05:18,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:18,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594061897] [2022-11-19 08:05:18,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594061897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:18,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:18,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:18,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054247610] [2022-11-19 08:05:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:18,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:18,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:18,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:18,648 INFO L87 Difference]: Start difference. First operand 31019 states and 43471 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) [2022-11-19 08:05:20,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:22,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:25,587 INFO L93 Difference]: Finished difference Result 34969 states and 47771 transitions. [2022-11-19 08:05:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:25,588 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 [2022-11-19 08:05:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:25,820 INFO L225 Difference]: With dead ends: 34969 [2022-11-19 08:05:25,820 INFO L226 Difference]: Without dead ends: 34965 [2022-11-19 08:05:25,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:25,832 INFO L413 NwaCegarLoop]: 1152 mSDtfsCounter, 737 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:25,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1643 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-19 08:05:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34965 states. [2022-11-19 08:05:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34965 to 34961. [2022-11-19 08:05:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34961 states, 21660 states have (on average 1.3039242843951986) internal successors, (28243), 21895 states have internal predecessors, (28243), 9735 states have call successors, (9735), 3566 states have call predecessors, (9735), 3565 states have return successors, (9730), 9691 states have call predecessors, (9730), 9730 states have call successors, (9730) [2022-11-19 08:05:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34961 states to 34961 states and 47708 transitions. [2022-11-19 08:05:27,650 INFO L78 Accepts]: Start accepts. Automaton has 34961 states and 47708 transitions. Word has length 181 [2022-11-19 08:05:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:27,651 INFO L495 AbstractCegarLoop]: Abstraction has 34961 states and 47708 transitions. [2022-11-19 08:05:27,651 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) [2022-11-19 08:05:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 34961 states and 47708 transitions. [2022-11-19 08:05:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-19 08:05:27,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:27,654 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] [2022-11-19 08:05:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:05:27,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -304017549, now seen corresponding path program 1 times [2022-11-19 08:05:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988617151] [2022-11-19 08:05:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-19 08:05:28,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988617151] [2022-11-19 08:05:28,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988617151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:28,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:28,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113401463] [2022-11-19 08:05:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:28,080 INFO L87 Difference]: Start difference. First operand 34961 states and 47708 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) [2022-11-19 08:05:31,771 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 [] [2022-11-19 08:05:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:36,382 INFO L93 Difference]: Finished difference Result 86007 states and 117056 transitions. [2022-11-19 08:05:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:36,389 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 [2022-11-19 08:05:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:36,615 INFO L225 Difference]: With dead ends: 86007 [2022-11-19 08:05:36,615 INFO L226 Difference]: Without dead ends: 51094 [2022-11-19 08:05:36,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:36,705 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 712 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:36,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 2188 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-11-19 08:05:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51094 states. [2022-11-19 08:05:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51094 to 50592. [2022-11-19 08:05:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50592 states, 31816 states have (on average 1.3105041488559215) internal successors, (41695), 32454 states have internal predecessors, (41695), 13315 states have call successors, (13315), 5610 states have call predecessors, (13315), 5460 states have return successors, (13564), 12783 states have call predecessors, (13564), 13308 states have call successors, (13564) [2022-11-19 08:05:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50592 states to 50592 states and 68574 transitions. [2022-11-19 08:05:39,473 INFO L78 Accepts]: Start accepts. Automaton has 50592 states and 68574 transitions. Word has length 182 [2022-11-19 08:05:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:39,475 INFO L495 AbstractCegarLoop]: Abstraction has 50592 states and 68574 transitions. [2022-11-19 08:05:39,475 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) [2022-11-19 08:05:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50592 states and 68574 transitions. [2022-11-19 08:05:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-19 08:05:39,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:39,479 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] [2022-11-19 08:05:39,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:05:39,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash -835006065, now seen corresponding path program 1 times [2022-11-19 08:05:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:39,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205991536] [2022-11-19 08:05:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:39,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-19 08:05:39,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:39,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205991536] [2022-11-19 08:05:39,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205991536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:39,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:39,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:39,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351614631] [2022-11-19 08:05:39,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:39,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:39,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:39,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:39,947 INFO L87 Difference]: Start difference. First operand 50592 states and 68574 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) [2022-11-19 08:05:42,010 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 [] [2022-11-19 08:05:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:46,895 INFO L93 Difference]: Finished difference Result 50594 states and 68575 transitions. [2022-11-19 08:05:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:46,903 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 [2022-11-19 08:05:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:47,115 INFO L225 Difference]: With dead ends: 50594 [2022-11-19 08:05:47,116 INFO L226 Difference]: Without dead ends: 50587 [2022-11-19 08:05:47,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:47,136 INFO L413 NwaCegarLoop]: 1107 mSDtfsCounter, 1182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:47,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 1107 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-19 08:05:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50587 states. [2022-11-19 08:05:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50587 to 50587. [2022-11-19 08:05:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50587 states, 31812 states have (on average 1.3089714573117062) internal successors, (41641), 32449 states have internal predecessors, (41641), 13314 states have call successors, (13314), 5610 states have call predecessors, (13314), 5460 states have return successors, (13564), 12783 states have call predecessors, (13564), 13308 states have call successors, (13564) [2022-11-19 08:05:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50587 states to 50587 states and 68519 transitions. [2022-11-19 08:05:49,783 INFO L78 Accepts]: Start accepts. Automaton has 50587 states and 68519 transitions. Word has length 183 [2022-11-19 08:05:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:49,784 INFO L495 AbstractCegarLoop]: Abstraction has 50587 states and 68519 transitions. [2022-11-19 08:05:49,784 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) [2022-11-19 08:05:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 50587 states and 68519 transitions. [2022-11-19 08:05:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-19 08:05:49,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:49,790 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:49,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:05:49,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1486409204, now seen corresponding path program 1 times [2022-11-19 08:05:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:49,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50692683] [2022-11-19 08:05:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-11-19 08:05:50,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:50,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50692683] [2022-11-19 08:05:50,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50692683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:50,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:50,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668882583] [2022-11-19 08:05:50,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:50,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:50,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:50,556 INFO L87 Difference]: Start difference. First operand 50587 states and 68519 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-19 08:05:51,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:53,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:55,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:57,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:00,901 INFO L93 Difference]: Finished difference Result 76311 states and 103332 transitions. [2022-11-19 08:06:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:00,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 251 [2022-11-19 08:06:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:01,025 INFO L225 Difference]: With dead ends: 76311 [2022-11-19 08:06:01,025 INFO L226 Difference]: Without dead ends: 25756 [2022-11-19 08:06:01,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:01,146 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 6 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:01,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2212 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2022-11-19 08:06:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25756 states. [2022-11-19 08:06:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25756 to 25527. [2022-11-19 08:06:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25527 states, 16034 states have (on average 1.311276038418361) internal successors, (21025), 16361 states have internal predecessors, (21025), 6724 states have call successors, (6724), 2844 states have call predecessors, (6724), 2768 states have return successors, (6846), 6449 states have call predecessors, (6846), 6718 states have call successors, (6846) [2022-11-19 08:06:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25527 states to 25527 states and 34595 transitions. [2022-11-19 08:06:02,501 INFO L78 Accepts]: Start accepts. Automaton has 25527 states and 34595 transitions. Word has length 251 [2022-11-19 08:06:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:02,502 INFO L495 AbstractCegarLoop]: Abstraction has 25527 states and 34595 transitions. [2022-11-19 08:06:02,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-19 08:06:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25527 states and 34595 transitions. [2022-11-19 08:06:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-11-19 08:06:02,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:02,511 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, 1] [2022-11-19 08:06:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:06:02,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1454284307, now seen corresponding path program 1 times [2022-11-19 08:06:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:02,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422493971] [2022-11-19 08:06:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1638 trivial. 0 not checked. [2022-11-19 08:06:02,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:02,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422493971] [2022-11-19 08:06:02,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422493971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:02,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:02,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:06:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388766394] [2022-11-19 08:06:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:02,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:02,995 INFO L87 Difference]: Start difference. First operand 25527 states and 34595 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2022-11-19 08:06:04,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:06,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:08,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:12,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:14,549 INFO L93 Difference]: Finished difference Result 63665 states and 86406 transitions. [2022-11-19 08:06:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:14,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 298 [2022-11-19 08:06:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:14,689 INFO L225 Difference]: With dead ends: 63665 [2022-11-19 08:06:14,689 INFO L226 Difference]: Without dead ends: 38233 [2022-11-19 08:06:14,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:14,754 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 1149 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 2637 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:14,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 2637 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 302 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-11-19 08:06:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38233 states. [2022-11-19 08:06:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38233 to 38207. [2022-11-19 08:06:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38207 states, 24128 states have (on average 1.3107178381962865) internal successors, (31625), 24619 states have internal predecessors, (31625), 9970 states have call successors, (9970), 4220 states have call predecessors, (9970), 4108 states have return successors, (10124), 9559 states have call predecessors, (10124), 9964 states have call successors, (10124) [2022-11-19 08:06:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38207 states to 38207 states and 51719 transitions. [2022-11-19 08:06:16,447 INFO L78 Accepts]: Start accepts. Automaton has 38207 states and 51719 transitions. Word has length 298 [2022-11-19 08:06:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:16,447 INFO L495 AbstractCegarLoop]: Abstraction has 38207 states and 51719 transitions. [2022-11-19 08:06:16,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2022-11-19 08:06:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 38207 states and 51719 transitions. [2022-11-19 08:06:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-19 08:06:16,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:16,452 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] [2022-11-19 08:06:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:06:16,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1653012167, now seen corresponding path program 1 times [2022-11-19 08:06:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416727205] [2022-11-19 08:06:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-11-19 08:06:17,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:17,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416727205] [2022-11-19 08:06:17,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416727205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:17,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:17,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:06:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944773358] [2022-11-19 08:06:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:17,104 INFO L87 Difference]: Start difference. First operand 38207 states and 51719 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) [2022-11-19 08:06:19,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:21,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:25,758 INFO L93 Difference]: Finished difference Result 76322 states and 103313 transitions. [2022-11-19 08:06:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:25,764 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 297 [2022-11-19 08:06:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:25,856 INFO L225 Difference]: With dead ends: 76322 [2022-11-19 08:06:25,857 INFO L226 Difference]: Without dead ends: 38210 [2022-11-19 08:06:25,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:25,938 INFO L413 NwaCegarLoop]: 1542 mSDtfsCounter, 1022 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:25,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 2212 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2022-11-19 08:06:26,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38210 states. [2022-11-19 08:06:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38210 to 37645. [2022-11-19 08:06:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37645 states, 23889 states have (on average 1.306626480807066) internal successors, (31214), 24211 states have internal predecessors, (31214), 9670 states have call successors, (9670), 4112 states have call predecessors, (9670), 4085 states have return successors, (9605), 9513 states have call predecessors, (9605), 9605 states have call successors, (9605) [2022-11-19 08:06:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37645 states to 37645 states and 50489 transitions. [2022-11-19 08:06:27,588 INFO L78 Accepts]: Start accepts. Automaton has 37645 states and 50489 transitions. Word has length 297 [2022-11-19 08:06:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:27,589 INFO L495 AbstractCegarLoop]: Abstraction has 37645 states and 50489 transitions. [2022-11-19 08:06:27,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-19 08:06:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 37645 states and 50489 transitions. [2022-11-19 08:06:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-11-19 08:06:27,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:27,596 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:27,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:06:27,597 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:27,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1257963503, now seen corresponding path program 1 times [2022-11-19 08:06:27,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:27,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798761157] [2022-11-19 08:06:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-11-19 08:06:28,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:28,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798761157] [2022-11-19 08:06:28,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798761157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:28,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:28,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:06:28,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349609431] [2022-11-19 08:06:28,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:28,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:28,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:28,376 INFO L87 Difference]: Start difference. First operand 37645 states and 50489 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-19 08:06:30,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:32,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:34,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:37,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:38,162 INFO L93 Difference]: Finished difference Result 37655 states and 50497 transitions. [2022-11-19 08:06:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 305 [2022-11-19 08:06:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:38,278 INFO L225 Difference]: With dead ends: 37655 [2022-11-19 08:06:38,279 INFO L226 Difference]: Without dead ends: 37652 [2022-11-19 08:06:38,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:38,296 INFO L413 NwaCegarLoop]: 1197 mSDtfsCounter, 561 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:38,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1905 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-19 08:06:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37652 states. [2022-11-19 08:06:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37652 to 37644. [2022-11-19 08:06:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37644 states, 23889 states have (on average 1.3032776591736783) internal successors, (31134), 24210 states have internal predecessors, (31134), 9669 states have call successors, (9669), 4112 states have call predecessors, (9669), 4085 states have return successors, (9605), 9513 states have call predecessors, (9605), 9605 states have call successors, (9605) [2022-11-19 08:06:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37644 states to 37644 states and 50408 transitions. [2022-11-19 08:06:39,862 INFO L78 Accepts]: Start accepts. Automaton has 37644 states and 50408 transitions. Word has length 305 [2022-11-19 08:06:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:39,863 INFO L495 AbstractCegarLoop]: Abstraction has 37644 states and 50408 transitions. [2022-11-19 08:06:39,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-19 08:06:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 37644 states and 50408 transitions. [2022-11-19 08:06:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-11-19 08:06:39,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:39,901 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:39,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:06:39,902 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:39,903 INFO L85 PathProgramCache]: Analyzing trace with hash 871955075, now seen corresponding path program 1 times [2022-11-19 08:06:39,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:39,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531853114] [2022-11-19 08:06:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-11-19 08:06:41,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531853114] [2022-11-19 08:06:41,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531853114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:41,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:41,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:06:41,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193765261] [2022-11-19 08:06:41,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:41,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:06:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:41,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:06:41,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:06:41,620 INFO L87 Difference]: Start difference. First operand 37644 states and 50408 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-19 08:06:43,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:47,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:49,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:06:50,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:00,950 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 [] [2022-11-19 08:07:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:00,966 INFO L93 Difference]: Finished difference Result 100287 states and 140717 transitions. [2022-11-19 08:07:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:07:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 355 [2022-11-19 08:07:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:01,135 INFO L225 Difference]: With dead ends: 100287 [2022-11-19 08:07:01,135 INFO L226 Difference]: Without dead ends: 62738 [2022-11-19 08:07:01,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:07:01,201 INFO L413 NwaCegarLoop]: 1721 mSDtfsCounter, 954 mSDsluCounter, 2606 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 4327 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:01,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 4327 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 16.8s Time] [2022-11-19 08:07:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62738 states. [2022-11-19 08:07:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62738 to 37692. [2022-11-19 08:07:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37692 states, 23937 states have (on average 1.3016668755483143) internal successors, (31158), 24258 states have internal predecessors, (31158), 9669 states have call successors, (9669), 4112 states have call predecessors, (9669), 4085 states have return successors, (9605), 9513 states have call predecessors, (9605), 9605 states have call successors, (9605) [2022-11-19 08:07:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37692 states to 37692 states and 50432 transitions. [2022-11-19 08:07:03,508 INFO L78 Accepts]: Start accepts. Automaton has 37692 states and 50432 transitions. Word has length 355 [2022-11-19 08:07:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:03,509 INFO L495 AbstractCegarLoop]: Abstraction has 37692 states and 50432 transitions. [2022-11-19 08:07:03,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-19 08:07:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 37692 states and 50432 transitions. [2022-11-19 08:07:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-19 08:07:03,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:03,550 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:07:03,551 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1051533933, now seen corresponding path program 1 times [2022-11-19 08:07:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655387982] [2022-11-19 08:07:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-11-19 08:07:04,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655387982] [2022-11-19 08:07:04,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655387982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:04,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:07:04,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:07:04,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475871387] [2022-11-19 08:07:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:04,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:07:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:07:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:07:04,073 INFO L87 Difference]: Start difference. First operand 37692 states and 50432 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-19 08:07:05,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:07,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:10,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:14,122 INFO L93 Difference]: Finished difference Result 86414 states and 118499 transitions. [2022-11-19 08:07:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:07:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 359 [2022-11-19 08:07:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:14,268 INFO L225 Difference]: With dead ends: 86414 [2022-11-19 08:07:14,268 INFO L226 Difference]: Without dead ends: 48817 [2022-11-19 08:07:14,327 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 [2022-11-19 08:07:14,328 INFO L413 NwaCegarLoop]: 1487 mSDtfsCounter, 339 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 2556 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:14,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 2556 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 271 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-19 08:07:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48817 states. [2022-11-19 08:07:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48817 to 37740. [2022-11-19 08:07:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37740 states, 23961 states have (on average 1.3003630900212846) internal successors, (31158), 24282 states have internal predecessors, (31158), 9693 states have call successors, (9693), 4112 states have call predecessors, (9693), 4085 states have return successors, (9629), 9537 states have call predecessors, (9629), 9629 states have call successors, (9629) [2022-11-19 08:07:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37740 states to 37740 states and 50480 transitions. [2022-11-19 08:07:16,500 INFO L78 Accepts]: Start accepts. Automaton has 37740 states and 50480 transitions. Word has length 359 [2022-11-19 08:07:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:16,501 INFO L495 AbstractCegarLoop]: Abstraction has 37740 states and 50480 transitions. [2022-11-19 08:07:16,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-19 08:07:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 37740 states and 50480 transitions. [2022-11-19 08:07:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-11-19 08:07:16,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:16,545 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:16,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:07:16,546 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash -579299884, now seen corresponding path program 1 times [2022-11-19 08:07:16,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434033768] [2022-11-19 08:07:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:16,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-11-19 08:07:18,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:18,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434033768] [2022-11-19 08:07:18,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434033768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:18,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:07:18,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:07:18,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836591795] [2022-11-19 08:07:18,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:18,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:07:18,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:07:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:07:18,110 INFO L87 Difference]: Start difference. First operand 37740 states and 50480 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-19 08:07:19,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:24,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:30,285 INFO L93 Difference]: Finished difference Result 99065 states and 138673 transitions. [2022-11-19 08:07:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:07:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 362 [2022-11-19 08:07:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:30,451 INFO L225 Difference]: With dead ends: 99065 [2022-11-19 08:07:30,451 INFO L226 Difference]: Without dead ends: 61420 [2022-11-19 08:07:30,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:07:30,519 INFO L413 NwaCegarLoop]: 1691 mSDtfsCounter, 933 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 191 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 4281 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:30,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 4281 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 460 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2022-11-19 08:07:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61420 states. [2022-11-19 08:07:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61420 to 37345. [2022-11-19 08:07:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37345 states, 23762 states have (on average 1.2998064136015486) internal successors, (30886), 24059 states have internal predecessors, (30886), 9570 states have call successors, (9570), 4039 states have call predecessors, (9570), 4012 states have return successors, (9507), 9438 states have call predecessors, (9507), 9507 states have call successors, (9507) [2022-11-19 08:07:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37345 states to 37345 states and 49963 transitions. [2022-11-19 08:07:33,468 INFO L78 Accepts]: Start accepts. Automaton has 37345 states and 49963 transitions. Word has length 362 [2022-11-19 08:07:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:33,468 INFO L495 AbstractCegarLoop]: Abstraction has 37345 states and 49963 transitions. [2022-11-19 08:07:33,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-19 08:07:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37345 states and 49963 transitions. [2022-11-19 08:07:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-11-19 08:07:33,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:33,543 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:33,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:07:33,544 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash 170213533, now seen corresponding path program 1 times [2022-11-19 08:07:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627365687] [2022-11-19 08:07:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:33,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-11-19 08:07:35,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627365687] [2022-11-19 08:07:35,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627365687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548398665] [2022-11-19 08:07:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:35,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:35,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:35,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:35,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:07:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 6185 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:07:38,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2022-11-19 08:07:38,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:07:38,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548398665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:38,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:07:38,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2022-11-19 08:07:38,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831439193] [2022-11-19 08:07:38,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:07:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:38,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:07:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:07:38,217 INFO L87 Difference]: Start difference. First operand 37345 states and 49963 transitions. Second operand has 7 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-19 08:07:41,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:43,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:46,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:48,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:50,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:52,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:54,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:55,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:57,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:02,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:03,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:06,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:07,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:09,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:17,710 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 [] [2022-11-19 08:08:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:19,399 INFO L93 Difference]: Finished difference Result 89757 states and 124152 transitions. [2022-11-19 08:08:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:08:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) Word has length 415 [2022-11-19 08:08:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:19,686 INFO L225 Difference]: With dead ends: 89757 [2022-11-19 08:08:19,687 INFO L226 Difference]: Without dead ends: 52507 [2022-11-19 08:08:19,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:08:19,748 INFO L413 NwaCegarLoop]: 1655 mSDtfsCounter, 357 mSDsluCounter, 7822 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 9477 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:19,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 9477 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1005 Invalid, 7 Unknown, 0 Unchecked, 37.4s Time] [2022-11-19 08:08:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52507 states. [2022-11-19 08:08:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52507 to 37633. [2022-11-19 08:08:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37633 states, 23954 states have (on average 1.2974033564331635) internal successors, (31078), 24251 states have internal predecessors, (31078), 9570 states have call successors, (9570), 4039 states have call predecessors, (9570), 4108 states have return successors, (9923), 9534 states have call predecessors, (9923), 9507 states have call successors, (9923) [2022-11-19 08:08:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37633 states to 37633 states and 50571 transitions. [2022-11-19 08:08:23,176 INFO L78 Accepts]: Start accepts. Automaton has 37633 states and 50571 transitions. Word has length 415 [2022-11-19 08:08:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:23,176 INFO L495 AbstractCegarLoop]: Abstraction has 37633 states and 50571 transitions. [2022-11-19 08:08:23,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-19 08:08:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 37633 states and 50571 transitions. [2022-11-19 08:08:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-11-19 08:08:23,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:23,248 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:23,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:23,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:08:23,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash -776828998, now seen corresponding path program 1 times [2022-11-19 08:08:23,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:23,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900346836] [2022-11-19 08:08:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:23,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1725 trivial. 0 not checked. [2022-11-19 08:08:24,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900346836] [2022-11-19 08:08:24,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900346836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:24,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:24,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:24,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040686559] [2022-11-19 08:08:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:24,827 INFO L87 Difference]: Start difference. First operand 37633 states and 50571 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-19 08:08:26,884 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 [] [2022-11-19 08:08:30,223 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 [] [2022-11-19 08:08:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:35,095 INFO L93 Difference]: Finished difference Result 75435 states and 101495 transitions. [2022-11-19 08:08:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 419 [2022-11-19 08:08:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:35,194 INFO L225 Difference]: With dead ends: 75435 [2022-11-19 08:08:35,194 INFO L226 Difference]: Without dead ends: 37897 [2022-11-19 08:08:35,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:35,253 INFO L413 NwaCegarLoop]: 1107 mSDtfsCounter, 11 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:35,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2204 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-11-19 08:08:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37897 states. [2022-11-19 08:08:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37897 to 37801. [2022-11-19 08:08:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37801 states, 24098 states have (on average 1.2986139928624783) internal successors, (31294), 24395 states have internal predecessors, (31294), 9594 states have call successors, (9594), 4039 states have call predecessors, (9594), 4108 states have return successors, (9947), 9558 states have call predecessors, (9947), 9531 states have call successors, (9947) [2022-11-19 08:08:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37801 states to 37801 states and 50835 transitions. [2022-11-19 08:08:38,163 INFO L78 Accepts]: Start accepts. Automaton has 37801 states and 50835 transitions. Word has length 419 [2022-11-19 08:08:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:38,163 INFO L495 AbstractCegarLoop]: Abstraction has 37801 states and 50835 transitions. [2022-11-19 08:08:38,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-19 08:08:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 37801 states and 50835 transitions. [2022-11-19 08:08:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-11-19 08:08:38,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:38,213 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:38,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:08:38,213 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1992481698, now seen corresponding path program 1 times [2022-11-19 08:08:38,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:38,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445071293] [2022-11-19 08:08:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1724 trivial. 0 not checked. [2022-11-19 08:08:40,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:40,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445071293] [2022-11-19 08:08:40,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445071293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634546946] [2022-11-19 08:08:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:40,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:40,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:40,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:08:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 6300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:08:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1727 trivial. 0 not checked. [2022-11-19 08:08:42,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:08:42,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634546946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:42,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:08:42,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 10 [2022-11-19 08:08:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418375161] [2022-11-19 08:08:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:42,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:08:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:08:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:08:42,377 INFO L87 Difference]: Start difference. First operand 37801 states and 50835 transitions. Second operand has 8 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2022-11-19 08:08:43,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:45,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:47,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:49,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:55,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:08,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:14,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:22,955 INFO L93 Difference]: Finished difference Result 120245 states and 173110 transitions. [2022-11-19 08:09:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:09:22,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) Word has length 423 [2022-11-19 08:09:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:23,216 INFO L225 Difference]: With dead ends: 120245 [2022-11-19 08:09:23,216 INFO L226 Difference]: Without dead ends: 82539 [2022-11-19 08:09:23,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:09:23,285 INFO L413 NwaCegarLoop]: 2670 mSDtfsCounter, 850 mSDsluCounter, 14399 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 237 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 17069 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:23,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 17069 Invalid, 1830 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [237 Valid, 1591 Invalid, 2 Unknown, 0 Unchecked, 33.3s Time] [2022-11-19 08:09:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82539 states. [2022-11-19 08:09:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82539 to 38425. [2022-11-19 08:09:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38425 states, 24602 states have (on average 1.3012763189984553) internal successors, (32014), 24899 states have internal predecessors, (32014), 9690 states have call successors, (9690), 4039 states have call predecessors, (9690), 4132 states have return successors, (10091), 9678 states have call predecessors, (10091), 9627 states have call successors, (10091) [2022-11-19 08:09:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38425 states to 38425 states and 51795 transitions. [2022-11-19 08:09:27,103 INFO L78 Accepts]: Start accepts. Automaton has 38425 states and 51795 transitions. Word has length 423 [2022-11-19 08:09:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:27,104 INFO L495 AbstractCegarLoop]: Abstraction has 38425 states and 51795 transitions. [2022-11-19 08:09:27,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2022-11-19 08:09:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 38425 states and 51795 transitions. [2022-11-19 08:09:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-11-19 08:09:27,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:27,159 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:27,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:27,359 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2096558114, now seen corresponding path program 1 times [2022-11-19 08:09:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:27,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123601235] [2022-11-19 08:09:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2022-11-19 08:09:30,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:30,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123601235] [2022-11-19 08:09:30,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123601235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:30,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374432493] [2022-11-19 08:09:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:30,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:30,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:30,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:30,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:09:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 6407 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:09:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 852 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-19 08:09:33,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:33,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374432493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:33,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 08:09:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731011701] [2022-11-19 08:09:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:09:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:09:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:09:33,461 INFO L87 Difference]: Start difference. First operand 38425 states and 51795 transitions. Second operand has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2022-11-19 08:09:36,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:38,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:41,744 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 [] [2022-11-19 08:09:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:48,243 INFO L93 Difference]: Finished difference Result 76824 states and 103563 transitions. [2022-11-19 08:09:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:09:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 430 [2022-11-19 08:09:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:48,356 INFO L225 Difference]: With dead ends: 76824 [2022-11-19 08:09:48,356 INFO L226 Difference]: Without dead ends: 38426 [2022-11-19 08:09:48,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:09:48,412 INFO L413 NwaCegarLoop]: 1103 mSDtfsCounter, 1 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:48,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3289 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 401 Invalid, 3 Unknown, 0 Unchecked, 11.9s Time] [2022-11-19 08:09:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38426 states. [2022-11-19 08:09:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38426 to 38426. [2022-11-19 08:09:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38426 states, 24603 states have (on average 1.3012640734869731) internal successors, (32015), 24900 states have internal predecessors, (32015), 9690 states have call successors, (9690), 4039 states have call predecessors, (9690), 4132 states have return successors, (10091), 9678 states have call predecessors, (10091), 9627 states have call successors, (10091) [2022-11-19 08:09:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38426 states to 38426 states and 51796 transitions. [2022-11-19 08:09:51,403 INFO L78 Accepts]: Start accepts. Automaton has 38426 states and 51796 transitions. Word has length 430 [2022-11-19 08:09:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:51,404 INFO L495 AbstractCegarLoop]: Abstraction has 38426 states and 51796 transitions. [2022-11-19 08:09:51,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2022-11-19 08:09:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 38426 states and 51796 transitions. [2022-11-19 08:09:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-11-19 08:09:51,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:51,458 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:51,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:51,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:51,659 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1370686008, now seen corresponding path program 1 times [2022-11-19 08:09:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424650989] [2022-11-19 08:09:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2022-11-19 08:09:55,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424650989] [2022-11-19 08:09:55,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424650989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591326531] [2022-11-19 08:09:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:55,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:55,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:55,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d046edb9-4287-46fc-9996-0997312927f3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:09:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 6542 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:09:59,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 876 proven. 1 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2022-11-19 08:10:00,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2022-11-19 08:10:00,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591326531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:00,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072972790] [2022-11-19 08:10:00,627 INFO L159 IcfgInterpreter]: Started Sifa with 199 locations of interest [2022-11-19 08:10:00,627 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:10:00,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:10:00,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:10:00,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:10:12,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:10:16,058 INFO L217 Elim1Store]: Index analysis took 4750 ms