./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.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_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/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_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/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_f30b8e53-bce5-444d-aadf-edb2f5448c39/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 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a --- 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 08:02:19,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:02:19,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:02:19,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:02:19,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:02:19,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:02:19,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:02:19,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:02:19,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:02:19,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:02:19,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:02:19,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:02:19,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:02:19,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:02:19,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:02:19,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:02:19,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:02:19,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:02:19,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:02:19,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:02:19,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:02:19,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:02:19,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:02:19,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:02:19,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:02:19,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:02:19,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:02:19,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:02:19,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:02:19,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:02:19,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:02:19,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:02:19,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:02:19,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:02:19,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:02:19,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:02:19,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:02:19,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:02:19,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:02:19,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:02:19,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:02:19,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:02:19,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:02:19,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:02:19,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:02:19,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:02:19,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:02:19,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:02:19,184 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:02:19,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:02:19,185 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:02:19,185 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:02:19,186 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:02:19,186 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:02:19,186 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:02:19,187 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:02:19,187 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:02:19,187 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:02:19,188 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:02:19,188 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:02:19,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:02:19,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:02:19,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:02:19,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:02:19,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:02:19,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:02:19,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:02:19,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:02:19,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:02:19,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:02:19,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:02:19,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:02:19,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:02:19,193 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:02:19,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:02:19,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:02:19,193 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:02:19,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:02:19,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:02:19,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:02:19,194 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a [2022-11-19 08:02:19,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:02:19,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:02:19,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:02:19,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:02:19,551 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:02:19,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2022-11-19 08:02:19,648 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/data/2f214cd88/93821dce280d4eefb2185e757e778c5a/FLAGb2f61bd49 [2022-11-19 08:02:20,663 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:02:20,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2022-11-19 08:02:20,731 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/data/2f214cd88/93821dce280d4eefb2185e757e778c5a/FLAGb2f61bd49 [2022-11-19 08:02:21,038 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/data/2f214cd88/93821dce280d4eefb2185e757e778c5a [2022-11-19 08:02:21,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:02:21,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:02:21,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:02:21,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:02:21,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:02:21,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:21" (1/1) ... [2022-11-19 08:02:21,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee75913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:21, skipping insertion in model container [2022-11-19 08:02:21,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:21" (1/1) ... [2022-11-19 08:02:21,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:02:21,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:02:25,765 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2022-11-19 08:02:25,770 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2022-11-19 08:02:25,771 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2022-11-19 08:02:25,772 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2022-11-19 08:02:25,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:02:25,832 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:02:26,430 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2022-11-19 08:02:26,431 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2022-11-19 08:02:26,432 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2022-11-19 08:02:26,433 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_f30b8e53-bce5-444d-aadf-edb2f5448c39/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2022-11-19 08:02:26,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:02:26,779 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:02:26,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26 WrapperNode [2022-11-19 08:02:26,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:02:26,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:02:26,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:02:26,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:02:26,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:26,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,288 INFO L138 Inliner]: procedures = 541, calls = 2859, calls flagged for inlining = 282, calls inlined = 248, statements flattened = 7341 [2022-11-19 08:02:27,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:02:27,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:02:27,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:02:27,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:02:27,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:02:27,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:02:27,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:02:27,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:02:27,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2022-11-19 08:02:27,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:02:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:27,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:02:27,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:02:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2022-11-19 08:02:27,933 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2022-11-19 08:02:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 08:02:27,933 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 08:02:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-19 08:02:27,934 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-19 08:02:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-19 08:02:27,934 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-19 08:02:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:02:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:02:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-19 08:02:27,987 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-19 08:02:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-19 08:02:27,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-19 08:02:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 08:02:27,987 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 08:02:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 08:02:27,987 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 08:02:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2022-11-19 08:02:27,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2022-11-19 08:02:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_interrupt [2022-11-19 08:02:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_interrupt [2022-11-19 08:02:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-19 08:02:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-19 08:02:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-19 08:02:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-19 08:02:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-19 08:02:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-19 08:02:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-19 08:02:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-19 08:02:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-19 08:02:27,989 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-19 08:02:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 08:02:27,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 08:02:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-19 08:02:27,989 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-19 08:02:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:02:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_bcr [2022-11-19 08:02:27,989 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_bcr [2022-11-19 08:02:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 08:02:27,990 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 08:02:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 08:02:27,990 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 08:02:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:02:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 08:02:27,990 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 08:02:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2022-11-19 08:02:27,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2022-11-19 08:02:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:02:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-19 08:02:27,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-19 08:02:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_tx_ring [2022-11-19 08:02:27,991 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_tx_ring [2022-11-19 08:02:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:02:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-19 08:02:27,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-19 08:02:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 08:02:27,991 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 08:02:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_bcr [2022-11-19 08:02:27,991 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_bcr [2022-11-19 08:02:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-19 08:02:27,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-19 08:02:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-19 08:02:27,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-19 08:02:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-19 08:02:27,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-19 08:02:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-19 08:02:27,992 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-19 08:02:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-19 08:02:27,992 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-19 08:02:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_start [2022-11-19 08:02:27,993 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_start [2022-11-19 08:02:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2022-11-19 08:02:27,993 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2022-11-19 08:02:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~~u16~0 [2022-11-19 08:02:27,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~~u16~0 [2022-11-19 08:02:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-19 08:02:27,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-19 08:02:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:02:27,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-19 08:02:27,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-19 08:02:27,994 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_open [2022-11-19 08:02:27,994 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_open [2022-11-19 08:02:27,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:02:27,994 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-19 08:02:27,994 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-19 08:02:27,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 08:02:27,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 08:02:27,996 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-19 08:02:27,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-19 08:02:27,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:02:27,996 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 08:02:27,996 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:02:27,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:02:27,996 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_reset [2022-11-19 08:02:27,997 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_reset [2022-11-19 08:02:27,997 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_pcnet32_private [2022-11-19 08:02:27,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_pcnet32_private [2022-11-19 08:02:27,997 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-19 08:02:27,997 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-19 08:02:27,997 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_restart [2022-11-19 08:02:27,998 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_restart [2022-11-19 08:02:27,998 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-19 08:02:27,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-19 08:02:27,999 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2022-11-19 08:02:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2022-11-19 08:02:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 08:02:28,004 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 08:02:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-19 08:02:28,004 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-19 08:02:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-19 08:02:28,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-19 08:02:28,005 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_csr [2022-11-19 08:02:28,005 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_csr [2022-11-19 08:02:28,005 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2022-11-19 08:02:28,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2022-11-19 08:02:28,005 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 08:02:28,006 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 08:02:28,006 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_reset [2022-11-19 08:02:28,006 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_reset [2022-11-19 08:02:28,006 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2022-11-19 08:02:28,006 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2022-11-19 08:02:28,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:02:28,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:02:28,007 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-19 08:02:28,007 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-19 08:02:28,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:02:28,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:02:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:02:28,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:02:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_pm_resume [2022-11-19 08:02:28,008 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_pm_resume [2022-11-19 08:02:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-19 08:02:28,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-19 08:02:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_check_media [2022-11-19 08:02:28,009 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_check_media [2022-11-19 08:02:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_get_regs_len [2022-11-19 08:02:28,009 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_get_regs_len [2022-11-19 08:02:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-19 08:02:28,010 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-19 08:02:28,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-19 08:02:28,010 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_poll_controller [2022-11-19 08:02:28,010 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_poll_controller [2022-11-19 08:02:28,010 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_free_ring [2022-11-19 08:02:28,011 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_free_ring [2022-11-19 08:02:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-19 08:02:28,011 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-19 08:02:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 08:02:28,011 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 08:02:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2022-11-19 08:02:28,012 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2022-11-19 08:02:28,012 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 08:02:28,012 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 08:02:28,012 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-19 08:02:28,012 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-19 08:02:28,012 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_gset [2022-11-19 08:02:28,013 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_gset [2022-11-19 08:02:28,013 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_rx_ring [2022-11-19 08:02:28,013 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_rx_ring [2022-11-19 08:02:28,013 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_csr [2022-11-19 08:02:28,013 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_csr [2022-11-19 08:02:28,014 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_tx_timeout [2022-11-19 08:02:28,014 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_tx_timeout [2022-11-19 08:02:28,014 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-19 08:02:28,014 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-19 08:02:28,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:02:28,015 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_stop [2022-11-19 08:02:28,015 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_stop [2022-11-19 08:02:28,015 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-19 08:02:28,015 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-19 08:02:28,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:02:28,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_pcnet32_private [2022-11-19 08:02:28,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_pcnet32_private [2022-11-19 08:02:28,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:02:28,016 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_csr [2022-11-19 08:02:28,016 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_csr [2022-11-19 08:02:28,016 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_set_multicast_list [2022-11-19 08:02:28,017 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_set_multicast_list [2022-11-19 08:02:28,017 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-19 08:02:28,017 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-19 08:02:28,017 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 08:02:28,017 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 08:02:28,018 INFO L130 BoogieDeclarations]: Found specification of procedure mii_link_ok [2022-11-19 08:02:28,018 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_link_ok [2022-11-19 08:02:28,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-19 08:02:28,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-19 08:02:28,018 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_probe1 [2022-11-19 08:02:28,019 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_probe1 [2022-11-19 08:02:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2022-11-19 08:02:28,019 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2022-11-19 08:02:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2022-11-19 08:02:28,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2022-11-19 08:02:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_remove_one [2022-11-19 08:02:28,020 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_remove_one [2022-11-19 08:02:28,020 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_sset [2022-11-19 08:02:28,020 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_sset [2022-11-19 08:02:28,020 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2022-11-19 08:02:28,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2022-11-19 08:02:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_bcr [2022-11-19 08:02:28,021 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_bcr [2022-11-19 08:02:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-19 08:02:28,021 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-19 08:02:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-19 08:02:28,022 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-19 08:02:28,022 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-19 08:02:28,022 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-19 08:02:28,022 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_bcr [2022-11-19 08:02:28,022 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_bcr [2022-11-19 08:02:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 08:02:28,023 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 08:02:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_init_ring [2022-11-19 08:02:28,023 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_init_ring [2022-11-19 08:02:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_close [2022-11-19 08:02:28,023 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_close [2022-11-19 08:02:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-19 08:02:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-19 08:02:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:02:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:02:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:02:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_suspend [2022-11-19 08:02:28,025 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_suspend [2022-11-19 08:02:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:02:28,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:02:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-19 08:02:28,026 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-19 08:02:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-19 08:02:28,026 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-19 08:02:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_csr [2022-11-19 08:02:28,026 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_csr [2022-11-19 08:02:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_load_multicast [2022-11-19 08:02:28,027 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_load_multicast [2022-11-19 08:02:28,027 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2022-11-19 08:02:28,027 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2022-11-19 08:02:28,027 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_nway_reset [2022-11-19 08:02:28,027 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_nway_reset [2022-11-19 08:02:28,028 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-19 08:02:28,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-19 08:02:28,028 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2022-11-19 08:02:28,028 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2022-11-19 08:02:28,028 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 08:02:28,028 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 08:02:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-19 08:02:28,029 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-19 08:02:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2022-11-19 08:02:28,029 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2022-11-19 08:02:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:02:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2022-11-19 08:02:28,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2022-11-19 08:02:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2022-11-19 08:02:28,030 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2022-11-19 08:02:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-19 08:02:28,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-19 08:02:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-19 08:02:28,031 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-19 08:02:29,291 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:02:29,298 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:02:29,554 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:02:39,920 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:02:42,464 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:02:42,464 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-19 08:02:42,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:42 BoogieIcfgContainer [2022-11-19 08:02:42,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:02:42,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:02:42,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:02:42,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:02:42,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:21" (1/3) ... [2022-11-19 08:02:42,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0bc899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:42, skipping insertion in model container [2022-11-19 08:02:42,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (2/3) ... [2022-11-19 08:02:42,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0bc899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:42, skipping insertion in model container [2022-11-19 08:02:42,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:42" (3/3) ... [2022-11-19 08:02:42,497 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2022-11-19 08:02:42,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:02:42,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-19 08:02:42,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:02:42,676 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;@6b0ee88c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:02:42,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-19 08:02:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 1803 states, 1037 states have (on average 1.2835101253616201) internal successors, (1331), 1102 states have internal predecessors, (1331), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) [2022-11-19 08:02:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:02:42,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:42,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-19 08:02:42,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:02:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash -360190615, now seen corresponding path program 1 times [2022-11-19 08:02:42,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:42,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131400291] [2022-11-19 08:02:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:42,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:02:43,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131400291] [2022-11-19 08:02:43,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131400291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:43,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:43,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:02:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24554431] [2022-11-19 08:02:43,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:02:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:02:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:44,027 INFO L87 Difference]: Start difference. First operand has 1803 states, 1037 states have (on average 1.2835101253616201) internal successors, (1331), 1102 states have internal predecessors, (1331), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:02:47,013 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 08:02:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:51,818 INFO L93 Difference]: Finished difference Result 5283 states and 7847 transitions. [2022-11-19 08:02:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:02:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-11-19 08:02:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:51,869 INFO L225 Difference]: With dead ends: 5283 [2022-11-19 08:02:51,869 INFO L226 Difference]: Without dead ends: 3475 [2022-11-19 08:02:51,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:02:51,899 INFO L413 NwaCegarLoop]: 3429 mSDtfsCounter, 2463 mSDsluCounter, 9094 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 12523 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:51,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2476 Valid, 12523 Invalid, 1617 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1613 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-19 08:02:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2022-11-19 08:02:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3468. [2022-11-19 08:02:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 1996 states have (on average 1.2740480961923848) internal successors, (2543), 2107 states have internal predecessors, (2543), 1236 states have call successors, (1236), 235 states have call predecessors, (1236), 233 states have return successors, (1236), 1193 states have call predecessors, (1236), 1230 states have call successors, (1236) [2022-11-19 08:02:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5015 transitions. [2022-11-19 08:02:52,294 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5015 transitions. Word has length 37 [2022-11-19 08:02:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:52,295 INFO L495 AbstractCegarLoop]: Abstraction has 3468 states and 5015 transitions. [2022-11-19 08:02:52,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:02:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5015 transitions. [2022-11-19 08:02:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 08:02:52,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:52,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:02:52,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:02:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash -505215138, now seen corresponding path program 1 times [2022-11-19 08:02:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:52,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076038406] [2022-11-19 08:02:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:02:52,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:52,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076038406] [2022-11-19 08:02:52,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076038406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:52,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:52,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:02:52,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143908638] [2022-11-19 08:02:52,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:02:52,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:02:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:52,884 INFO L87 Difference]: Start difference. First operand 3468 states and 5015 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:02:55,483 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 08:02:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:58,667 INFO L93 Difference]: Finished difference Result 4804 states and 6736 transitions. [2022-11-19 08:02:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:02:58,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-19 08:02:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:58,707 INFO L225 Difference]: With dead ends: 4804 [2022-11-19 08:02:58,707 INFO L226 Difference]: Without dead ends: 4802 [2022-11-19 08:02:58,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:02:58,714 INFO L413 NwaCegarLoop]: 2596 mSDtfsCounter, 1705 mSDsluCounter, 6824 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 9420 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:58,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 9420 Invalid, 1253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-19 08:02:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2022-11-19 08:02:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4798. [2022-11-19 08:02:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 2739 states have (on average 1.254107338444688) internal successors, (3435), 2884 states have internal predecessors, (3435), 1646 states have call successors, (1646), 410 states have call predecessors, (1646), 410 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-19 08:02:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6731 transitions. [2022-11-19 08:02:59,044 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6731 transitions. Word has length 42 [2022-11-19 08:02:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:59,045 INFO L495 AbstractCegarLoop]: Abstraction has 4798 states and 6731 transitions. [2022-11-19 08:02:59,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:02:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6731 transitions. [2022-11-19 08:02:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:02:59,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:59,059 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-19 08:02:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:02:59,062 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:02:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1765804471, now seen corresponding path program 1 times [2022-11-19 08:02:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:59,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576987797] [2022-11-19 08:02:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:02:59,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:59,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576987797] [2022-11-19 08:02:59,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576987797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:59,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:59,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:02:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902307168] [2022-11-19 08:02:59,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:59,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:02:59,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:02:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:59,895 INFO L87 Difference]: Start difference. First operand 4798 states and 6731 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:03:02,524 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 08:03:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:05,730 INFO L93 Difference]: Finished difference Result 4812 states and 6742 transitions. [2022-11-19 08:03:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2022-11-19 08:03:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:05,770 INFO L225 Difference]: With dead ends: 4812 [2022-11-19 08:03:05,771 INFO L226 Difference]: Without dead ends: 4810 [2022-11-19 08:03:05,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:05,777 INFO L413 NwaCegarLoop]: 2596 mSDtfsCounter, 1705 mSDsluCounter, 6824 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 9420 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:05,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 9420 Invalid, 1253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-19 08:03:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2022-11-19 08:03:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4806. [2022-11-19 08:03:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4806 states, 2745 states have (on average 1.2535519125683061) internal successors, (3441), 2890 states have internal predecessors, (3441), 1646 states have call successors, (1646), 412 states have call predecessors, (1646), 412 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-19 08:03:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 6737 transitions. [2022-11-19 08:03:06,134 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 6737 transitions. Word has length 47 [2022-11-19 08:03:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:06,135 INFO L495 AbstractCegarLoop]: Abstraction has 4806 states and 6737 transitions. [2022-11-19 08:03:06,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:03:06,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 6737 transitions. [2022-11-19 08:03:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 08:03:06,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:06,140 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:06,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:03:06,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 344330418, now seen corresponding path program 1 times [2022-11-19 08:03:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:06,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493581645] [2022-11-19 08:03:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:06,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:03:06,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493581645] [2022-11-19 08:03:06,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493581645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:06,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:06,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:06,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335333196] [2022-11-19 08:03:06,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:06,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:06,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:06,707 INFO L87 Difference]: Start difference. First operand 4806 states and 6737 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:03:09,319 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 08:03:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:12,479 INFO L93 Difference]: Finished difference Result 4820 states and 6748 transitions. [2022-11-19 08:03:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2022-11-19 08:03:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:12,524 INFO L225 Difference]: With dead ends: 4820 [2022-11-19 08:03:12,524 INFO L226 Difference]: Without dead ends: 4818 [2022-11-19 08:03:12,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:12,531 INFO L413 NwaCegarLoop]: 2602 mSDtfsCounter, 1700 mSDsluCounter, 6836 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 9438 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:12,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1711 Valid, 9438 Invalid, 1253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-19 08:03:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4818 states. [2022-11-19 08:03:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4818 to 4814. [2022-11-19 08:03:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4814 states, 2751 states have (on average 1.2529989094874592) internal successors, (3447), 2896 states have internal predecessors, (3447), 1646 states have call successors, (1646), 414 states have call predecessors, (1646), 414 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-19 08:03:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4814 states to 4814 states and 6743 transitions. [2022-11-19 08:03:12,887 INFO L78 Accepts]: Start accepts. Automaton has 4814 states and 6743 transitions. Word has length 59 [2022-11-19 08:03:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:12,888 INFO L495 AbstractCegarLoop]: Abstraction has 4814 states and 6743 transitions. [2022-11-19 08:03:12,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:03:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4814 states and 6743 transitions. [2022-11-19 08:03:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:03:12,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:12,891 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:03:12,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2100023541, now seen corresponding path program 1 times [2022-11-19 08:03:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:12,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341814256] [2022-11-19 08:03:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 08:03:13,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341814256] [2022-11-19 08:03:13,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341814256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:13,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:13,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753623419] [2022-11-19 08:03:13,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:13,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:13,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:13,434 INFO L87 Difference]: Start difference. First operand 4814 states and 6743 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 08:03:16,015 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 08:03:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:18,895 INFO L93 Difference]: Finished difference Result 4828 states and 6754 transitions. [2022-11-19 08:03:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:18,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 64 [2022-11-19 08:03:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:18,927 INFO L225 Difference]: With dead ends: 4828 [2022-11-19 08:03:18,928 INFO L226 Difference]: Without dead ends: 4826 [2022-11-19 08:03:18,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:18,934 INFO L413 NwaCegarLoop]: 2596 mSDtfsCounter, 1700 mSDsluCounter, 6824 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 9420 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:18,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 9420 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-19 08:03:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2022-11-19 08:03:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4822. [2022-11-19 08:03:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 2757 states have (on average 1.252448313384113) internal successors, (3453), 2902 states have internal predecessors, (3453), 1646 states have call successors, (1646), 416 states have call predecessors, (1646), 416 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-19 08:03:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 6749 transitions. [2022-11-19 08:03:19,295 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 6749 transitions. Word has length 64 [2022-11-19 08:03:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:19,296 INFO L495 AbstractCegarLoop]: Abstraction has 4822 states and 6749 transitions. [2022-11-19 08:03:19,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 08:03:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 6749 transitions. [2022-11-19 08:03:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:03:19,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:19,298 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:19,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:03:19,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash -930096558, now seen corresponding path program 1 times [2022-11-19 08:03:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:19,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635233541] [2022-11-19 08:03:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:19,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:03:19,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635233541] [2022-11-19 08:03:19,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635233541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:19,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586157377] [2022-11-19 08:03:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:19,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:19,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:19,810 INFO L87 Difference]: Start difference. First operand 4822 states and 6749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:03:22,470 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 08:03:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:25,526 INFO L93 Difference]: Finished difference Result 4836 states and 6760 transitions. [2022-11-19 08:03:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-19 08:03:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:25,560 INFO L225 Difference]: With dead ends: 4836 [2022-11-19 08:03:25,560 INFO L226 Difference]: Without dead ends: 4834 [2022-11-19 08:03:25,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:25,567 INFO L413 NwaCegarLoop]: 2596 mSDtfsCounter, 1700 mSDsluCounter, 6824 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 9420 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:25,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 9420 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-19 08:03:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2022-11-19 08:03:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4830. [2022-11-19 08:03:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4830 states, 2763 states have (on average 1.251900108577633) internal successors, (3459), 2908 states have internal predecessors, (3459), 1646 states have call successors, (1646), 418 states have call predecessors, (1646), 418 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-19 08:03:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 6755 transitions. [2022-11-19 08:03:25,933 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 6755 transitions. Word has length 69 [2022-11-19 08:03:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:25,934 INFO L495 AbstractCegarLoop]: Abstraction has 4830 states and 6755 transitions. [2022-11-19 08:03:25,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:03:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 6755 transitions. [2022-11-19 08:03:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:03:25,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:25,940 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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] [2022-11-19 08:03:25,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:03:25,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash 22958089, now seen corresponding path program 1 times [2022-11-19 08:03:25,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:25,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171760590] [2022-11-19 08:03:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:25,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 08:03:26,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171760590] [2022-11-19 08:03:26,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171760590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:26,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:26,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:26,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166561592] [2022-11-19 08:03:26,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:26,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:26,429 INFO L87 Difference]: Start difference. First operand 4830 states and 6755 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:03:29,042 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 08:03:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:31,846 INFO L93 Difference]: Finished difference Result 4844 states and 6766 transitions. [2022-11-19 08:03:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:31,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2022-11-19 08:03:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:31,877 INFO L225 Difference]: With dead ends: 4844 [2022-11-19 08:03:31,877 INFO L226 Difference]: Without dead ends: 4842 [2022-11-19 08:03:31,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:31,884 INFO L413 NwaCegarLoop]: 2602 mSDtfsCounter, 1705 mSDsluCounter, 6836 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 9438 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:31,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 9438 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-19 08:03:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2022-11-19 08:03:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 4838. [2022-11-19 08:03:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 2769 states have (on average 1.2513542795232937) internal successors, (3465), 2914 states have internal predecessors, (3465), 1646 states have call successors, (1646), 420 states have call predecessors, (1646), 420 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-19 08:03:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 6761 transitions. [2022-11-19 08:03:32,276 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 6761 transitions. Word has length 67 [2022-11-19 08:03:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:32,277 INFO L495 AbstractCegarLoop]: Abstraction has 4838 states and 6761 transitions. [2022-11-19 08:03:32,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:03:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 6761 transitions. [2022-11-19 08:03:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 08:03:32,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:32,281 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:32,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:03:32,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:32,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2028745742, now seen corresponding path program 1 times [2022-11-19 08:03:32,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:32,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804061556] [2022-11-19 08:03:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-19 08:03:32,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804061556] [2022-11-19 08:03:32,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804061556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:32,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:32,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:32,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180161552] [2022-11-19 08:03:32,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:32,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:32,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:32,804 INFO L87 Difference]: Start difference. First operand 4838 states and 6761 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:03:35,432 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 08:03:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:39,113 INFO L93 Difference]: Finished difference Result 6246 states and 8616 transitions. [2022-11-19 08:03:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:03:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 79 [2022-11-19 08:03:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:39,141 INFO L225 Difference]: With dead ends: 6246 [2022-11-19 08:03:39,141 INFO L226 Difference]: Without dead ends: 6244 [2022-11-19 08:03:39,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:39,149 INFO L413 NwaCegarLoop]: 2668 mSDtfsCounter, 1386 mSDsluCounter, 7444 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 10112 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:39,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 10112 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1336 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-19 08:03:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6244 states. [2022-11-19 08:03:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6244 to 6235. [2022-11-19 08:03:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6235 states, 3527 states have (on average 1.2486532463850297) internal successors, (4404), 3749 states have internal predecessors, (4404), 2090 states have call successors, (2090), 626 states have call predecessors, (2090), 615 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-19 08:03:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6235 states to 6235 states and 8607 transitions. [2022-11-19 08:03:39,713 INFO L78 Accepts]: Start accepts. Automaton has 6235 states and 8607 transitions. Word has length 79 [2022-11-19 08:03:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:39,713 INFO L495 AbstractCegarLoop]: Abstraction has 6235 states and 8607 transitions. [2022-11-19 08:03:39,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:03:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6235 states and 8607 transitions. [2022-11-19 08:03:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 08:03:39,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:39,716 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:39,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:03:39,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash 581270709, now seen corresponding path program 1 times [2022-11-19 08:03:39,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:39,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951920139] [2022-11-19 08:03:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:39,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-19 08:03:40,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:40,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951920139] [2022-11-19 08:03:40,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951920139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:40,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:40,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:40,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402875613] [2022-11-19 08:03:40,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:40,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:40,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:40,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:40,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:40,163 INFO L87 Difference]: Start difference. First operand 6235 states and 8607 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:03:42,822 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 08:03:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:45,843 INFO L93 Difference]: Finished difference Result 6253 states and 8622 transitions. [2022-11-19 08:03:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:45,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-11-19 08:03:45,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:45,870 INFO L225 Difference]: With dead ends: 6253 [2022-11-19 08:03:45,870 INFO L226 Difference]: Without dead ends: 6251 [2022-11-19 08:03:45,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:45,876 INFO L413 NwaCegarLoop]: 2584 mSDtfsCounter, 1700 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 9384 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:45,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1706 Valid, 9384 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-19 08:03:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2022-11-19 08:03:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 6247. [2022-11-19 08:03:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 3536 states have (on average 1.2480203619909502) internal successors, (4413), 3758 states have internal predecessors, (4413), 2090 states have call successors, (2090), 629 states have call predecessors, (2090), 618 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-19 08:03:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 8616 transitions. [2022-11-19 08:03:46,289 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 8616 transitions. Word has length 84 [2022-11-19 08:03:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:46,290 INFO L495 AbstractCegarLoop]: Abstraction has 6247 states and 8616 transitions. [2022-11-19 08:03:46,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:03:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 8616 transitions. [2022-11-19 08:03:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:03:46,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:46,292 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 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] [2022-11-19 08:03:46,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:03:46,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:46,298 INFO L85 PathProgramCache]: Analyzing trace with hash -428916258, now seen corresponding path program 1 times [2022-11-19 08:03:46,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:46,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868565643] [2022-11-19 08:03:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 08:03:46,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868565643] [2022-11-19 08:03:46,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868565643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:46,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:46,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421060122] [2022-11-19 08:03:46,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:46,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:46,656 INFO L87 Difference]: Start difference. First operand 6247 states and 8616 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:03:49,210 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 08:03:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:51,397 INFO L93 Difference]: Finished difference Result 6265 states and 8631 transitions. [2022-11-19 08:03:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-19 08:03:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:51,428 INFO L225 Difference]: With dead ends: 6265 [2022-11-19 08:03:51,428 INFO L226 Difference]: Without dead ends: 6263 [2022-11-19 08:03:51,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:51,434 INFO L413 NwaCegarLoop]: 2584 mSDtfsCounter, 1705 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 9384 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:51,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 9384 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-19 08:03:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2022-11-19 08:03:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6259. [2022-11-19 08:03:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6259 states, 3545 states have (on average 1.2473906911142454) internal successors, (4422), 3767 states have internal predecessors, (4422), 2090 states have call successors, (2090), 632 states have call predecessors, (2090), 621 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-19 08:03:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8625 transitions. [2022-11-19 08:03:51,934 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8625 transitions. Word has length 82 [2022-11-19 08:03:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:51,934 INFO L495 AbstractCegarLoop]: Abstraction has 6259 states and 8625 transitions. [2022-11-19 08:03:51,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:03:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8625 transitions. [2022-11-19 08:03:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 08:03:51,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:51,937 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 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] [2022-11-19 08:03:51,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:03:51,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1578961353, now seen corresponding path program 1 times [2022-11-19 08:03:51,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:51,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143613323] [2022-11-19 08:03:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:51,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-19 08:03:52,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143613323] [2022-11-19 08:03:52,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143613323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:52,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:52,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:52,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618492373] [2022-11-19 08:03:52,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:52,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:52,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:52,296 INFO L87 Difference]: Start difference. First operand 6259 states and 8625 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 08:03:54,859 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 08:03:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:57,483 INFO L93 Difference]: Finished difference Result 6277 states and 8640 transitions. [2022-11-19 08:03:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:57,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 87 [2022-11-19 08:03:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:57,517 INFO L225 Difference]: With dead ends: 6277 [2022-11-19 08:03:57,517 INFO L226 Difference]: Without dead ends: 6275 [2022-11-19 08:03:57,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:57,522 INFO L413 NwaCegarLoop]: 2584 mSDtfsCounter, 1705 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 9384 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:57,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 9384 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 08:03:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6275 states. [2022-11-19 08:03:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6275 to 6271. [2022-11-19 08:03:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 3554 states have (on average 1.246764209341587) internal successors, (4431), 3776 states have internal predecessors, (4431), 2090 states have call successors, (2090), 635 states have call predecessors, (2090), 624 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-19 08:03:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 8634 transitions. [2022-11-19 08:03:58,042 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 8634 transitions. Word has length 87 [2022-11-19 08:03:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:58,042 INFO L495 AbstractCegarLoop]: Abstraction has 6271 states and 8634 transitions. [2022-11-19 08:03:58,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 08:03:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 8634 transitions. [2022-11-19 08:03:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 08:03:58,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:58,046 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:03:58,046 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:03:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2111974886, now seen corresponding path program 1 times [2022-11-19 08:03:58,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:58,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048248108] [2022-11-19 08:03:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:58,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:03:58,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:58,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048248108] [2022-11-19 08:03:58,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048248108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:58,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:58,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:03:58,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250749294] [2022-11-19 08:03:58,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:58,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:58,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:58,855 INFO L87 Difference]: Start difference. First operand 6271 states and 8634 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:04:01,351 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 08:04:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:03,783 INFO L93 Difference]: Finished difference Result 6290 states and 8649 transitions. [2022-11-19 08:04:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:04:03,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 109 [2022-11-19 08:04:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:03,816 INFO L225 Difference]: With dead ends: 6290 [2022-11-19 08:04:03,816 INFO L226 Difference]: Without dead ends: 6288 [2022-11-19 08:04:03,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:03,822 INFO L413 NwaCegarLoop]: 2667 mSDtfsCounter, 1384 mSDsluCounter, 7460 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 10127 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:03,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 10127 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1328 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-19 08:04:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6288 states. [2022-11-19 08:04:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6288 to 6279. [2022-11-19 08:04:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6279 states, 3560 states have (on average 1.2457865168539326) internal successors, (4435), 3782 states have internal predecessors, (4435), 2090 states have call successors, (2090), 637 states have call predecessors, (2090), 626 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-19 08:04:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6279 states to 6279 states and 8638 transitions. [2022-11-19 08:04:04,371 INFO L78 Accepts]: Start accepts. Automaton has 6279 states and 8638 transitions. Word has length 109 [2022-11-19 08:04:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:04,374 INFO L495 AbstractCegarLoop]: Abstraction has 6279 states and 8638 transitions. [2022-11-19 08:04:04,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:04:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6279 states and 8638 transitions. [2022-11-19 08:04:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 08:04:04,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:04,380 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:04:04,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:04:04,381 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:04:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -540924110, now seen corresponding path program 1 times [2022-11-19 08:04:04,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:04,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590027996] [2022-11-19 08:04:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:04,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-19 08:04:04,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:04,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590027996] [2022-11-19 08:04:04,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590027996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:04,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:04,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:04:04,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868455092] [2022-11-19 08:04:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:04:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:04:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:04,809 INFO L87 Difference]: Start difference. First operand 6279 states and 8638 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 08:04:07,399 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 08:04:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:09,718 INFO L93 Difference]: Finished difference Result 6297 states and 8653 transitions. [2022-11-19 08:04:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:09,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-19 08:04:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:09,806 INFO L225 Difference]: With dead ends: 6297 [2022-11-19 08:04:09,806 INFO L226 Difference]: Without dead ends: 6293 [2022-11-19 08:04:09,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:09,809 INFO L413 NwaCegarLoop]: 2586 mSDtfsCounter, 1700 mSDsluCounter, 6804 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 9390 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:09,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1703 Valid, 9390 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 08:04:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2022-11-19 08:04:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 6289. [2022-11-19 08:04:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 3568 states have (on average 1.2449551569506727) internal successors, (4442), 3789 states have internal predecessors, (4442), 2090 states have call successors, (2090), 640 states have call predecessors, (2090), 628 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-19 08:04:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 8645 transitions. [2022-11-19 08:04:10,285 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 8645 transitions. Word has length 99 [2022-11-19 08:04:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:10,286 INFO L495 AbstractCegarLoop]: Abstraction has 6289 states and 8645 transitions. [2022-11-19 08:04:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 08:04:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 8645 transitions. [2022-11-19 08:04:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 08:04:10,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:10,289 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 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] [2022-11-19 08:04:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:04:10,290 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:04:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash -643986775, now seen corresponding path program 1 times [2022-11-19 08:04:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061567895] [2022-11-19 08:04:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-19 08:04:10,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:10,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061567895] [2022-11-19 08:04:10,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061567895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:10,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:10,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:04:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743567161] [2022-11-19 08:04:10,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:10,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:04:10,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:04:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:10,660 INFO L87 Difference]: Start difference. First operand 6289 states and 8645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 08:04:13,250 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 08:04:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:16,024 INFO L93 Difference]: Finished difference Result 6303 states and 8656 transitions. [2022-11-19 08:04:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 97 [2022-11-19 08:04:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:16,052 INFO L225 Difference]: With dead ends: 6303 [2022-11-19 08:04:16,053 INFO L226 Difference]: Without dead ends: 6148 [2022-11-19 08:04:16,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:16,059 INFO L413 NwaCegarLoop]: 2587 mSDtfsCounter, 1705 mSDsluCounter, 6806 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 9393 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:16,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 9393 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1248 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 08:04:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2022-11-19 08:04:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 6144. [2022-11-19 08:04:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6144 states, 3484 states have (on average 1.25) internal successors, (4355), 3703 states have internal predecessors, (4355), 2057 states have call successors, (2057), 611 states have call predecessors, (2057), 600 states have return successors, (2083), 1937 states have call predecessors, (2083), 2051 states have call successors, (2083) [2022-11-19 08:04:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6144 states to 6144 states and 8495 transitions. [2022-11-19 08:04:16,671 INFO L78 Accepts]: Start accepts. Automaton has 6144 states and 8495 transitions. Word has length 97 [2022-11-19 08:04:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:16,671 INFO L495 AbstractCegarLoop]: Abstraction has 6144 states and 8495 transitions. [2022-11-19 08:04:16,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 08:04:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6144 states and 8495 transitions. [2022-11-19 08:04:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 08:04:16,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:16,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 08:04:16,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:04:16,677 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:04:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash -393633121, now seen corresponding path program 1 times [2022-11-19 08:04:16,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:16,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094443549] [2022-11-19 08:04:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:16,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 08:04:17,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094443549] [2022-11-19 08:04:17,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094443549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:17,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:17,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:04:17,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328730556] [2022-11-19 08:04:17,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:17,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:04:17,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:04:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:17,429 INFO L87 Difference]: Start difference. First operand 6144 states and 8495 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 08:04:20,076 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 08:04:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:22,388 INFO L93 Difference]: Finished difference Result 6454 states and 8833 transitions. [2022-11-19 08:04:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-11-19 08:04:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:22,418 INFO L225 Difference]: With dead ends: 6454 [2022-11-19 08:04:22,418 INFO L226 Difference]: Without dead ends: 6340 [2022-11-19 08:04:22,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:04:22,423 INFO L413 NwaCegarLoop]: 2412 mSDtfsCounter, 1330 mSDsluCounter, 6085 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 8497 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:22,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 8497 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1319 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 08:04:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2022-11-19 08:04:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6340. [2022-11-19 08:04:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 3573 states have (on average 1.241253848306745) internal successors, (4435), 3793 states have internal predecessors, (4435), 2092 states have call successors, (2092), 683 states have call predecessors, (2092), 672 states have return successors, (2118), 1970 states have call predecessors, (2118), 2086 states have call successors, (2118) [2022-11-19 08:04:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 8645 transitions. [2022-11-19 08:04:22,973 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 8645 transitions. Word has length 146 [2022-11-19 08:04:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:22,974 INFO L495 AbstractCegarLoop]: Abstraction has 6340 states and 8645 transitions. [2022-11-19 08:04:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 08:04:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 8645 transitions. [2022-11-19 08:04:22,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-19 08:04:22,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:22,988 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 08:04:22,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:04:22,988 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:04:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash -680222009, now seen corresponding path program 1 times [2022-11-19 08:04:22,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097852374] [2022-11-19 08:04:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:22,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 08:04:23,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097852374] [2022-11-19 08:04:23,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097852374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:23,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:23,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:23,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036595018] [2022-11-19 08:04:23,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:23,521 INFO L87 Difference]: Start difference. First operand 6340 states and 8645 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-19 08:04:26,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:28,622 WARN L539 Checker$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 08:04:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:29,031 INFO L93 Difference]: Finished difference Result 10739 states and 14588 transitions. [2022-11-19 08:04:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 268 [2022-11-19 08:04:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:29,062 INFO L225 Difference]: With dead ends: 10739 [2022-11-19 08:04:29,062 INFO L226 Difference]: Without dead ends: 6286 [2022-11-19 08:04:29,088 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 08:04:29,089 INFO L413 NwaCegarLoop]: 2497 mSDtfsCounter, 1683 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 4149 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:29,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1684 Valid, 4149 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 561 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 08:04:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2022-11-19 08:04:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 6284. [2022-11-19 08:04:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6284 states, 3538 states have (on average 1.2394007914075749) internal successors, (4385), 3752 states have internal predecessors, (4385), 2071 states have call successors, (2071), 683 states have call predecessors, (2071), 672 states have return successors, (2088), 1952 states have call predecessors, (2088), 2065 states have call successors, (2088) [2022-11-19 08:04:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6284 states to 6284 states and 8544 transitions. [2022-11-19 08:04:29,740 INFO L78 Accepts]: Start accepts. Automaton has 6284 states and 8544 transitions. Word has length 268 [2022-11-19 08:04:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:29,740 INFO L495 AbstractCegarLoop]: Abstraction has 6284 states and 8544 transitions. [2022-11-19 08:04:29,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-19 08:04:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6284 states and 8544 transitions. [2022-11-19 08:04:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-19 08:04:29,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:29,754 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 08:04:29,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:04:29,754 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:04:29,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:29,755 INFO L85 PathProgramCache]: Analyzing trace with hash 132463748, now seen corresponding path program 1 times [2022-11-19 08:04:29,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:29,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498229266] [2022-11-19 08:04:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:29,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-11-19 08:04:31,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:31,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498229266] [2022-11-19 08:04:31,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498229266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:31,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140802950] [2022-11-19 08:04:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:31,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:31,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:31,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:04:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 4664 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:04:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-19 08:04:33,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:33,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140802950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:33,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:04:33,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-19 08:04:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056449539] [2022-11-19 08:04:33,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:33,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:33,872 INFO L87 Difference]: Start difference. First operand 6284 states and 8544 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-19 08:04:36,622 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 08:04:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:38,262 INFO L93 Difference]: Finished difference Result 12580 states and 17122 transitions. [2022-11-19 08:04:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 314 [2022-11-19 08:04:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:38,288 INFO L225 Difference]: With dead ends: 12580 [2022-11-19 08:04:38,288 INFO L226 Difference]: Without dead ends: 6310 [2022-11-19 08:04:38,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:38,328 INFO L413 NwaCegarLoop]: 2212 mSDtfsCounter, 7 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4409 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:38,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4409 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 665 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-19 08:04:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2022-11-19 08:04:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 6292. [2022-11-19 08:04:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 3546 states have (on average 1.2388606880992667) internal successors, (4393), 3760 states have internal predecessors, (4393), 2071 states have call successors, (2071), 683 states have call predecessors, (2071), 672 states have return successors, (2088), 1952 states have call predecessors, (2088), 2065 states have call successors, (2088) [2022-11-19 08:04:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 8552 transitions. [2022-11-19 08:04:39,024 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 8552 transitions. Word has length 314 [2022-11-19 08:04:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:39,026 INFO L495 AbstractCegarLoop]: Abstraction has 6292 states and 8552 transitions. [2022-11-19 08:04:39,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-19 08:04:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 8552 transitions. [2022-11-19 08:04:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-11-19 08:04:39,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:39,041 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 08:04:39,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:04:39,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 08:04:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1552514501, now seen corresponding path program 1 times [2022-11-19 08:04:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949719607] [2022-11-19 08:04:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2022-11-19 08:04:41,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:41,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949719607] [2022-11-19 08:04:41,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949719607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827056464] [2022-11-19 08:04:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:41,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:41,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:41,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:41,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f30b8e53-bce5-444d-aadf-edb2f5448c39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:04:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 4802 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:04:43,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:43,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-19 08:04:43,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827056464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280051754] [2022-11-19 08:04:44,058 INFO L159 IcfgInterpreter]: Started Sifa with 199 locations of interest [2022-11-19 08:04:44,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:44,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:44,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:44,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:11,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:05:11,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:13,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:13,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:13,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:13,616 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:05:13,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 702 treesize of output 702 [2022-11-19 08:05:13,770 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 08:05:13,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 707 treesize of output 705 [2022-11-19 08:05:21,052 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_xmalloc with input of size 193 for LOIs [2022-11-19 08:05:21,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:21,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:21,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:21,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:21,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:21,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:21,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:21,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:22,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:22,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:22,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:22,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:22,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:22,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:22,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:23,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:23,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:23,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:23,236 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_err with input of size 205 for LOIs [2022-11-19 08:05:23,256 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_assume with input of size 184 for LOIs [2022-11-19 08:05:23,287 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undef_int with input of size 2440 for LOIs [2022-11-19 08:05:28,790 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:07:11,442 WARN L233 SmtUtils]: Spent 1.70m on a formula simplification. DAG size of input: 2562 DAG size of output: 2542 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:08:42,006 WARN L233 SmtUtils]: Spent 1.50m on a formula simplification. DAG size of input: 2440 DAG size of output: 2418 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:10:13,035 WARN L233 SmtUtils]: Spent 1.50m on a formula simplification. DAG size of input: 2447 DAG size of output: 2426 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:10:43,973 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 546 DAG size of output: 351 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:10:50,670 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 583 DAG size of output: 386 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:10:50,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1280051754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:50,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:10:50,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [7, 7] total 34 [2022-11-19 08:10:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938934196] [2022-11-19 08:10:50,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:50,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:10:50,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:50,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:10:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:10:50,758 INFO L87 Difference]: Start difference. First operand 6292 states and 8552 transitions. Second operand has 24 states, 14 states have (on average 8.785714285714286) internal successors, (123), 13 states have internal predecessors, (123), 7 states have call successors, (55), 5 states have call predecessors, (55), 5 states have return successors, (51), 7 states have call predecessors, (51), 7 states have call successors, (51) [2022-11-19 08:12:45,303 WARN L233 SmtUtils]: Spent 1.89m on a formula simplification. DAG size of input: 2622 DAG size of output: 2555 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:14:36,394 WARN L233 SmtUtils]: Spent 1.84m on a formula simplification. DAG size of input: 2622 DAG size of output: 2555 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)