./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta --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 a900a56caf1252bf2b77371f0836914c913e44b231203ecd4eebd687a96fd0c2 --- 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-dbf71c6-m [2022-10-17 17:17:18,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:17:18,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:17:18,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:17:18,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:17:18,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:17:18,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:17:18,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:17:18,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:17:18,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:17:18,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:17:18,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:17:18,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:17:18,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:17:18,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:17:18,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:17:18,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:17:18,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:17:18,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:17:18,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:17:18,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:17:18,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:17:18,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:17:18,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:17:18,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:17:18,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:17:18,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:17:18,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:17:18,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:17:18,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:17:18,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:17:18,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:17:18,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:17:18,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:17:18,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:17:18,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:17:18,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:17:18,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:17:18,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:17:18,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:17:18,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:17:18,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:17:18,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:17:18,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:17:18,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:17:18,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:17:18,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:17:18,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:17:18,257 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:17:18,257 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:17:18,257 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:17:18,258 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:17:18,258 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:17:18,258 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:17:18,258 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:17:18,259 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:17:18,259 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:17:18,259 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:17:18,259 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:17:18,259 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:17:18,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:17:18,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:17:18,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:17:18,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:17:18,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:17:18,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:17:18,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:17:18,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:17:18,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:17:18,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:17:18,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:17:18,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:18,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:17:18,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:17:18,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:17:18,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:17:18,269 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:17:18,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:17:18,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:17:18,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:17:18,271 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_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a900a56caf1252bf2b77371f0836914c913e44b231203ecd4eebd687a96fd0c2 [2022-10-17 17:17:18,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:17:18,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:17:18,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:17:18,580 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:17:18,581 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:17:18,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2022-10-17 17:17:18,668 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/data/1270e60ed/a988b5f41b50490090cb7d724bef4a01/FLAG7147b7cc3 [2022-10-17 17:17:19,617 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:17:19,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2022-10-17 17:17:19,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/data/1270e60ed/a988b5f41b50490090cb7d724bef4a01/FLAG7147b7cc3 [2022-10-17 17:17:19,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/data/1270e60ed/a988b5f41b50490090cb7d724bef4a01 [2022-10-17 17:17:19,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:17:19,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:17:19,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:19,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:17:19,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:17:19,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df5ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19, skipping insertion in model container [2022-10-17 17:17:19,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:20,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:17:20,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:17:20,916 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [5986] [2022-10-17 17:17:20,917 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [5987-5988] [2022-10-17 17:17:21,654 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[188410,188423] [2022-10-17 17:17:23,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:23,059 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:17:23,218 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [5986] [2022-10-17 17:17:23,218 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [5987-5988] [2022-10-17 17:17:23,238 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[188410,188423] [2022-10-17 17:17:23,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:23,793 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:17:23,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23 WrapperNode [2022-10-17 17:17:23,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:23,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:23,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:17:23,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:17:23,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:23,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,126 INFO L138 Inliner]: procedures = 350, calls = 2000, calls flagged for inlining = 171, calls inlined = 139, statements flattened = 4723 [2022-10-17 17:17:24,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:24,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:17:24,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:17:24,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:17:24,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,402 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:17:24,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:17:24,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:17:24,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:17:24,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (1/1) ... [2022-10-17 17:17:24,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:24,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:17:24,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fb0ed6-b205-48c1-9746-b57aeeb61e9a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:17:24,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:17:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure get_page [2022-10-17 17:17:24,559 INFO L138 BoogieDeclarations]: Found implementation of procedure get_page [2022-10-17 17:17:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:17:24,560 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_release_tx_bufs [2022-10-17 17:17:24,560 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_release_tx_bufs [2022-10-17 17:17:24,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:17:24,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:17:24,560 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2022-10-17 17:17:24,561 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2022-10-17 17:17:24,561 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2022-10-17 17:17:24,561 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2022-10-17 17:17:24,561 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_change_mtu [2022-10-17 17:17:24,561 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_change_mtu [2022-10-17 17:17:24,561 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-10-17 17:17:24,562 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-10-17 17:17:24,562 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_write [2022-10-17 17:17:24,562 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_write [2022-10-17 17:17:24,562 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-10-17 17:17:24,562 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-10-17 17:17:24,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-10-17 17:17:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-10-17 17:17:24,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:17:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:17:24,563 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-10-17 17:17:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-10-17 17:17:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_update_begin [2022-10-17 17:17:24,564 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_update_begin [2022-10-17 17:17:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure bind_evtchn_to_irqhandler [2022-10-17 17:17:24,565 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_evtchn_to_irqhandler [2022-10-17 17:17:24,565 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2022-10-17 17:17:24,565 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2022-10-17 17:17:24,565 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_remove [2022-10-17 17:17:24,566 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_remove [2022-10-17 17:17:24,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:17:24,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:17:24,566 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2022-10-17 17:17:24,566 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2022-10-17 17:17:24,566 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-10-17 17:17:24,567 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-10-17 17:17:24,567 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_grant_ring [2022-10-17 17:17:24,567 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_grant_ring [2022-10-17 17:17:24,568 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-10-17 17:17:24,569 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-10-17 17:17:24,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:17:24,570 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:17:24,570 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_claim_grant_reference [2022-10-17 17:17:24,570 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_claim_grant_reference [2022-10-17 17:17:24,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:17:24,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:17:24,571 INFO L130 BoogieDeclarations]: Found specification of procedure netif_set_real_num_tx_queues [2022-10-17 17:17:24,571 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_set_real_num_tx_queues [2022-10-17 17:17:24,571 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access [2022-10-17 17:17:24,571 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access [2022-10-17 17:17:24,571 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_disconnect_backend [2022-10-17 17:17:24,572 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_disconnect_backend [2022-10-17 17:17:24,572 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_stats64 [2022-10-17 17:17:24,572 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_stats64 [2022-10-17 17:17:24,573 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-10-17 17:17:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-10-17 17:17:24,573 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_alloc_evtchn [2022-10-17 17:17:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_alloc_evtchn [2022-10-17 17:17:24,573 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-10-17 17:17:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-10-17 17:17:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_alloc_grant_references [2022-10-17 17:17:24,574 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_alloc_grant_references [2022-10-17 17:17:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:17:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure netfront_tx_slot_available [2022-10-17 17:17:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure netfront_tx_slot_available [2022-10-17 17:17:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure notify_remote_via_irq [2022-10-17 17:17:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure notify_remote_via_irq [2022-10-17 17:17:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_release_grant_reference [2022-10-17 17:17:24,576 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_release_grant_reference [2022-10-17 17:17:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-10-17 17:17:24,576 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-10-17 17:17:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_can_sg [2022-10-17 17:17:24,577 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_can_sg [2022-10-17 17:17:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:17:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-10-17 17:17:24,577 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-10-17 17:17:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-10-17 17:17:24,578 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-10-17 17:17:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-10-17 17:17:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-10-17 17:17:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2022-10-17 17:17:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_tail [2022-10-17 17:17:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_tail [2022-10-17 17:17:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rxidx [2022-10-17 17:17:24,581 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rxidx [2022-10-17 17:17:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-10-17 17:17:24,581 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-10-17 17:17:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:17:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-10-17 17:17:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-10-17 17:17:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:17:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure write_queue_xenstore_keys [2022-10-17 17:17:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure write_queue_xenstore_keys [2022-10-17 17:17:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure pfn_to_mfn [2022-10-17 17:17:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure pfn_to_mfn [2022-10-17 17:17:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2022-10-17 17:17:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2022-10-17 17:17:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure add_id_to_freelist [2022-10-17 17:17:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure add_id_to_freelist [2022-10-17 17:17:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_alloc_rx_buffers [2022-10-17 17:17:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_alloc_rx_buffers [2022-10-17 17:17:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure skb_entry_set_link [2022-10-17 17:17:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_entry_set_link [2022-10-17 17:17:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-10-17 17:17:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-10-17 17:17:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-10-17 17:17:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-10-17 17:17:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-10-17 17:17:24,592 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-10-17 17:17:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure free_pages [2022-10-17 17:17:24,592 INFO L138 BoogieDeclarations]: Found implementation of procedure free_pages [2022-10-17 17:17:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access_ref [2022-10-17 17:17:24,599 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access_ref [2022-10-17 17:17:24,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:17:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 17:17:24,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 17:17:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2022-10-17 17:17:24,600 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2022-10-17 17:17:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_free_grant_references [2022-10-17 17:17:24,600 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_free_grant_references [2022-10-17 17:17:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2022-10-17 17:17:24,601 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2022-10-17 17:17:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-10-17 17:17:24,601 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-10-17 17:17:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-10-17 17:17:24,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-10-17 17:17:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:17:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2022-10-17 17:17:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2022-10-17 17:17:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure get_zeroed_page [2022-10-17 17:17:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure get_zeroed_page [2022-10-17 17:17:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure netback_changed [2022-10-17 17:17:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure netback_changed [2022-10-17 17:17:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_poll_controller [2022-10-17 17:17:24,603 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_poll_controller [2022-10-17 17:17:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2022-10-17 17:17:24,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2022-10-17 17:17:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:17:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-10-17 17:17:24,603 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-10-17 17:17:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-10-17 17:17:24,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-10-17 17:17:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2022-10-17 17:17:24,604 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2022-10-17 17:17:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-17 17:17:24,604 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-17 17:17:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_select_queue [2022-10-17 17:17:24,605 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_select_queue [2022-10-17 17:17:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_end_access [2022-10-17 17:17:24,605 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_end_access [2022-10-17 17:17:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure skb_get [2022-10-17 17:17:24,605 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_get [2022-10-17 17:17:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-10-17 17:17:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-10-17 17:17:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-10-17 17:17:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-10-17 17:17:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_rx_ref [2022-10-17 17:17:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_rx_ref [2022-10-17 17:17:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 17:17:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 17:17:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2022-10-17 17:17:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2022-10-17 17:17:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure skb_add_rx_frag [2022-10-17 17:17:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_add_rx_frag [2022-10-17 17:17:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:17:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2022-10-17 17:17:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2022-10-17 17:17:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-10-17 17:17:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-10-17 17:17:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 17:17:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 17:17:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure get_id_from_freelist [2022-10-17 17:17:24,609 INFO L138 BoogieDeclarations]: Found implementation of procedure get_id_from_freelist [2022-10-17 17:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2022-10-17 17:17:24,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2022-10-17 17:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_fix_features [2022-10-17 17:17:24,609 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_fix_features [2022-10-17 17:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:17:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-10-17 17:17:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-10-17 17:17:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:17:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-10-17 17:17:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-10-17 17:17:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2022-10-17 17:17:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2022-10-17 17:17:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:17:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-10-17 17:17:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-10-17 17:17:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2022-10-17 17:17:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2022-10-17 17:17:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-10-17 17:17:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-10-17 17:17:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2022-10-17 17:17:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2022-10-17 17:17:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2022-10-17 17:17:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2022-10-17 17:17:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2022-10-17 17:17:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2022-10-17 17:17:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-10-17 17:17:24,613 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-10-17 17:17:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2022-10-17 17:17:24,613 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2022-10-17 17:17:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_grant_foreign_access_ref [2022-10-17 17:17:24,613 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_grant_foreign_access_ref [2022-10-17 17:17:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-10-17 17:17:24,614 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-10-17 17:17:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_set_features [2022-10-17 17:17:24,614 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_set_features [2022-10-17 17:17:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2022-10-17 17:17:24,614 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2022-10-17 17:17:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-10-17 17:17:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-10-17 17:17:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:17:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-10-17 17:17:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-10-17 17:17:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-10-17 17:17:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-10-17 17:17:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_free_evtchn [2022-10-17 17:17:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_free_evtchn [2022-10-17 17:17:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_rx_skb [2022-10-17 17:17:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_rx_skb [2022-10-17 17:17:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:17:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:17:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_buf_gc [2022-10-17 17:17:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_buf_gc [2022-10-17 17:17:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-10-17 17:17:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-10-17 17:17:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-10-17 17:17:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-10-17 17:17:25,591 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:17:25,603 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:17:26,715 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:17:35,667 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:17:36,873 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:17:36,873 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:17:36,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:36 BoogieIcfgContainer [2022-10-17 17:17:36,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:17:36,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:17:36,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:17:36,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:17:36,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:17:19" (1/3) ... [2022-10-17 17:17:36,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248a2bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:36, skipping insertion in model container [2022-10-17 17:17:36,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:23" (2/3) ... [2022-10-17 17:17:36,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248a2bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:36, skipping insertion in model container [2022-10-17 17:17:36,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:36" (3/3) ... [2022-10-17 17:17:36,893 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2022-10-17 17:17:36,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:17:36,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:17:37,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:17:37,031 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;@6f347e1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:17:37,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:17:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 1232 states, 756 states have (on average 1.3267195767195767) internal successors, (1003), 786 states have internal predecessors, (1003), 367 states have call successors, (367), 108 states have call predecessors, (367), 107 states have return successors, (362), 360 states have call predecessors, (362), 362 states have call successors, (362) [2022-10-17 17:17:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-10-17 17:17:37,090 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:37,091 INFO L195 NwaCegarLoop]: trace histogram [9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:37,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1663474472, now seen corresponding path program 1 times [2022-10-17 17:17:37,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:37,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677861686] [2022-10-17 17:17:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-10-17 17:17:38,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677861686] [2022-10-17 17:17:38,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677861686] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:38,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:38,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:38,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820232542] [2022-10-17 17:17:38,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:38,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:38,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:38,211 INFO L87 Difference]: Start difference. First operand has 1232 states, 756 states have (on average 1.3267195767195767) internal successors, (1003), 786 states have internal predecessors, (1003), 367 states have call successors, (367), 108 states have call predecessors, (367), 107 states have return successors, (362), 360 states have call predecessors, (362), 362 states have call successors, (362) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-10-17 17:17:41,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:43,381 INFO L93 Difference]: Finished difference Result 3181 states and 4474 transitions. [2022-10-17 17:17:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:43,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 128 [2022-10-17 17:17:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:43,421 INFO L225 Difference]: With dead ends: 3181 [2022-10-17 17:17:43,422 INFO L226 Difference]: Without dead ends: 1935 [2022-10-17 17:17:43,439 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 [2022-10-17 17:17:43,442 INFO L413 NwaCegarLoop]: 1726 mSDtfsCounter, 1058 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:43,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 3171 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 476 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-10-17 17:17:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2022-10-17 17:17:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1932. [2022-10-17 17:17:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1181 states have (on average 1.3031329381879764) internal successors, (1539), 1218 states have internal predecessors, (1539), 573 states have call successors, (573), 178 states have call predecessors, (573), 177 states have return successors, (572), 569 states have call predecessors, (572), 572 states have call successors, (572) [2022-10-17 17:17:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2684 transitions. [2022-10-17 17:17:43,649 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2684 transitions. Word has length 128 [2022-10-17 17:17:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:43,650 INFO L495 AbstractCegarLoop]: Abstraction has 1932 states and 2684 transitions. [2022-10-17 17:17:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-10-17 17:17:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2684 transitions. [2022-10-17 17:17:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-10-17 17:17:43,661 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:43,662 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:17:43,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1764188021, now seen corresponding path program 1 times [2022-10-17 17:17:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:43,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011641728] [2022-10-17 17:17:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-10-17 17:17:44,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:44,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011641728] [2022-10-17 17:17:44,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011641728] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:44,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115888650] [2022-10-17 17:17:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:44,051 INFO L87 Difference]: Start difference. First operand 1932 states and 2684 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-10-17 17:17:48,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []