./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.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_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/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_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/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_07a625cc-4acb-41bf-b835-7f4f9854c905/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 c63ca5a13217ab3c82769d6ebc8e69dd180f3b7d25df235b9ae7098d5fa1543b --- 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 17:37:58,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:58,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:58,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:58,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:58,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:58,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:58,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:58,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:58,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:58,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:58,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:58,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:58,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:58,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:58,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:58,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:58,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:58,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:58,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:58,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:58,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:58,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:58,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:58,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:58,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:58,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:58,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:58,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:58,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:58,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:58,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:58,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:58,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:58,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:58,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:58,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:58,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:58,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:58,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:58,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:58,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:37:58,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:58,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:58,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:58,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:58,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:58,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:58,277 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:58,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:58,278 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:58,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:58,280 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:58,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:58,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:58,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:58,281 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:58,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:58,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:58,281 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:58,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:58,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:58,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:58,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:37:58,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:58,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:37:58,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:37:58,286 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:58,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:37:58,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:58,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:58,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:58,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:58,287 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:58,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:58,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:37:58,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:58,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:58,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:37:58,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:58,290 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_07a625cc-4acb-41bf-b835-7f4f9854c905/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c63ca5a13217ab3c82769d6ebc8e69dd180f3b7d25df235b9ae7098d5fa1543b [2022-10-17 17:37:58,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:58,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:58,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:58,594 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:58,595 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:58,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2022-10-17 17:37:58,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/data/e4eccac7c/7e8555ae0d654a5599cd6a61fbd8d326/FLAGa42ab296a [2022-10-17 17:37:59,616 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:59,616 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2022-10-17 17:37:59,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/data/e4eccac7c/7e8555ae0d654a5599cd6a61fbd8d326/FLAGa42ab296a [2022-10-17 17:38:00,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/data/e4eccac7c/7e8555ae0d654a5599cd6a61fbd8d326 [2022-10-17 17:38:00,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:00,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:00,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:00,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:00,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:00,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ae7056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00, skipping insertion in model container [2022-10-17 17:38:00,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:00,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:01,859 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_07a625cc-4acb-41bf-b835-7f4f9854c905/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i[198983,198996] [2022-10-17 17:38:01,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:01,977 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:02,530 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_07a625cc-4acb-41bf-b835-7f4f9854c905/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i[198983,198996] [2022-10-17 17:38:02,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:02,660 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:02,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02 WrapperNode [2022-10-17 17:38:02,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:02,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:02,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:02,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:02,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:02,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:02,923 INFO L138 Inliner]: procedures = 244, calls = 1516, calls flagged for inlining = 92, calls inlined = 80, statements flattened = 2942 [2022-10-17 17:38:02,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:02,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:02,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:02,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:02,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:02,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:02,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:02,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:03,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:03,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:03,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:03,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:03,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:03,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:03,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:03,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:03,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (1/1) ... [2022-10-17 17:38:03,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:03,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:03,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-10-17 17:38:03,318 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-10-17 17:38:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2022-10-17 17:38:03,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2022-10-17 17:38:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2022-10-17 17:38:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-10-17 17:38:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-10-17 17:38:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2022-10-17 17:38:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2022-10-17 17:38:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_compat_ioctl [2022-10-17 17:38:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_compat_ioctl [2022-10-17 17:38:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:38:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:38:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:38:03,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:38:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-10-17 17:38:03,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-10-17 17:38:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_read [2022-10-17 17:38:03,321 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_read [2022-10-17 17:38:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_compat_ioctl [2022-10-17 17:38:03,321 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_compat_ioctl [2022-10-17 17:38:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-10-17 17:38:03,321 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-10-17 17:38:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:38:03,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:38:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_release [2022-10-17 17:38:03,322 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_release [2022-10-17 17:38:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_open [2022-10-17 17:38:03,322 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_open [2022-10-17 17:38:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2022-10-17 17:38:03,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2022-10-17 17:38:03,323 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_get [2022-10-17 17:38:03,323 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_get [2022-10-17 17:38:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure __vfio_group_unset_container [2022-10-17 17:38:03,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __vfio_group_unset_container [2022-10-17 17:38:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_fops_unl_ioctl [2022-10-17 17:38:03,324 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_fops_unl_ioctl [2022-10-17 17:38:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-10-17 17:38:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-10-17 17:38:03,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:38:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:38:03,325 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_compat_ioctl [2022-10-17 17:38:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_compat_ioctl [2022-10-17 17:38:03,325 INFO L130 BoogieDeclarations]: Found specification of procedure fdput [2022-10-17 17:38:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure fdput [2022-10-17 17:38:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_dev_viable [2022-10-17 17:38:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_dev_viable [2022-10-17 17:38:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-10-17 17:38:03,327 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-10-17 17:38:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_mmap [2022-10-17 17:38:03,328 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_mmap [2022-10-17 17:38:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:38:03,329 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:38:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_put [2022-10-17 17:38:03,329 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_put [2022-10-17 17:38:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_try_dissolve_container [2022-10-17 17:38:03,329 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_try_dissolve_container [2022-10-17 17:38:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_unlock_and_free [2022-10-17 17:38:03,329 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_unlock_and_free [2022-10-17 17:38:03,330 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_release [2022-10-17 17:38:03,330 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_release [2022-10-17 17:38:03,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:38:03,331 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-10-17 17:38:03,331 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-10-17 17:38:03,331 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_write [2022-10-17 17:38:03,331 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_write [2022-10-17 17:38:03,331 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2022-10-17 17:38:03,331 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2022-10-17 17:38:03,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:38:03,332 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_unl_ioctl [2022-10-17 17:38:03,332 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_unl_ioctl [2022-10-17 17:38:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-10-17 17:38:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-10-17 17:38:03,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-10-17 17:38:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure up_write [2022-10-17 17:38:03,333 INFO L138 BoogieDeclarations]: Found implementation of procedure up_write [2022-10-17 17:38:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2022-10-17 17:38:03,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2022-10-17 17:38:03,334 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-10-17 17:38:03,334 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-10-17 17:38:03,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:03,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:38:03,335 INFO L130 BoogieDeclarations]: Found specification of procedure iommu_group_id [2022-10-17 17:38:03,335 INFO L138 BoogieDeclarations]: Found implementation of procedure iommu_group_id [2022-10-17 17:38:03,335 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_1 [2022-10-17 17:38:03,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_1 [2022-10-17 17:38:03,336 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-10-17 17:38:03,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-10-17 17:38:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-10-17 17:38:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-10-17 17:38:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-10-17 17:38:03,338 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-10-17 17:38:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-10-17 17:38:03,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-10-17 17:38:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-10-17 17:38:03,339 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-10-17 17:38:03,339 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-10-17 17:38:03,339 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-10-17 17:38:03,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:38:03,339 INFO L130 BoogieDeclarations]: Found specification of procedure iommu_group_put [2022-10-17 17:38:03,340 INFO L138 BoogieDeclarations]: Found implementation of procedure iommu_group_put [2022-10-17 17:38:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2022-10-17 17:38:03,340 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2022-10-17 17:38:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-10-17 17:38:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-10-17 17:38:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:38:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_put [2022-10-17 17:38:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_put [2022-10-17 17:38:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2022-10-17 17:38:03,342 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2022-10-17 17:38:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put_mutex [2022-10-17 17:38:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put_mutex [2022-10-17 17:38:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:38:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_put_external_user [2022-10-17 17:38:03,346 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_put_external_user [2022-10-17 17:38:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_cmpxchg [2022-10-17 17:38:03,348 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_cmpxchg [2022-10-17 17:38:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 17:38:03,349 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 17:38:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_read [2022-10-17 17:38:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_read [2022-10-17 17:38:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_get [2022-10-17 17:38:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_get [2022-10-17 17:38:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-10-17 17:38:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-10-17 17:38:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:38:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_unl_ioctl [2022-10-17 17:38:03,357 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_unl_ioctl [2022-10-17 17:38:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-10-17 17:38:03,357 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-10-17 17:38:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 17:38:03,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 17:38:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-10-17 17:38:03,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-10-17 17:38:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-10-17 17:38:03,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-10-17 17:38:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure compat_ptr [2022-10-17 17:38:03,358 INFO L138 BoogieDeclarations]: Found implementation of procedure compat_ptr [2022-10-17 17:38:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:38:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-10-17 17:38:03,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-10-17 17:38:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_mmap [2022-10-17 17:38:03,359 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_mmap [2022-10-17 17:38:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2022-10-17 17:38:03,359 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2022-10-17 17:38:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-10-17 17:38:03,360 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-10-17 17:38:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:38:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:38:03,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:38:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add_unless [2022-10-17 17:38:03,360 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add_unless [2022-10-17 17:38:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure kref_init [2022-10-17 17:38:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_init [2022-10-17 17:38:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_write [2022-10-17 17:38:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_write [2022-10-17 17:38:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_ioctl_check_extension [2022-10-17 17:38:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_ioctl_check_extension [2022-10-17 17:38:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_free_group_minor [2022-10-17 17:38:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_free_group_minor [2022-10-17 17:38:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-10-17 17:38:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-10-17 17:38:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-10-17 17:38:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-10-17 17:38:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-10-17 17:38:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-10-17 17:38:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_get_device [2022-10-17 17:38:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_get_device [2022-10-17 17:38:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-10-17 17:38:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-10-17 17:38:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure down_write [2022-10-17 17:38:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure down_write [2022-10-17 17:38:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_container_put [2022-10-17 17:38:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_container_put [2022-10-17 17:38:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-10-17 17:38:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-10-17 17:38:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-10-17 17:38:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-10-17 17:38:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-10-17 17:38:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-10-17 17:38:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_group_viable [2022-10-17 17:38:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_group_viable [2022-10-17 17:38:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_ioctl_set_iommu [2022-10-17 17:38:03,365 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_ioctl_set_iommu [2022-10-17 17:38:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_fops_open [2022-10-17 17:38:03,365 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_fops_open [2022-10-17 17:38:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure vfio_device_fops_release [2022-10-17 17:38:03,365 INFO L138 BoogieDeclarations]: Found implementation of procedure vfio_device_fops_release [2022-10-17 17:38:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:03,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:03,366 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-10-17 17:38:03,366 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-10-17 17:38:04,106 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:04,110 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:04,426 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:38:06,839 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:07,340 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:07,341 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:38:07,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:07 BoogieIcfgContainer [2022-10-17 17:38:07,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:07,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:07,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:07,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:07,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:00" (1/3) ... [2022-10-17 17:38:07,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216df9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:07, skipping insertion in model container [2022-10-17 17:38:07,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:02" (2/3) ... [2022-10-17 17:38:07,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216df9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:07, skipping insertion in model container [2022-10-17 17:38:07,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:07" (3/3) ... [2022-10-17 17:38:07,355 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--vfio--vfio.ko-entry_point.cil.out.i [2022-10-17 17:38:07,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:07,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:07,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:07,464 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;@39ec4115, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:07,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 969 states, 580 states have (on average 1.3189655172413792) internal successors, (765), 603 states have internal predecessors, (765), 300 states have call successors, (300), 88 states have call predecessors, (300), 87 states have return successors, (295), 293 states have call predecessors, (295), 295 states have call successors, (295) [2022-10-17 17:38:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-10-17 17:38:07,571 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:07,572 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-10-17 17:38:07,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:07,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -720815502, now seen corresponding path program 1 times [2022-10-17 17:38:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:07,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089405323] [2022-10-17 17:38:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:07,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-10-17 17:38:08,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:08,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089405323] [2022-10-17 17:38:08,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089405323] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:08,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:08,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972026339] [2022-10-17 17:38:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:08,948 INFO L87 Difference]: Start difference. First operand has 969 states, 580 states have (on average 1.3189655172413792) internal successors, (765), 603 states have internal predecessors, (765), 300 states have call successors, (300), 88 states have call predecessors, (300), 87 states have return successors, (295), 293 states have call predecessors, (295), 295 states have call successors, (295) Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-10-17 17:38:10,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:11,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:12,696 INFO L93 Difference]: Finished difference Result 2737 states and 3980 transitions. [2022-10-17 17:38:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:12,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 236 [2022-10-17 17:38:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:12,752 INFO L225 Difference]: With dead ends: 2737 [2022-10-17 17:38:12,752 INFO L226 Difference]: Without dead ends: 1810 [2022-10-17 17:38:12,779 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 17:38:12,799 INFO L413 NwaCegarLoop]: 1480 mSDtfsCounter, 1237 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2664 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:12,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 2664 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-10-17 17:38:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-10-17 17:38:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1807. [2022-10-17 17:38:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1096 states have (on average 1.3156934306569343) internal successors, (1442), 1126 states have internal predecessors, (1442), 541 states have call successors, (541), 170 states have call predecessors, (541), 169 states have return successors, (539), 535 states have call predecessors, (539), 539 states have call successors, (539) [2022-10-17 17:38:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2522 transitions. [2022-10-17 17:38:13,059 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2522 transitions. Word has length 236 [2022-10-17 17:38:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:13,061 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2522 transitions. [2022-10-17 17:38:13,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-10-17 17:38:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2522 transitions. [2022-10-17 17:38:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-10-17 17:38:13,071 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:13,072 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2022-10-17 17:38:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:38:13,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash -456412833, now seen corresponding path program 1 times [2022-10-17 17:38:13,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:13,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135661246] [2022-10-17 17:38:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:13,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-10-17 17:38:13,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:13,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135661246] [2022-10-17 17:38:13,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135661246] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:13,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:13,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052551271] [2022-10-17 17:38:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:13,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:13,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:13,743 INFO L87 Difference]: Start difference. First operand 1807 states and 2522 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-10-17 17:38:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:15,445 INFO L93 Difference]: Finished difference Result 5212 states and 7423 transitions. [2022-10-17 17:38:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 256 [2022-10-17 17:38:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:15,497 INFO L225 Difference]: With dead ends: 5212 [2022-10-17 17:38:15,497 INFO L226 Difference]: Without dead ends: 3447 [2022-10-17 17:38:15,514 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 17:38:15,517 INFO L413 NwaCegarLoop]: 1549 mSDtfsCounter, 1207 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:15,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 2703 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-10-17 17:38:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2022-10-17 17:38:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 3437. [2022-10-17 17:38:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 2089 states have (on average 1.3197702249880325) internal successors, (2757), 2145 states have internal predecessors, (2757), 1017 states have call successors, (1017), 331 states have call predecessors, (1017), 330 states have return successors, (1045), 1007 states have call predecessors, (1045), 1015 states have call successors, (1045) [2022-10-17 17:38:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4819 transitions. [2022-10-17 17:38:15,785 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4819 transitions. Word has length 256 [2022-10-17 17:38:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:15,791 INFO L495 AbstractCegarLoop]: Abstraction has 3437 states and 4819 transitions. [2022-10-17 17:38:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-10-17 17:38:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4819 transitions. [2022-10-17 17:38:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-10-17 17:38:15,806 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:15,806 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:38:15,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:38:15,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1942638549, now seen corresponding path program 1 times [2022-10-17 17:38:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821869892] [2022-10-17 17:38:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2022-10-17 17:38:16,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:16,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821869892] [2022-10-17 17:38:16,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821869892] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:16,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:16,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174575993] [2022-10-17 17:38:16,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:16,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:16,351 INFO L87 Difference]: Start difference. First operand 3437 states and 4819 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-10-17 17:38:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:17,572 INFO L93 Difference]: Finished difference Result 6738 states and 9428 transitions. [2022-10-17 17:38:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:17,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 262 [2022-10-17 17:38:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:17,607 INFO L225 Difference]: With dead ends: 6738 [2022-10-17 17:38:17,607 INFO L226 Difference]: Without dead ends: 3365 [2022-10-17 17:38:17,628 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 17:38:17,634 INFO L413 NwaCegarLoop]: 1189 mSDtfsCounter, 1306 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:17,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1306 Valid, 1189 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 17:38:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-10-17 17:38:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3365. [2022-10-17 17:38:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 2033 states have (on average 1.3108706345302508) internal successors, (2665), 2089 states have internal predecessors, (2665), 1001 states have call successors, (1001), 331 states have call predecessors, (1001), 330 states have return successors, (1029), 991 states have call predecessors, (1029), 999 states have call successors, (1029) [2022-10-17 17:38:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 4695 transitions. [2022-10-17 17:38:17,957 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 4695 transitions. Word has length 262 [2022-10-17 17:38:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:17,959 INFO L495 AbstractCegarLoop]: Abstraction has 3365 states and 4695 transitions. [2022-10-17 17:38:17,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-10-17 17:38:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 4695 transitions. [2022-10-17 17:38:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-10-17 17:38:17,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:17,971 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-10-17 17:38:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:38:17,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1055216131, now seen corresponding path program 1 times [2022-10-17 17:38:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:17,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233169390] [2022-10-17 17:38:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2022-10-17 17:38:18,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:18,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233169390] [2022-10-17 17:38:18,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233169390] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:18,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719046156] [2022-10-17 17:38:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:18,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:18,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:18,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:18,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:38:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 3733 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:38:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-10-17 17:38:19,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:19,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719046156] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:19,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:38:19,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-10-17 17:38:19,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015985261] [2022-10-17 17:38:19,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:19,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:19,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:19,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:19,807 INFO L87 Difference]: Start difference. First operand 3365 states and 4695 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-10-17 17:38:20,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:21,377 INFO L93 Difference]: Finished difference Result 6594 states and 9188 transitions. [2022-10-17 17:38:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 259 [2022-10-17 17:38:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:21,415 INFO L225 Difference]: With dead ends: 6594 [2022-10-17 17:38:21,415 INFO L226 Difference]: Without dead ends: 3293 [2022-10-17 17:38:21,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:21,438 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 1263 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:21,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1144 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 17:38:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2022-10-17 17:38:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3293. [2022-10-17 17:38:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 1997 states have (on average 1.2984476715072608) internal successors, (2593), 2053 states have internal predecessors, (2593), 965 states have call successors, (965), 331 states have call predecessors, (965), 330 states have return successors, (989), 955 states have call predecessors, (989), 963 states have call successors, (989) [2022-10-17 17:38:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4547 transitions. [2022-10-17 17:38:21,693 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4547 transitions. Word has length 259 [2022-10-17 17:38:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:21,694 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 4547 transitions. [2022-10-17 17:38:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-10-17 17:38:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4547 transitions. [2022-10-17 17:38:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-10-17 17:38:21,707 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:21,708 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:38:21,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 17:38:21,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a625cc-4acb-41bf-b835-7f4f9854c905/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:21,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash 752384732, now seen corresponding path program 1 times [2022-10-17 17:38:21,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:21,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673791843] [2022-10-17 17:38:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:21,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2022-10-17 17:38:22,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673791843] [2022-10-17 17:38:22,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673791843] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:22,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:22,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036599640] [2022-10-17 17:38:22,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:22,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:22,496 INFO L87 Difference]: Start difference. First operand 3293 states and 4547 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-10-17 17:38:23,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:24,108 INFO L93 Difference]: Finished difference Result 5160 states and 7099 transitions. [2022-10-17 17:38:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 338 [2022-10-17 17:38:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:24,126 INFO L225 Difference]: With dead ends: 5160 [2022-10-17 17:38:24,126 INFO L226 Difference]: Without dead ends: 1931 [2022-10-17 17:38:24,142 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 17:38:24,143 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 182 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:24,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2213 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-10-17 17:38:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-10-17 17:38:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1907. [2022-10-17 17:38:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1186 states have (on average 1.3010118043844856) internal successors, (1543), 1217 states have internal predecessors, (1543), 529 states have call successors, (529), 192 states have call predecessors, (529), 191 states have return successors, (540), 522 states have call predecessors, (540), 527 states have call successors, (540) [2022-10-17 17:38:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 2612 transitions. [2022-10-17 17:38:24,284 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 2612 transitions. Word has length 338 [2022-10-17 17:38:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:24,285 INFO L495 AbstractCegarLoop]: Abstraction has 1907 states and 2612 transitions. [2022-10-17 17:38:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-10-17 17:38:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 2612 transitions. [2022-10-17 17:38:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-10-17 17:38:24,312 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:24,313 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:24,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:38:24,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash 363225700, now seen corresponding path program 1 times [2022-10-17 17:38:24,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690727745] [2022-10-17 17:38:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:24,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2022-10-17 17:38:24,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:24,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690727745] [2022-10-17 17:38:24,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690727745] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:24,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:24,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:24,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141923327] [2022-10-17 17:38:24,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:24,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:24,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:24,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:24,975 INFO L87 Difference]: Start difference. First operand 1907 states and 2612 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2022-10-17 17:38:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:27,187 INFO L93 Difference]: Finished difference Result 4760 states and 6487 transitions. [2022-10-17 17:38:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 389 [2022-10-17 17:38:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:27,217 INFO L225 Difference]: With dead ends: 4760 [2022-10-17 17:38:27,217 INFO L226 Difference]: Without dead ends: 2954 [2022-10-17 17:38:27,227 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 17:38:27,228 INFO L413 NwaCegarLoop]: 1396 mSDtfsCounter, 748 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:27,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 2487 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-10-17 17:38:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2022-10-17 17:38:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2928. [2022-10-17 17:38:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 1813 states have (on average 1.2945394373965802) internal successors, (2347), 1862 states have internal predecessors, (2347), 805 states have call successors, (805), 310 states have call predecessors, (805), 309 states have return successors, (816), 793 states have call predecessors, (816), 803 states have call successors, (816) [2022-10-17 17:38:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 3968 transitions. [2022-10-17 17:38:27,431 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 3968 transitions. Word has length 389 [2022-10-17 17:38:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:27,433 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 3968 transitions. [2022-10-17 17:38:27,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2022-10-17 17:38:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 3968 transitions. [2022-10-17 17:38:27,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-10-17 17:38:27,445 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:27,446 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:27,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:38:27,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1684929176, now seen corresponding path program 1 times [2022-10-17 17:38:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:27,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007658034] [2022-10-17 17:38:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2022-10-17 17:38:28,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:28,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007658034] [2022-10-17 17:38:28,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007658034] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:28,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:28,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:28,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548097016] [2022-10-17 17:38:28,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:28,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:28,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:28,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:28,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:28,006 INFO L87 Difference]: Start difference. First operand 2928 states and 3968 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43)