./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:12,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:12,156 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-19 07:54:12,162 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:12,163 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:12,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:12,194 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:12,195 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:12,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:12,197 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:12,198 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:12,199 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:12,199 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:12,200 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:12,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:54:12,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:12,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:12,203 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:54:12,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:12,204 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:54:12,204 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:54:12,205 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:12,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:12,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:12,207 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:12,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:12,208 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:12,209 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:12,209 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:54:12,210 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:12,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:12,211 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:12,227 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:54:12,227 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:12,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:12,228 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:12,229 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2023-11-19 07:54:12,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:12,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:12,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:12,616 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:12,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:12,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2023-11-19 07:54:15,977 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:16,639 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:16,640 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2023-11-19 07:54:16,698 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/data/53d6cd74b/f987342484f44b72912fde8b407419d4/FLAGd18eda66e [2023-11-19 07:54:16,717 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/data/53d6cd74b/f987342484f44b72912fde8b407419d4 [2023-11-19 07:54:16,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:16,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:16,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:16,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:16,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:16,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:16" (1/1) ... [2023-11-19 07:54:16,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334a693c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:16, skipping insertion in model container [2023-11-19 07:54:16,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:16" (1/1) ... [2023-11-19 07:54:16,951 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:17,639 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2023-11-19 07:54:17,640 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2023-11-19 07:54:17,934 WARN L240 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_3494050b-eb26-4dae-87cb-0dd0f8387e5a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2023-11-19 07:54:18,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:19,012 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:19,128 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2023-11-19 07:54:19,128 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2023-11-19 07:54:19,131 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [6154] [2023-11-19 07:54:19,133 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [6161] [2023-11-19 07:54:19,133 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6169-6170] [2023-11-19 07:54:19,134 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6178-6179] [2023-11-19 07:54:19,140 WARN L240 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_3494050b-eb26-4dae-87cb-0dd0f8387e5a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2023-11-19 07:54:19,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:19,646 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:19,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19 WrapperNode [2023-11-19 07:54:19,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:19,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:19,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:19,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:19,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:19,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:19,911 INFO L138 Inliner]: procedures = 202, calls = 2062, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2275 [2023-11-19 07:54:19,912 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:19,913 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:19,913 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:19,913 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:19,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:19,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:19,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:19,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:20,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:20,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:20,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:20,166 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:20,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:20,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:20,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:20,193 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:20,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (1/1) ... [2023-11-19 07:54:20,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:20,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:20,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:20,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3494050b-eb26-4dae-87cb-0dd0f8387e5a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-19 07:54:20,284 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-19 07:54:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-19 07:54:20,285 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-19 07:54:20,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 07:54:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 07:54:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 07:54:20,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 07:54:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-19 07:54:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-19 07:54:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 07:54:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 07:54:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 07:54:20,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 07:54:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:54:20,289 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:54:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2023-11-19 07:54:20,289 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2023-11-19 07:54:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 07:54:20,290 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 07:54:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:54:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-19 07:54:20,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-19 07:54:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 07:54:20,292 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 07:54:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2023-11-19 07:54:20,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2023-11-19 07:54:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 07:54:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 07:54:20,294 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 07:54:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 07:54:20,295 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 07:54:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-19 07:54:20,296 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-19 07:54:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-19 07:54:20,296 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-19 07:54:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-19 07:54:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-19 07:54:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 07:54:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 07:54:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 07:54:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2023-11-19 07:54:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2023-11-19 07:54:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2023-11-19 07:54:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2023-11-19 07:54:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-19 07:54:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-19 07:54:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 07:54:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2023-11-19 07:54:20,299 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2023-11-19 07:54:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2023-11-19 07:54:20,299 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2023-11-19 07:54:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:54:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 07:54:20,300 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 07:54:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2023-11-19 07:54:20,300 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2023-11-19 07:54:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 07:54:20,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 07:54:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-19 07:54:20,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-19 07:54:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 07:54:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 07:54:20,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2023-11-19 07:54:20,304 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2023-11-19 07:54:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:54:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-19 07:54:20,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-19 07:54:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2023-11-19 07:54:20,306 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2023-11-19 07:54:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:54:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2023-11-19 07:54:20,307 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2023-11-19 07:54:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2023-11-19 07:54:20,307 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2023-11-19 07:54:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-19 07:54:20,307 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-19 07:54:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:20,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:20,855 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:20,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:21,283 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 07:54:26,855 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:26,878 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:26,878 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:54:26,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:26 BoogieIcfgContainer [2023-11-19 07:54:26,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:26,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:26,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:26,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:26,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:16" (1/3) ... [2023-11-19 07:54:26,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cef3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:26, skipping insertion in model container [2023-11-19 07:54:26,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:19" (2/3) ... [2023-11-19 07:54:26,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cef3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:26, skipping insertion in model container [2023-11-19 07:54:26,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:26" (3/3) ... [2023-11-19 07:54:26,911 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2023-11-19 07:54:26,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:26,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:54:27,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:27,039 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@669ba105, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:27,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:54:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 445 states have (on average 1.3932584269662922) internal successors, (620), 454 states have internal predecessors, (620), 114 states have call successors, (114), 34 states have call predecessors, (114), 33 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-19 07:54:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 07:54:27,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:27,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:27,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:27,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash 947410489, now seen corresponding path program 1 times [2023-11-19 07:54:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090428238] [2023-11-19 07:54:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:28,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:54:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:54:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:28,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:28,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090428238] [2023-11-19 07:54:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090428238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:28,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:28,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:54:28,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870451913] [2023-11-19 07:54:28,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:28,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:28,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:28,133 INFO L87 Difference]: Start difference. First operand has 594 states, 445 states have (on average 1.3932584269662922) internal successors, (620), 454 states have internal predecessors, (620), 114 states have call successors, (114), 34 states have call predecessors, (114), 33 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:54:33,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:54:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:33,505 INFO L93 Difference]: Finished difference Result 1275 states and 1863 transitions. [2023-11-19 07:54:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:54:33,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-11-19 07:54:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:33,534 INFO L225 Difference]: With dead ends: 1275 [2023-11-19 07:54:33,534 INFO L226 Difference]: Without dead ends: 663 [2023-11-19 07:54:33,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:33,554 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 268 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 127 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:33,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1309 Invalid, 1040 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [127 Valid, 912 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2023-11-19 07:54:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-11-19 07:54:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 604. [2023-11-19 07:54:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 457 states have (on average 1.37417943107221) internal successors, (628), 461 states have internal predecessors, (628), 112 states have call successors, (112), 35 states have call predecessors, (112), 34 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-19 07:54:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 851 transitions. [2023-11-19 07:54:33,699 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 851 transitions. Word has length 36 [2023-11-19 07:54:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:33,699 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 851 transitions. [2023-11-19 07:54:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:54:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 851 transitions. [2023-11-19 07:54:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 07:54:33,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:33,705 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 07:54:33,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:33,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:33,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1174134816, now seen corresponding path program 1 times [2023-11-19 07:54:33,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:33,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767636046] [2023-11-19 07:54:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:33,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:54:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:34,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:54:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:34,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-19 07:54:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:54:34,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:34,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767636046] [2023-11-19 07:54:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767636046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:34,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:34,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:54:34,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576952156] [2023-11-19 07:54:34,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:34,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:34,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:34,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:34,116 INFO L87 Difference]: Start difference. First operand 604 states and 851 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:54:39,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:54:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:39,286 INFO L93 Difference]: Finished difference Result 1261 states and 1806 transitions. [2023-11-19 07:54:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2023-11-19 07:54:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:39,294 INFO L225 Difference]: With dead ends: 1261 [2023-11-19 07:54:39,294 INFO L226 Difference]: Without dead ends: 673 [2023-11-19 07:54:39,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:39,299 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 225 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 118 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:39,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1284 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 904 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2023-11-19 07:54:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-11-19 07:54:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 613. [2023-11-19 07:54:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 465 states have (on average 1.3741935483870968) internal successors, (639), 469 states have internal predecessors, (639), 113 states have call successors, (113), 35 states have call predecessors, (113), 34 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 07:54:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 864 transitions. [2023-11-19 07:54:39,355 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 864 transitions. Word has length 55 [2023-11-19 07:54:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:39,356 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 864 transitions. [2023-11-19 07:54:39,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:54:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 864 transitions. [2023-11-19 07:54:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 07:54:39,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:39,360 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 07:54:39,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:39,360 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:39,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:39,361 INFO L85 PathProgramCache]: Analyzing trace with hash -783423498, now seen corresponding path program 1 times [2023-11-19 07:54:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:39,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882463771] [2023-11-19 07:54:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:39,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:54:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:39,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:54:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:39,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:54:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:54:39,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882463771] [2023-11-19 07:54:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882463771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:39,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:39,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:54:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424933214] [2023-11-19 07:54:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:39,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:39,798 INFO L87 Difference]: Start difference. First operand 613 states and 864 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:54:44,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:54:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:44,251 INFO L93 Difference]: Finished difference Result 1313 states and 1888 transitions. [2023-11-19 07:54:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:44,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 61 [2023-11-19 07:54:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:44,259 INFO L225 Difference]: With dead ends: 1313 [2023-11-19 07:54:44,259 INFO L226 Difference]: Without dead ends: 716 [2023-11-19 07:54:44,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:44,264 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 277 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 119 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:44,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1274 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 909 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-11-19 07:54:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-19 07:54:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 656. [2023-11-19 07:54:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 506 states have (on average 1.3873517786561265) internal successors, (702), 510 states have internal predecessors, (702), 115 states have call successors, (115), 35 states have call predecessors, (115), 34 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-19 07:54:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 931 transitions. [2023-11-19 07:54:44,307 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 931 transitions. Word has length 61 [2023-11-19 07:54:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:44,308 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 931 transitions. [2023-11-19 07:54:44,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:54:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 931 transitions. [2023-11-19 07:54:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-19 07:54:44,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:44,313 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 07:54:44,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:54:44,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:44,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash -731283880, now seen corresponding path program 1 times [2023-11-19 07:54:44,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:44,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537739463] [2023-11-19 07:54:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:44,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:54:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:54:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:44,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:54:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-19 07:54:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:54:44,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:44,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537739463] [2023-11-19 07:54:44,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537739463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:44,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:44,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:54:44,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445064299] [2023-11-19 07:54:44,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:44,823 INFO L87 Difference]: Start difference. First operand 656 states and 931 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:54:50,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:54:52,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:54:54,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:54:56,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:54:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:56,842 INFO L93 Difference]: Finished difference Result 1819 states and 2700 transitions. [2023-11-19 07:54:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2023-11-19 07:54:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:56,852 INFO L225 Difference]: With dead ends: 1819 [2023-11-19 07:54:56,852 INFO L226 Difference]: Without dead ends: 1179 [2023-11-19 07:54:56,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:54:56,857 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 929 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 406 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:56,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 1561 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1300 Invalid, 4 Unknown, 0 Unchecked, 11.8s Time] [2023-11-19 07:54:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2023-11-19 07:54:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 658. [2023-11-19 07:54:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 508 states have (on average 1.3858267716535433) internal successors, (704), 512 states have internal predecessors, (704), 115 states have call successors, (115), 35 states have call predecessors, (115), 34 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-19 07:54:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 933 transitions. [2023-11-19 07:54:56,908 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 933 transitions. Word has length 84 [2023-11-19 07:54:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:56,909 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 933 transitions. [2023-11-19 07:54:56,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:54:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 933 transitions. [2023-11-19 07:54:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 07:54:56,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:56,913 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 07:54:56,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:54:56,914 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:56,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1428227243, now seen corresponding path program 1 times [2023-11-19 07:54:56,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:56,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606838548] [2023-11-19 07:54:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:56,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:54:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:54:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-19 07:54:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-19 07:54:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-19 07:54:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:54:57,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:57,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606838548] [2023-11-19 07:54:57,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606838548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:57,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:57,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:54:57,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198814325] [2023-11-19 07:54:57,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:57,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:57,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:57,592 INFO L87 Difference]: Start difference. First operand 658 states and 933 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:55:02,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:55:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:03,342 INFO L93 Difference]: Finished difference Result 1578 states and 2251 transitions. [2023-11-19 07:55:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 90 [2023-11-19 07:55:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:03,353 INFO L225 Difference]: With dead ends: 1578 [2023-11-19 07:55:03,353 INFO L226 Difference]: Without dead ends: 936 [2023-11-19 07:55:03,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:55:03,360 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1255 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 465 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:03,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 1114 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1296 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2023-11-19 07:55:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2023-11-19 07:55:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 826. [2023-11-19 07:55:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 635 states have (on average 1.3811023622047245) internal successors, (877), 640 states have internal predecessors, (877), 141 states have call successors, (141), 50 states have call predecessors, (141), 49 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-19 07:55:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1158 transitions. [2023-11-19 07:55:03,427 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1158 transitions. Word has length 90 [2023-11-19 07:55:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:03,427 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1158 transitions. [2023-11-19 07:55:03,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:55:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1158 transitions. [2023-11-19 07:55:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 07:55:03,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:03,431 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 07:55:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:55:03,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:03,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash 456884620, now seen corresponding path program 1 times [2023-11-19 07:55:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508756137] [2023-11-19 07:55:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:03,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:03,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:55:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:55:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:03,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:55:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:03,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-19 07:55:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508756137] [2023-11-19 07:55:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508756137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:03,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:03,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484486434] [2023-11-19 07:55:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:03,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:03,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:03,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:03,797 INFO L87 Difference]: Start difference. First operand 826 states and 1158 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)