./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-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --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 3acbab6b9aaee88273e5c2573b1301b2b4d4059e0d0ec0927c600e9ad855395b --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 06:53:05,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 06:53:05,121 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-02-06 06:53:05,125 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 06:53:05,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 06:53:05,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 06:53:05,142 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 06:53:05,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 06:53:05,143 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 06:53:05,143 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 06:53:05,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 06:53:05,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 06:53:05,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 06:53:05,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 06:53:05,143 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 06:53:05,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 06:53:05,143 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 06:53:05,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 06:53:05,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 06:53:05,145 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 06:53:05,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 06:53:05,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 06:53:05,146 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 06:53:05,146 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 06:53:05,146 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 06:53:05,147 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux 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 -> 3acbab6b9aaee88273e5c2573b1301b2b4d4059e0d0ec0927c600e9ad855395b [2025-02-06 06:53:05,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 06:53:05,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 06:53:05,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 06:53:05,388 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 06:53:05,388 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 06:53:05,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i [2025-02-06 06:53:06,586 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/990385e49/cf13d61873c7461aa4c53a0bbe3a6646/FLAG214810988 [2025-02-06 06:53:07,086 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 06:53:07,086 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i [2025-02-06 06:53:07,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/990385e49/cf13d61873c7461aa4c53a0bbe3a6646/FLAG214810988 [2025-02-06 06:53:07,139 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/990385e49/cf13d61873c7461aa4c53a0bbe3a6646 [2025-02-06 06:53:07,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 06:53:07,142 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 06:53:07,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 06:53:07,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 06:53:07,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 06:53:07,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 06:53:07" (1/1) ... [2025-02-06 06:53:07,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536e3088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:07, skipping insertion in model container [2025-02-06 06:53:07,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 06:53:07" (1/1) ... [2025-02-06 06:53:07,209 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 06:53:07,741 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i[185252,185265] [2025-02-06 06:53:07,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 06:53:07,857 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 06:53:08,002 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i[185252,185265] [2025-02-06 06:53:08,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 06:53:08,062 INFO L204 MainTranslator]: Completed translation [2025-02-06 06:53:08,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08 WrapperNode [2025-02-06 06:53:08,063 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 06:53:08,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 06:53:08,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 06:53:08,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 06:53:08,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,139 INFO L138 Inliner]: procedures = 118, calls = 555, calls flagged for inlining = 30, calls inlined = 25, statements flattened = 1113 [2025-02-06 06:53:08,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 06:53:08,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 06:53:08,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 06:53:08,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 06:53:08,146 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,203 INFO L175 MemorySlicer]: Split 409 memory accesses to 13 slices as follows [2, 21, 21, 21, 21, 21, 3, 21, 21, 21, 45, 188, 3]. 46 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0]. The 399 writes are split as follows [0, 21, 21, 21, 21, 21, 1, 21, 21, 21, 45, 183, 2]. [2025-02-06 06:53:08,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,275 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 06:53:08,315 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 06:53:08,315 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 06:53:08,315 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 06:53:08,316 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (1/1) ... [2025-02-06 06:53:08,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 06:53:08,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 06:53:08,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 06:53:08,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#5 [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#6 [2025-02-06 06:53:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#7 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#8 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#9 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#10 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#11 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#12 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#0 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#1 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#2 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#3 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#4 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#5 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#6 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#7 [2025-02-06 06:53:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#8 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#9 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#10 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#11 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#12 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2025-02-06 06:53:08,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-06 06:53:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2025-02-06 06:53:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2025-02-06 06:53:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2025-02-06 06:53:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2025-02-06 06:53:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2025-02-06 06:53:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2025-02-06 06:53:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-06 06:53:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev [2025-02-06 06:53:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2025-02-06 06:53:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2025-02-06 06:53:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#9 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#10 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#11 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#12 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure always_connected [2025-02-06 06:53:08,362 INFO L138 BoogieDeclarations]: Found implementation of procedure always_connected [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2025-02-06 06:53:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 06:53:08,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 06:53:08,570 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 06:53:08,571 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 06:53:08,605 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2025-02-06 06:53:14,381 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L7024: havoc usbnet_resume_#t~nondet112#1; [2025-02-06 06:53:14,382 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L6992: havoc ldv_reset_resume_1_#t~nondet107#1; [2025-02-06 06:53:14,382 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L7009: havoc usb_register_driver_#t~nondet109#1; [2025-02-06 06:53:14,382 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L5987: call ULTIMATE.dealloc(main_~#ldvarg2~0#1.base, main_~#ldvarg2~0#1.offset);havoc main_~#ldvarg2~0#1.base, main_~#ldvarg2~0#1.offset; [2025-02-06 06:53:14,382 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L7028: havoc usbnet_suspend_#t~nondet113#1; [2025-02-06 06:53:14,382 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L7013: havoc usb_reset_device_#t~nondet110#1; [2025-02-06 06:53:14,382 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L7020: havoc usbnet_probe_#t~nondet111#1; [2025-02-06 06:53:14,430 INFO L? ?]: Removed 196 outVars from TransFormulas that were not future-live. [2025-02-06 06:53:14,430 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 06:53:14,442 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 06:53:14,444 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 06:53:14,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 06:53:14 BoogieIcfgContainer [2025-02-06 06:53:14,444 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 06:53:14,446 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 06:53:14,446 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 06:53:14,456 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 06:53:14,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 06:53:07" (1/3) ... [2025-02-06 06:53:14,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7accbaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 06:53:14, skipping insertion in model container [2025-02-06 06:53:14,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08" (2/3) ... [2025-02-06 06:53:14,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7accbaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 06:53:14, skipping insertion in model container [2025-02-06 06:53:14,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 06:53:14" (3/3) ... [2025-02-06 06:53:14,458 INFO L128 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i [2025-02-06 06:53:14,474 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 06:53:14,480 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i that has 11 procedures, 187 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-06 06:53:14,525 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 06:53:14,533 INFO L333 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, 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;@7a0211a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 06:53:14,535 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-06 06:53:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 141 states have (on average 1.4539007092198581) internal successors, (205), 164 states have internal predecessors, (205), 34 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2025-02-06 06:53:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-02-06 06:53:14,547 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 06:53:14,548 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 06:53:14,548 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 06:53:14,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 06:53:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -55793251, now seen corresponding path program 1 times [2025-02-06 06:53:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 06:53:14,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68524231] [2025-02-06 06:53:14,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 06:53:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 06:53:36,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-02-06 06:53:37,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-02-06 06:53:37,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 06:53:37,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 06:53:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2025-02-06 06:53:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 06:53:37,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68524231] [2025-02-06 06:53:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68524231] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 06:53:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637672350] [2025-02-06 06:53:37,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 06:53:37,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 06:53:37,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 06:53:37,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 06:53:37,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 06:53:59,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-02-06 06:54:00,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-02-06 06:54:00,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 06:54:00,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 06:54:00,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 4654 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-06 06:54:00,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 06:54:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2025-02-06 06:54:00,300 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 06:54:00,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637672350] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 06:54:00,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 06:54:00,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-06 06:54:00,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529151757] [2025-02-06 06:54:00,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 06:54:00,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 06:54:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 06:54:00,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 06:54:00,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 06:54:00,317 INFO L87 Difference]: Start difference. First operand has 193 states, 141 states have (on average 1.4539007092198581) internal successors, (205), 164 states have internal predecessors, (205), 34 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2025-02-06 06:54:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 06:54:00,339 INFO L93 Difference]: Finished difference Result 381 states and 532 transitions. [2025-02-06 06:54:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 06:54:00,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 118 [2025-02-06 06:54:00,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 06:54:00,345 INFO L225 Difference]: With dead ends: 381 [2025-02-06 06:54:00,345 INFO L226 Difference]: Without dead ends: 170 [2025-02-06 06:54:00,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 06:54:00,349 INFO L435 NwaCegarLoop]: 255 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 06:54:00,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 06:54:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-02-06 06:54:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2025-02-06 06:54:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 136 states have (on average 1.3308823529411764) internal successors, (181), 141 states have internal predecessors, (181), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2025-02-06 06:54:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 225 transitions. [2025-02-06 06:54:00,385 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 225 transitions. Word has length 118 [2025-02-06 06:54:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 06:54:00,385 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 225 transitions. [2025-02-06 06:54:00,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2025-02-06 06:54:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 225 transitions. [2025-02-06 06:54:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-02-06 06:54:00,389 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 06:54:00,389 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 06:54:00,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 06:54:00,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-06 06:54:00,591 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 06:54:00,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 06:54:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1710788643, now seen corresponding path program 1 times [2025-02-06 06:54:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 06:54:00,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217864957] [2025-02-06 06:54:00,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 06:54:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 06:54:21,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-02-06 06:54:22,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-02-06 06:54:22,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 06:54:22,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 06:54:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-02-06 06:54:22,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 06:54:22,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217864957] [2025-02-06 06:54:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217864957] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 06:54:22,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 06:54:22,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 06:54:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219574595] [2025-02-06 06:54:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 06:54:22,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 06:54:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 06:54:22,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 06:54:22,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 06:54:22,597 INFO L87 Difference]: Start difference. First operand 170 states and 225 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-06 06:54:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 06:54:22,743 INFO L93 Difference]: Finished difference Result 435 states and 579 transitions. [2025-02-06 06:54:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 06:54:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 118 [2025-02-06 06:54:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 06:54:22,746 INFO L225 Difference]: With dead ends: 435 [2025-02-06 06:54:22,746 INFO L226 Difference]: Without dead ends: 282 [2025-02-06 06:54:22,747 INFO L434 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 [2025-02-06 06:54:22,747 INFO L435 NwaCegarLoop]: 227 mSDtfsCounter, 173 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 06:54:22,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 422 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 06:54:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2025-02-06 06:54:22,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 268. [2025-02-06 06:54:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 220 states have (on average 1.3590909090909091) internal successors, (299), 225 states have internal predecessors, (299), 34 states have call successors, (34), 14 states have call predecessors, (34), 13 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-02-06 06:54:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 361 transitions. [2025-02-06 06:54:22,764 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 361 transitions. Word has length 118 [2025-02-06 06:54:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 06:54:22,764 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 361 transitions. [2025-02-06 06:54:22,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-06 06:54:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 361 transitions. [2025-02-06 06:54:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-02-06 06:54:22,765 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 06:54:22,769 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 06:54:22,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 06:54:22,770 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 06:54:22,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 06:54:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2053495326, now seen corresponding path program 1 times [2025-02-06 06:54:22,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 06:54:22,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480241329] [2025-02-06 06:54:22,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 06:54:22,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 06:54:43,829 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-02-06 06:54:43,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-02-06 06:54:43,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 06:54:43,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 06:54:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-02-06 06:54:44,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 06:54:44,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480241329] [2025-02-06 06:54:44,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480241329] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 06:54:44,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 06:54:44,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 06:54:44,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548384877] [2025-02-06 06:54:44,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 06:54:44,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 06:54:44,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 06:54:44,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 06:54:44,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 06:54:44,560 INFO L87 Difference]: Start difference. First operand 268 states and 361 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-02-06 06:54:48,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-06 06:54:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 06:54:49,258 INFO L93 Difference]: Finished difference Result 651 states and 873 transitions. [2025-02-06 06:54:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 06:54:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 117 [2025-02-06 06:54:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 06:54:49,264 INFO L225 Difference]: With dead ends: 651 [2025-02-06 06:54:49,264 INFO L226 Difference]: Without dead ends: 401 [2025-02-06 06:54:49,265 INFO L434 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 [2025-02-06 06:54:49,271 INFO L435 NwaCegarLoop]: 286 mSDtfsCounter, 174 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2025-02-06 06:54:49,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 493 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2025-02-06 06:54:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2025-02-06 06:54:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 397. [2025-02-06 06:54:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 329 states have (on average 1.3495440729483283) internal successors, (444), 334 states have internal predecessors, (444), 46 states have call successors, (46), 22 states have call predecessors, (46), 21 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2025-02-06 06:54:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 530 transitions. [2025-02-06 06:54:49,323 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 530 transitions. Word has length 117 [2025-02-06 06:54:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 06:54:49,323 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 530 transitions. [2025-02-06 06:54:49,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-02-06 06:54:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 530 transitions. [2025-02-06 06:54:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2025-02-06 06:54:49,328 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 06:54:49,329 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 06:54:49,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 06:54:49,329 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 06:54:49,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 06:54:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1309413883, now seen corresponding path program 1 times [2025-02-06 06:54:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 06:54:49,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151827234] [2025-02-06 06:54:49,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 06:54:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms