./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 e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/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/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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-?-e2fb8be-m [2025-03-08 19:39:14,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 19:39:14,779 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-03-08 19:39:14,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 19:39:14,784 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 19:39:14,798 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 19:39:14,802 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 19:39:14,802 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 19:39:14,802 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 19:39:14,802 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 19:39:14,802 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 19:39:14,802 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 19:39:14,803 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 19:39:14,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 19:39:14,803 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 19:39:14,803 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 19:39:14,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 19:39:14,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 19:39:14,804 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/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 [2025-03-08 19:39:15,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 19:39:15,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 19:39:15,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 19:39:15,032 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 19:39:15,032 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 19:39:15,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i [2025-03-08 19:39:16,168 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164e64713/c8b4372c791149ad8d412224a6b5f0a8/FLAG5b2c51cb3 [2025-03-08 19:39:16,625 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 19:39:16,626 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i [2025-03-08 19:39:16,663 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164e64713/c8b4372c791149ad8d412224a6b5f0a8/FLAG5b2c51cb3 [2025-03-08 19:39:16,753 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164e64713/c8b4372c791149ad8d412224a6b5f0a8 [2025-03-08 19:39:16,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 19:39:16,756 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 19:39:16,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 19:39:16,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 19:39:16,762 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 19:39:16,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 07:39:16" (1/1) ... [2025-03-08 19:39:16,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7806ffb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:16, skipping insertion in model container [2025-03-08 19:39:16,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 07:39:16" (1/1) ... [2025-03-08 19:39:16,833 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 19:39:17,329 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/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] [2025-03-08 19:39:17,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 19:39:17,461 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 19:39:17,625 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/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] [2025-03-08 19:39:17,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 19:39:17,676 INFO L204 MainTranslator]: Completed translation [2025-03-08 19:39:17,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17 WrapperNode [2025-03-08 19:39:17,677 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 19:39:17,678 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 19:39:17,678 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 19:39:17,678 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 19:39:17,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,752 INFO L138 Inliner]: procedures = 118, calls = 555, calls flagged for inlining = 30, calls inlined = 25, statements flattened = 1113 [2025-03-08 19:39:17,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 19:39:17,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 19:39:17,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 19:39:17,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 19:39:17,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,807 INFO L175 MemorySlicer]: Split 409 memory accesses to 13 slices as follows [2, 21, 21, 21, 21, 21, 3, 21, 21, 3, 21, 45, 188]. 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, 0, 5]. The 399 writes are split as follows [0, 21, 21, 21, 21, 21, 1, 21, 21, 2, 21, 45, 183]. [2025-03-08 19:39:17,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,891 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,894 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 19:39:17,912 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 19:39:17,912 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 19:39:17,912 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 19:39:17,913 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (1/1) ... [2025-03-08 19:39:17,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 19:39:17,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 19:39:17,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 19:39:17,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 19:39:17,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-03-08 19:39:17,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-03-08 19:39:17,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-03-08 19:39:17,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#5 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#6 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#7 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#8 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#9 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#10 [2025-03-08 19:39:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#11 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#12 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#0 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#1 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#2 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#3 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#4 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#5 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#6 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#7 [2025-03-08 19:39:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#8 [2025-03-08 19:39:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#9 [2025-03-08 19:39:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#10 [2025-03-08 19:39:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#11 [2025-03-08 19:39:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#12 [2025-03-08 19:39:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2025-03-08 19:39:17,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2025-03-08 19:39:17,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 19:39:17,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 19:39:17,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2025-03-08 19:39:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2025-03-08 19:39:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-08 19:39:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#9 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#10 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#11 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#12 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure always_connected [2025-03-08 19:39:17,960 INFO L138 BoogieDeclarations]: Found implementation of procedure always_connected [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2025-03-08 19:39:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 19:39:17,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 19:39:18,163 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 19:39:18,164 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 19:39:18,189 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2025-03-08 19:39:23,791 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L7024: havoc usbnet_resume_#t~nondet112#1; [2025-03-08 19:39:23,791 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L6992: havoc ldv_reset_resume_1_#t~nondet107#1; [2025-03-08 19:39:23,792 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L7009: havoc usb_register_driver_#t~nondet109#1; [2025-03-08 19:39:23,792 INFO L1307 $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; [2025-03-08 19:39:23,792 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L7028: havoc usbnet_suspend_#t~nondet113#1; [2025-03-08 19:39:23,792 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L7013: havoc usb_reset_device_#t~nondet110#1; [2025-03-08 19:39:23,792 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L7020: havoc usbnet_probe_#t~nondet111#1; [2025-03-08 19:39:23,847 INFO L? ?]: Removed 196 outVars from TransFormulas that were not future-live. [2025-03-08 19:39:23,848 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 19:39:23,856 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 19:39:23,858 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 19:39:23,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 07:39:23 BoogieIcfgContainer [2025-03-08 19:39:23,858 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 19:39:23,860 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 19:39:23,860 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 19:39:23,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 19:39:23,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 07:39:16" (1/3) ... [2025-03-08 19:39:23,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44219e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 07:39:23, skipping insertion in model container [2025-03-08 19:39:23,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 07:39:17" (2/3) ... [2025-03-08 19:39:23,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44219e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 07:39:23, skipping insertion in model container [2025-03-08 19:39:23,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 07:39:23" (3/3) ... [2025-03-08 19:39:23,866 INFO L128 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--usb--cdc_subset.ko-entry_point.cil.out.i [2025-03-08 19:39:23,876 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 19:39:23,878 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. [2025-03-08 19:39:23,919 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 19:39:23,931 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;@21f42efa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 19:39:23,931 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 19:39:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 141 states have (on average 1.4539007092198581) internal successors, (205), 157 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) [2025-03-08 19:39:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-08 19:39:23,944 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 19:39:23,944 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] [2025-03-08 19:39:23,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 19:39:23,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 19:39:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash -55793251, now seen corresponding path program 1 times [2025-03-08 19:39:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 19:39:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302839188] [2025-03-08 19:39:23,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 19:39:23,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 19:39:44,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-08 19:39:45,106 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-08 19:39:45,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 19:39:45,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 19:39:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2025-03-08 19:39:45,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 19:39:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302839188] [2025-03-08 19:39:45,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302839188] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 19:39:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296999009] [2025-03-08 19:39:45,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 19:39:45,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 19:39:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 19:39:45,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 19:39:45,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 19:40:07,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-08 19:40:07,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-08 19:40:07,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 19:40:07,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 19:40:07,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 4654 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 19:40:07,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 19:40:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2025-03-08 19:40:07,724 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 19:40:07,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296999009] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 19:40:07,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 19:40:07,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 19:40:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194438134] [2025-03-08 19:40:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 19:40:07,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 19:40:07,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 19:40:07,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 19:40:07,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 19:40:07,749 INFO L87 Difference]: Start difference. First operand has 186 states, 141 states have (on average 1.4539007092198581) internal successors, (205), 157 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) [2025-03-08 19:40:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 19:40:07,774 INFO L93 Difference]: Finished difference Result 367 states and 532 transitions. [2025-03-08 19:40:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 19:40:07,775 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 [2025-03-08 19:40:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 19:40:07,780 INFO L225 Difference]: With dead ends: 367 [2025-03-08 19:40:07,780 INFO L226 Difference]: Without dead ends: 170 [2025-03-08 19:40:07,783 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 [2025-03-08 19:40:07,784 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 [2025-03-08 19:40:07,786 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] [2025-03-08 19:40:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-03-08 19:40:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2025-03-08 19:40:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 136 states have (on average 1.3823529411764706) internal successors, (188), 141 states have internal predecessors, (188), 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) [2025-03-08 19:40:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2025-03-08 19:40:07,820 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 118 [2025-03-08 19:40:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 19:40:07,820 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2025-03-08 19:40:07,820 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) [2025-03-08 19:40:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2025-03-08 19:40:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-08 19:40:07,825 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 19:40:07,825 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] [2025-03-08 19:40:07,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 19:40:08,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-08 19:40:08,026 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 19:40:08,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 19:40:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1710788643, now seen corresponding path program 1 times [2025-03-08 19:40:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 19:40:08,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904380577] [2025-03-08 19:40:08,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 19:40:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 19:40:29,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-08 19:40:29,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-08 19:40:29,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 19:40:29,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 19:40:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-03-08 19:40:29,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 19:40:29,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904380577] [2025-03-08 19:40:29,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904380577] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 19:40:29,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 19:40:29,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 19:40:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876847396] [2025-03-08 19:40:29,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 19:40:29,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 19:40:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 19:40:29,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 19:40:29,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 19:40:29,839 INFO L87 Difference]: Start difference. First operand 170 states and 232 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) [2025-03-08 19:40:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 19:40:29,995 INFO L93 Difference]: Finished difference Result 435 states and 600 transitions. [2025-03-08 19:40:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 19:40:29,995 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 [2025-03-08 19:40:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 19:40:29,997 INFO L225 Difference]: With dead ends: 435 [2025-03-08 19:40:29,997 INFO L226 Difference]: Without dead ends: 283 [2025-03-08 19:40:29,998 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 [2025-03-08 19:40:29,999 INFO L435 NwaCegarLoop]: 233 mSDtfsCounter, 180 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 19:40:29,999 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 434 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 19:40:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2025-03-08 19:40:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 269. [2025-03-08 19:40:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 221 states have (on average 1.420814479638009) internal successors, (314), 226 states have internal predecessors, (314), 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) [2025-03-08 19:40:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 376 transitions. [2025-03-08 19:40:30,022 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 376 transitions. Word has length 118 [2025-03-08 19:40:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 19:40:30,022 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 376 transitions. [2025-03-08 19:40:30,023 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) [2025-03-08 19:40:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 376 transitions. [2025-03-08 19:40:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-03-08 19:40:30,024 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 19:40:30,024 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] [2025-03-08 19:40:30,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 19:40:30,024 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 19:40:30,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 19:40:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2053495326, now seen corresponding path program 1 times [2025-03-08 19:40:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 19:40:30,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917211850] [2025-03-08 19:40:30,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 19:40:30,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 19:40:51,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-08 19:40:51,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-08 19:40:51,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 19:40:51,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 19:40:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-03-08 19:40:52,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 19:40:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917211850] [2025-03-08 19:40:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917211850] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 19:40:52,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 19:40:52,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 19:40:52,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177367423] [2025-03-08 19:40:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 19:40:52,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 19:40:52,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 19:40:52,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 19:40:52,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 19:40:52,279 INFO L87 Difference]: Start difference. First operand 269 states and 376 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) [2025-03-08 19:40:56,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-08 19:40:56,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 19:40:56,965 INFO L93 Difference]: Finished difference Result 730 states and 1030 transitions. [2025-03-08 19:40:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 19:40:56,966 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 [2025-03-08 19:40:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 19:40:56,970 INFO L225 Difference]: With dead ends: 730 [2025-03-08 19:40:56,972 INFO L226 Difference]: Without dead ends: 479 [2025-03-08 19:40:56,973 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 [2025-03-08 19:40:56,975 INFO L435 NwaCegarLoop]: 292 mSDtfsCounter, 180 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2025-03-08 19:40:56,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 505 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2025-03-08 19:40:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2025-03-08 19:40:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 475. [2025-03-08 19:40:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 399 states have (on average 1.4335839598997493) internal successors, (572), 404 states have internal predecessors, (572), 52 states have call successors, (52), 24 states have call predecessors, (52), 23 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2025-03-08 19:40:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 670 transitions. [2025-03-08 19:40:57,013 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 670 transitions. Word has length 117 [2025-03-08 19:40:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 19:40:57,014 INFO L471 AbstractCegarLoop]: Abstraction has 475 states and 670 transitions. [2025-03-08 19:40:57,014 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) [2025-03-08 19:40:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 670 transitions. [2025-03-08 19:40:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2025-03-08 19:40:57,017 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 19:40:57,017 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] [2025-03-08 19:40:57,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 19:40:57,018 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 19:40:57,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 19:40:57,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1309413883, now seen corresponding path program 1 times [2025-03-08 19:40:57,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 19:40:57,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458502080] [2025-03-08 19:40:57,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 19:40:57,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms