./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--wireless--p54--p54usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/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_1.5.800.v20200727-1323.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--wireless--p54--p54usb.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.graphml --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 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 18:09:41,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 18:09:41,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 18:09:41,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 18:09:41,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 18:09:41,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 18:09:41,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 18:09:41,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 18:09:41,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 18:09:41,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 18:09:41,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 18:09:41,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 18:09:41,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 18:09:41,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 18:09:41,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 18:09:41,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 18:09:41,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 18:09:41,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 18:09:41,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 18:09:41,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 18:09:41,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 18:09:41,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 18:09:41,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 18:09:41,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 18:09:41,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 18:09:41,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 18:09:41,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 18:09:41,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 18:09:41,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 18:09:41,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 18:09:41,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 18:09:41,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 18:09:41,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 18:09:41,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 18:09:41,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 18:09:41,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 18:09:41,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 18:09:41,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 18:09:41,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 18:09:41,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 18:09:41,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 18:09:41,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 18:09:41,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 18:09:41,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 18:09:41,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 18:09:41,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 18:09:41,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 18:09:41,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 18:09:41,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 18:09:41,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 18:09:41,281 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 18:09:41,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 18:09:41,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 18:09:41,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 18:09:41,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 18:09:41,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 18:09:41,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 18:09:41,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 18:09:41,282 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 18:09:41,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 18:09:41,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 18:09:41,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 18:09:41,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 18:09:41,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 18:09:41,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 18:09:41,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 18:09:41,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 18:09:41,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 18:09:41,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 18:09:41,285 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 18:09:41,285 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 18:09:41,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 18:09:41,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 18:09:41,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2021-12-14 18:09:41,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 18:09:41,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 18:09:41,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 18:09:41,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 18:09:41,537 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 18:09:41,538 INFO L432 ainManager$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--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-14 18:09:41,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebf6be93/6bd260c1c5f2453885f3090d9bd9129d/FLAG651edeadd [2021-12-14 18:09:42,340 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 18:09:42,341 INFO L160 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--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-14 18:09:42,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebf6be93/6bd260c1c5f2453885f3090d9bd9129d/FLAG651edeadd [2021-12-14 18:09:42,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebf6be93/6bd260c1c5f2453885f3090d9bd9129d [2021-12-14 18:09:42,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 18:09:42,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 18:09:42,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 18:09:42,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 18:09:42,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 18:09:42,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:09:42" (1/1) ... [2021-12-14 18:09:42,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5636c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:42, skipping insertion in model container [2021-12-14 18:09:42,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:09:42" (1/1) ... [2021-12-14 18:09:42,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 18:09:42,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 18:09:44,325 WARN L230 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--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-12-14 18:09:44,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 18:09:44,656 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 18:09:44,931 WARN L230 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--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-12-14 18:09:44,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 18:09:45,054 INFO L208 MainTranslator]: Completed translation [2021-12-14 18:09:45,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45 WrapperNode [2021-12-14 18:09:45,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 18:09:45,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 18:09:45,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 18:09:45,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 18:09:45,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,303 INFO L137 Inliner]: procedures = 217, calls = 1688, calls flagged for inlining = 75, calls inlined = 52, statements flattened = 3526 [2021-12-14 18:09:45,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 18:09:45,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 18:09:45,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 18:09:45,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 18:09:45,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 18:09:45,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 18:09:45,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 18:09:45,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 18:09:45,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (1/1) ... [2021-12-14 18:09:45,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 18:09:45,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 18:09:45,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 18:09:45,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 18:09:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-12-14 18:09:45,623 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-12-14 18:09:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-14 18:09:45,623 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-14 18:09:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 18:09:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 18:09:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 18:09:45,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 18:09:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-14 18:09:45,624 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-14 18:09:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-12-14 18:09:45,624 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-12-14 18:09:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2021-12-14 18:09:45,625 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2021-12-14 18:09:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_common [2021-12-14 18:09:45,625 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_common [2021-12-14 18:09:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-12-14 18:09:45,625 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-12-14 18:09:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 18:09:45,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 18:09:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-12-14 18:09:45,626 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-12-14 18:09:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 18:09:45,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 18:09:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 18:09:45,626 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 18:09:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 18:09:45,627 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 18:09:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-12-14 18:09:45,627 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-12-14 18:09:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-14 18:09:45,627 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-14 18:09:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 18:09:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-14 18:09:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 18:09:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-12-14 18:09:45,628 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-12-14 18:09:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-14 18:09:45,629 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-14 18:09:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 18:09:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 18:09:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-12-14 18:09:45,629 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-12-14 18:09:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 18:09:45,630 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 18:09:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-14 18:09:45,630 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-14 18:09:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-12-14 18:09:45,630 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-12-14 18:09:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-14 18:09:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-14 18:09:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 18:09:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-14 18:09:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-14 18:09:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-12-14 18:09:45,632 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-12-14 18:09:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 18:09:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-14 18:09:45,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-14 18:09:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 18:09:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-12-14 18:09:45,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-12-14 18:09:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 18:09:45,635 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 18:09:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-14 18:09:45,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-14 18:09:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 18:09:45,635 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 18:09:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-12-14 18:09:45,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-12-14 18:09:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 18:09:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-12-14 18:09:45,636 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-12-14 18:09:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 18:09:45,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 18:09:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-12-14 18:09:45,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-12-14 18:09:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 18:09:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 18:09:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-12-14 18:09:45,638 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-12-14 18:09:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-12-14 18:09:45,638 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-12-14 18:09:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-14 18:09:45,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-14 18:09:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-14 18:09:45,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-14 18:09:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 18:09:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-14 18:09:45,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-14 18:09:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-12-14 18:09:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-12-14 18:09:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-14 18:09:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-14 18:09:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-14 18:09:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-14 18:09:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-12-14 18:09:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-12-14 18:09:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-12-14 18:09:45,642 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-12-14 18:09:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-12-14 18:09:45,642 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-12-14 18:09:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-12-14 18:09:45,643 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-12-14 18:09:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-12-14 18:09:45,643 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-12-14 18:09:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-14 18:09:45,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-14 18:09:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 18:09:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-14 18:09:45,644 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-14 18:09:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-12-14 18:09:45,644 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-12-14 18:09:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 18:09:45,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 18:09:46,213 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 18:09:46,215 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 18:09:46,416 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 18:10:22,914 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 18:10:22,938 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 18:10:22,939 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 18:10:22,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:10:22 BoogieIcfgContainer [2021-12-14 18:10:22,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 18:10:22,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 18:10:22,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 18:10:22,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 18:10:22,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:09:42" (1/3) ... [2021-12-14 18:10:22,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddf5675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:10:22, skipping insertion in model container [2021-12-14 18:10:22,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:09:45" (2/3) ... [2021-12-14 18:10:22,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddf5675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:10:22, skipping insertion in model container [2021-12-14 18:10:22,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:10:22" (3/3) ... [2021-12-14 18:10:22,959 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-14 18:10:22,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 18:10:22,968 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 18:10:23,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 18:10:23,036 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 18:10:23,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 18:10:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2021-12-14 18:10:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 18:10:23,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 18:10:23,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 18:10:23,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 18:10:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 18:10:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1349896211, now seen corresponding path program 1 times [2021-12-14 18:10:23,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 18:10:23,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695869590] [2021-12-14 18:10:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 18:10:23,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 18:10:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:24,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 18:10:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:24,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 18:10:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:24,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 18:10:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:24,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 18:10:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 18:10:24,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 18:10:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695869590] [2021-12-14 18:10:24,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695869590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 18:10:24,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 18:10:24,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 18:10:24,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694158546] [2021-12-14 18:10:24,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 18:10:24,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 18:10:24,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 18:10:24,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 18:10:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 18:10:24,162 INFO L87 Difference]: Start difference. First operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 18:10:26,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 18:10:28,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 18:10:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 18:10:30,063 INFO L93 Difference]: Finished difference Result 1558 states and 2209 transitions. [2021-12-14 18:10:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 18:10:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-12-14 18:10:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 18:10:30,085 INFO L225 Difference]: With dead ends: 1558 [2021-12-14 18:10:30,086 INFO L226 Difference]: Without dead ends: 823 [2021-12-14 18:10:30,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 18:10:30,098 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 471 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 446 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-14 18:10:30,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1997 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 446 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-12-14 18:10:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-14 18:10:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2021-12-14 18:10:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 511 states have (on average 1.3346379647749511) internal successors, (682), 529 states have internal predecessors, (682), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-14 18:10:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 994 transitions. [2021-12-14 18:10:30,206 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 994 transitions. Word has length 39 [2021-12-14 18:10:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 18:10:30,209 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 994 transitions. [2021-12-14 18:10:30,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 18:10:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 994 transitions. [2021-12-14 18:10:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 18:10:30,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 18:10:30,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 18:10:30,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 18:10:30,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 18:10:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 18:10:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1859369301, now seen corresponding path program 1 times [2021-12-14 18:10:30,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 18:10:30,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163943325] [2021-12-14 18:10:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 18:10:30,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 18:10:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 18:10:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:30,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 18:10:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:30,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 18:10:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:30,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 18:10:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 18:10:30,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 18:10:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163943325] [2021-12-14 18:10:30,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163943325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 18:10:30,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 18:10:30,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 18:10:30,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227257644] [2021-12-14 18:10:30,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 18:10:30,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 18:10:30,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 18:10:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 18:10:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 18:10:30,811 INFO L87 Difference]: Start difference. First operand 718 states and 994 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 18:10:32,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 18:10:34,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 18:10:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 18:10:37,616 INFO L93 Difference]: Finished difference Result 2329 states and 3239 transitions. [2021-12-14 18:10:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 18:10:37,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-12-14 18:10:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 18:10:37,636 INFO L225 Difference]: With dead ends: 2329 [2021-12-14 18:10:37,636 INFO L226 Difference]: Without dead ends: 1619 [2021-12-14 18:10:37,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-14 18:10:37,643 INFO L933 BasicCegarLoop]: 1066 mSDtfsCounter, 1820 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 1002 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-14 18:10:37,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1911 Valid, 3019 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1002 Valid, 900 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-12-14 18:10:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-12-14 18:10:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1405. [2021-12-14 18:10:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3346653346653348) internal successors, (1336), 1032 states have internal predecessors, (1336), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-12-14 18:10:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1948 transitions. [2021-12-14 18:10:37,772 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1948 transitions. Word has length 39 [2021-12-14 18:10:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 18:10:37,772 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1948 transitions. [2021-12-14 18:10:37,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 18:10:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1948 transitions. [2021-12-14 18:10:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 18:10:37,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 18:10:37,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 18:10:37,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 18:10:37,786 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 18:10:37,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 18:10:37,787 INFO L85 PathProgramCache]: Analyzing trace with hash 950658258, now seen corresponding path program 1 times [2021-12-14 18:10:37,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 18:10:37,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555128481] [2021-12-14 18:10:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 18:10:37,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 18:10:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 18:10:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 18:10:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 18:10:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 18:10:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 18:10:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 18:10:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 18:10:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 18:10:38,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 18:10:38,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555128481] [2021-12-14 18:10:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555128481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 18:10:38,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 18:10:38,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 18:10:38,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510782719] [2021-12-14 18:10:38,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 18:10:38,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 18:10:38,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 18:10:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 18:10:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 18:10:38,298 INFO L87 Difference]: Start difference. First operand 1405 states and 1948 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 18:10:40,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 18:10:42,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 18:10:44,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 18:10:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 18:10:46,043 INFO L93 Difference]: Finished difference Result 1637 states and 2275 transitions. [2021-12-14 18:10:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 18:10:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-12-14 18:10:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 18:10:46,054 INFO L225 Difference]: With dead ends: 1637 [2021-12-14 18:10:46,054 INFO L226 Difference]: Without dead ends: 1626 [2021-12-14 18:10:46,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-14 18:10:46,059 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 1335 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 547 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-12-14 18:10:46,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 2480 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 612 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2021-12-14 18:10:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-12-14 18:10:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1405. [2021-12-14 18:10:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3336663336663337) internal successors, (1335), 1032 states have internal predecessors, (1335), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-12-14 18:10:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1947 transitions. [2021-12-14 18:10:46,131 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1947 transitions. Word has length 59 [2021-12-14 18:10:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 18:10:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1947 transitions. [2021-12-14 18:10:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 18:10:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1947 transitions. [2021-12-14 18:10:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 18:10:46,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 18:10:46,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 18:10:46,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 18:10:46,134 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 18:10:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 18:10:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916560, now seen corresponding path program 1 times [2021-12-14 18:10:46,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 18:10:46,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625296669] [2021-12-14 18:10:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 18:10:46,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 18:10:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 18:10:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 18:10:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 18:10:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 18:10:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 18:10:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 18:10:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 18:10:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 18:10:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 18:10:46,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 18:10:46,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625296669] [2021-12-14 18:10:46,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625296669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 18:10:46,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 18:10:46,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 18:10:46,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674086889] [2021-12-14 18:10:46,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 18:10:46,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 18:10:46,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 18:10:46,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 18:10:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 18:10:46,714 INFO L87 Difference]: Start difference. First operand 1405 states and 1947 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)