./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-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 a78ad5bb06da9a7367e7c9e45cee20fe00113336b7bc544675fdd46fc445ae5c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:10:03,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:10:03,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:10:03,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:10:03,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:10:03,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:10:03,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:10:03,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:10:03,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:10:03,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:10:03,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:10:03,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:10:03,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:10:03,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:10:03,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:10:03,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:10:03,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:10:03,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:10:03,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:10:03,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:10:03,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:10:03,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:10:03,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:10:03,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:10:03,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:10:03,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:10:03,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:10:03,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:10:03,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:10:03,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:10:03,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:10:03,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:10:03,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:10:03,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:10:03,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:10:03,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:10:03,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:10:03,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:10:03,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:10:03,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:10:03,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:10:03,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:10:03,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:10:03,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:10:03,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:10:03,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:10:03,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:10:03,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:10:03,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:10:03,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:10:03,280 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:10:03,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:10:03,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:10:03,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:10:03,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:10:03,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:10:03,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:10:03,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:10:03,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:10:03,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:10:03,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:10:03,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:10:03,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:10:03,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:10:03,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:10:03,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:10:03,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:10:03,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:10:03,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:10:03,284 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:10:03,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:10:03,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:10:03,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:10:03,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a78ad5bb06da9a7367e7c9e45cee20fe00113336b7bc544675fdd46fc445ae5c [2021-12-21 16:10:03,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:10:03,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:10:03,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:10:03,477 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:10:03,478 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:10:03,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-21 16:10:03,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/033df45eb/a81a2470058a45fabb57e66bc390e407/FLAG54f5643f3 [2021-12-21 16:10:04,184 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:10:04,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-21 16:10:04,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/033df45eb/a81a2470058a45fabb57e66bc390e407/FLAG54f5643f3 [2021-12-21 16:10:04,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/033df45eb/a81a2470058a45fabb57e66bc390e407 [2021-12-21 16:10:04,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:10:04,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:10:04,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:10:04,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:10:04,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:10:04,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:10:04" (1/1) ... [2021-12-21 16:10:04,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67370c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:04, skipping insertion in model container [2021-12-21 16:10:04,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:10:04" (1/1) ... [2021-12-21 16:10:04,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:10:04,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:10:05,434 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[181063,181076] [2021-12-21 16:10:05,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:10:05,873 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:10:05,997 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[181063,181076] [2021-12-21 16:10:06,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:10:06,189 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:10:06,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06 WrapperNode [2021-12-21 16:10:06,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:10:06,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:10:06,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:10:06,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:10:06,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,391 INFO L137 Inliner]: procedures = 183, calls = 1615, calls flagged for inlining = 84, calls inlined = 65, statements flattened = 2934 [2021-12-21 16:10:06,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:10:06,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:10:06,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:10:06,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:10:06,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:10:06,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:10:06,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:10:06,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:10:06,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (1/1) ... [2021-12-21 16:10:06,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:10:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:06,612 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) [2021-12-21 16:10:06,639 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 [2021-12-21 16:10:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-21 16:10:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-21 16:10:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-12-21 16:10:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-12-21 16:10:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:10:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_5 [2021-12-21 16:10:06,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_5 [2021-12-21 16:10:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-12-21 16:10:06,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-12-21 16:10:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:10:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-21 16:10:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-21 16:10:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:10:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:10:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:10:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:10:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-21 16:10:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-21 16:10:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-21 16:10:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-21 16:10:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:10:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:10:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-21 16:10:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-21 16:10:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-12-21 16:10:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-12-21 16:10:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:10:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:10:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-21 16:10:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-21 16:10:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure device_unlock [2021-12-21 16:10:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure device_unlock [2021-12-21 16:10:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:10:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:10:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-12-21 16:10:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-12-21 16:10:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:10:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_skb [2021-12-21 16:10:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_skb [2021-12-21 16:10:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:10:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:10:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-12-21 16:10:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-12-21 16:10:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-12-21 16:10:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-12-21 16:10:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:10:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:10:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_rx_cb [2021-12-21 16:10:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_rx_cb [2021-12-21 16:10:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 16:10:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 16:10:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:10:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:10:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:10:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-12-21 16:10:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-12-21 16:10:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-21 16:10:06,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-21 16:10:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2021-12-21 16:10:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2021-12-21 16:10:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-21 16:10:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-21 16:10:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:10:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-12-21 16:10:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-12-21 16:10:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-12-21 16:10:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-12-21 16:10:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-21 16:10:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-21 16:10:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-21 16:10:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-21 16:10:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:10:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:10:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2021-12-21 16:10:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2021-12-21 16:10:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-21 16:10:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:10:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:10:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-12-21 16:10:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-12-21 16:10:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-21 16:10:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-21 16:10:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:10:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-12-21 16:10:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-12-21 16:10:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-21 16:10:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-21 16:10:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2021-12-21 16:10:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2021-12-21 16:10:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:10:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:10:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-12-21 16:10:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-12-21 16:10:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-12-21 16:10:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-12-21 16:10:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-12-21 16:10:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-12-21 16:10:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-12-21 16:10:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-12-21 16:10:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-21 16:10:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-21 16:10:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-12-21 16:10:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-12-21 16:10:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 16:10:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 16:10:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-12-21 16:10:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-12-21 16:10:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-21 16:10:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-21 16:10:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-21 16:10:06,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-21 16:10:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-12-21 16:10:06,677 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-12-21 16:10:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-21 16:10:06,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-21 16:10:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:10:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-21 16:10:06,678 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-21 16:10:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-12-21 16:10:06,681 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-12-21 16:10:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:10:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:10:06,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:10:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-12-21 16:10:06,683 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-12-21 16:10:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:10:06,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:10:07,208 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:10:07,211 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:10:07,421 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:10:08,175 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-21 16:10:25,150 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:10:25,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:10:25,170 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 16:10:25,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:10:25 BoogieIcfgContainer [2021-12-21 16:10:25,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:10:25,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:10:25,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:10:25,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:10:25,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:10:04" (1/3) ... [2021-12-21 16:10:25,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6ee353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:10:25, skipping insertion in model container [2021-12-21 16:10:25,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:06" (2/3) ... [2021-12-21 16:10:25,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6ee353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:10:25, skipping insertion in model container [2021-12-21 16:10:25,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:10:25" (3/3) ... [2021-12-21 16:10:25,184 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-21 16:10:25,194 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:10:25,194 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:10:25,248 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:10:25,265 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 [2021-12-21 16:10:25,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:10:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 836 states, 591 states have (on average 1.3468697123519457) internal successors, (796), 617 states have internal predecessors, (796), 190 states have call successors, (190), 55 states have call predecessors, (190), 53 states have return successors, (185), 182 states have call predecessors, (185), 185 states have call successors, (185) [2021-12-21 16:10:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 16:10:25,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:25,312 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] [2021-12-21 16:10:25,312 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -753531349, now seen corresponding path program 1 times [2021-12-21 16:10:25,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629522605] [2021-12-21 16:10:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:25,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:10:26,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629522605] [2021-12-21 16:10:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629522605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:26,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:26,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:26,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467903546] [2021-12-21 16:10:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:26,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:26,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:26,052 INFO L87 Difference]: Start difference. First operand has 836 states, 591 states have (on average 1.3468697123519457) internal successors, (796), 617 states have internal predecessors, (796), 190 states have call successors, (190), 55 states have call predecessors, (190), 53 states have return successors, (185), 182 states have call predecessors, (185), 185 states have call successors, (185) Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 16:10:28,119 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 [] [2021-12-21 16:10:30,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:32,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:35,644 INFO L93 Difference]: Finished difference Result 2794 states and 4030 transitions. [2021-12-21 16:10:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-21 16:10:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:35,676 INFO L225 Difference]: With dead ends: 2794 [2021-12-21 16:10:35,677 INFO L226 Difference]: Without dead ends: 1941 [2021-12-21 16:10:35,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:35,691 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 2235 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 1237 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2354 SdHoareTripleChecker+Valid, 3323 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1237 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:35,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2354 Valid, 3323 Invalid, 2365 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1237 Valid, 1125 Invalid, 3 Unknown, 0 Unchecked, 9.2s Time] [2021-12-21 16:10:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-12-21 16:10:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1612. [2021-12-21 16:10:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1146 states have (on average 1.3342059336823735) internal successors, (1529), 1180 states have internal predecessors, (1529), 362 states have call successors, (362), 104 states have call predecessors, (362), 103 states have return successors, (357), 351 states have call predecessors, (357), 357 states have call successors, (357) [2021-12-21 16:10:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2248 transitions. [2021-12-21 16:10:35,872 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2248 transitions. Word has length 28 [2021-12-21 16:10:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:35,873 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2248 transitions. [2021-12-21 16:10:35,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 16:10:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2248 transitions. [2021-12-21 16:10:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 16:10:35,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:35,881 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:10:35,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:10:35,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash -829331153, now seen corresponding path program 1 times [2021-12-21 16:10:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:35,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844422446] [2021-12-21 16:10:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:35,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:36,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:36,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:10:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:10:36,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844422446] [2021-12-21 16:10:36,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844422446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:36,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:36,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:36,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487624826] [2021-12-21 16:10:36,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:36,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:36,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:36,140 INFO L87 Difference]: Start difference. First operand 1612 states and 2248 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:38,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:40,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:42,169 INFO L93 Difference]: Finished difference Result 1967 states and 2756 transitions. [2021-12-21 16:10:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:10:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-12-21 16:10:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:42,182 INFO L225 Difference]: With dead ends: 1967 [2021-12-21 16:10:42,183 INFO L226 Difference]: Without dead ends: 1954 [2021-12-21 16:10:42,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:42,186 INFO L933 BasicCegarLoop]: 1077 mSDtfsCounter, 1692 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 716 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1789 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:42,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1789 Valid, 2172 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 566 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-12-21 16:10:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-12-21 16:10:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1612. [2021-12-21 16:10:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1146 states have (on average 1.3333333333333333) internal successors, (1528), 1180 states have internal predecessors, (1528), 362 states have call successors, (362), 104 states have call predecessors, (362), 103 states have return successors, (357), 351 states have call predecessors, (357), 357 states have call successors, (357) [2021-12-21 16:10:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2247 transitions. [2021-12-21 16:10:42,283 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2247 transitions. Word has length 38 [2021-12-21 16:10:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:42,285 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2247 transitions. [2021-12-21 16:10:42,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2247 transitions. [2021-12-21 16:10:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 16:10:42,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:42,289 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:10:42,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:10:42,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:42,294 INFO L85 PathProgramCache]: Analyzing trace with hash -772072851, now seen corresponding path program 1 times [2021-12-21 16:10:42,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:42,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341267051] [2021-12-21 16:10:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:42,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:10:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:10:42,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:42,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341267051] [2021-12-21 16:10:42,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341267051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:42,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:42,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:42,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115065542] [2021-12-21 16:10:42,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:42,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:42,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:42,644 INFO L87 Difference]: Start difference. First operand 1612 states and 2247 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:44,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:46,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:49,998 INFO L93 Difference]: Finished difference Result 5452 states and 7784 transitions. [2021-12-21 16:10:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-12-21 16:10:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:50,020 INFO L225 Difference]: With dead ends: 5452 [2021-12-21 16:10:50,021 INFO L226 Difference]: Without dead ends: 3858 [2021-12-21 16:10:50,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:50,033 INFO L933 BasicCegarLoop]: 1338 mSDtfsCounter, 2070 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 1163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:50,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 3557 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 1191 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-12-21 16:10:50,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2021-12-21 16:10:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3195. [2021-12-21 16:10:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 2274 states have (on average 1.3324538258575198) internal successors, (3030), 2338 states have internal predecessors, (3030), 716 states have call successors, (716), 205 states have call predecessors, (716), 204 states have return successors, (745), 699 states have call predecessors, (745), 711 states have call successors, (745) [2021-12-21 16:10:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4491 transitions. [2021-12-21 16:10:50,206 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4491 transitions. Word has length 38 [2021-12-21 16:10:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:50,207 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 4491 transitions. [2021-12-21 16:10:50,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4491 transitions. [2021-12-21 16:10:50,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 16:10:50,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:50,211 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:10:50,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:10:50,211 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1835132963, now seen corresponding path program 1 times [2021-12-21 16:10:50,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815804102] [2021-12-21 16:10:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:50,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:50,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:50,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:10:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:10:50,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815804102] [2021-12-21 16:10:50,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815804102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:50,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:50,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:50,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780343876] [2021-12-21 16:10:50,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:50,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:50,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:50,536 INFO L87 Difference]: Start difference. First operand 3195 states and 4491 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:52,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:54,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:10:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:57,454 INFO L93 Difference]: Finished difference Result 10841 states and 15828 transitions. [2021-12-21 16:10:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-12-21 16:10:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:57,500 INFO L225 Difference]: With dead ends: 10841 [2021-12-21 16:10:57,500 INFO L226 Difference]: Without dead ends: 7664 [2021-12-21 16:10:57,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:57,520 INFO L933 BasicCegarLoop]: 1299 mSDtfsCounter, 2181 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 1230 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2285 SdHoareTripleChecker+Valid, 3507 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1230 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:57,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2285 Valid, 3507 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1230 Valid, 1184 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-12-21 16:10:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-12-21 16:10:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 6530. [2021-12-21 16:10:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 4659 states have (on average 1.3243185232882593) internal successors, (6170), 4783 states have internal predecessors, (6170), 1440 states have call successors, (1440), 407 states have call predecessors, (1440), 430 states have return successors, (1683), 1435 states have call predecessors, (1683), 1435 states have call successors, (1683) [2021-12-21 16:10:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 9293 transitions. [2021-12-21 16:10:57,970 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 9293 transitions. Word has length 39 [2021-12-21 16:10:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:57,970 INFO L470 AbstractCegarLoop]: Abstraction has 6530 states and 9293 transitions. [2021-12-21 16:10:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 9293 transitions. [2021-12-21 16:10:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 16:10:57,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:57,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:10:57,974 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1054139440, now seen corresponding path program 1 times [2021-12-21 16:10:57,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:57,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035962702] [2021-12-21 16:10:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:57,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:58,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:58,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:10:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:10:58,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:58,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035962702] [2021-12-21 16:10:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035962702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:58,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:58,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:58,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698429560] [2021-12-21 16:10:58,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:58,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:58,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:58,254 INFO L87 Difference]: Start difference. First operand 6530 states and 9293 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:11:00,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:11:02,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:11:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:05,111 INFO L93 Difference]: Finished difference Result 7662 states and 11141 transitions. [2021-12-21 16:11:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:11:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-21 16:11:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:05,156 INFO L225 Difference]: With dead ends: 7662 [2021-12-21 16:11:05,156 INFO L226 Difference]: Without dead ends: 7659 [2021-12-21 16:11:05,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:11:05,163 INFO L933 BasicCegarLoop]: 1298 mSDtfsCounter, 2182 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 1228 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2285 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:05,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2285 Valid, 3498 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1228 Valid, 1175 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-12-21 16:11:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2021-12-21 16:11:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 6531. [2021-12-21 16:11:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6531 states, 4660 states have (on average 1.3242489270386266) internal successors, (6171), 4784 states have internal predecessors, (6171), 1440 states have call successors, (1440), 407 states have call predecessors, (1440), 430 states have return successors, (1683), 1435 states have call predecessors, (1683), 1435 states have call successors, (1683)