./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.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 29069a6562e86cf14ec2af6e66fde431300c67391fef8a4bef75c88d837db303 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:34:52,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:34:52,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:34:52,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:34:52,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:34:52,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:34:52,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:34:52,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:34:52,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:34:52,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:34:52,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:34:52,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:34:52,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:34:52,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:34:52,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:34:52,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:34:52,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:34:52,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:34:52,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:34:52,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:34:52,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:34:52,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:34:52,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:34:52,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:34:52,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:34:52,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:34:52,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:34:52,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:34:52,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:34:52,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:34:52,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:34:52,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:34:52,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:34:52,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:34:52,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:34:52,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:34:52,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:34:52,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:34:52,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:34:52,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:34:52,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:34:52,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:34:52,260 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:34:52,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:34:52,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:34:52,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:34:52,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:34:52,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:34:52,263 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:34:52,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:34:52,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:34:52,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:34:52,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:34:52,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:34:52,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:34:52,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:34:52,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:34:52,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:34:52,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:34:52,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:34:52,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:34:52,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:34:52,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:34:52,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:34:52,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:34:52,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:34:52,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:34:52,266 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:34:52,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:34:52,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:34:52,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:34:52,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29069a6562e86cf14ec2af6e66fde431300c67391fef8a4bef75c88d837db303 [2021-11-06 14:34:52,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:34:52,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:34:52,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:34:52,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:34:52,512 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:34:52,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-06 14:34:52,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada46a95e/0d0d5f19d6544551bfbc5b527b8afc5c/FLAGb2c5fe8fc [2021-11-06 14:34:53,335 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:34:53,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-06 14:34:53,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada46a95e/0d0d5f19d6544551bfbc5b527b8afc5c/FLAGb2c5fe8fc [2021-11-06 14:34:53,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada46a95e/0d0d5f19d6544551bfbc5b527b8afc5c [2021-11-06 14:34:53,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:34:53,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:34:53,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:34:53,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:34:53,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:34:53,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:34:53" (1/1) ... [2021-11-06 14:34:53,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30185ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:53, skipping insertion in model container [2021-11-06 14:34:53,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:34:53" (1/1) ... [2021-11-06 14:34:53,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:34:53,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:34:54,226 WARN L228 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2021-11-06 14:34:55,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:34:55,895 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:34:56,005 WARN L228 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2021-11-06 14:34:56,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:34:56,503 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:34:56,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56 WrapperNode [2021-11-06 14:34:56,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:34:56,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:34:56,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:34:56,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:34:56,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:56,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:57,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:34:57,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:34:57,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:34:57,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:34:57,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:57,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:58,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:58,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:58,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:58,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:58,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:59,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:34:59,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:34:59,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:34:59,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:34:59,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (1/1) ... [2021-11-06 14:34:59,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:34:59,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:59,361 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) [2021-11-06 14:34:59,435 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 [2021-11-06 14:34:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_reset_hw_vf [2021-11-06 14:34:59,458 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_reset_hw_vf [2021-11-06 14:34:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-06 14:34:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:34:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:34:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:34:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:34:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2021-11-06 14:34:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:34:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:34:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_write_posted_mbx [2021-11-06 14:34:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_write_posted_mbx [2021-11-06 14:34:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_init_hw_vf [2021-11-06 14:34:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_init_hw_vf [2021-11-06 14:34:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:34:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:34:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_ack [2021-11-06 14:34:59,464 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_ack [2021-11-06 14:34:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:34:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:34:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_rar_set_vf [2021-11-06 14:34:59,464 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_rar_set_vf [2021-11-06 14:34:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_check_for_link_vf [2021-11-06 14:34:59,464 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_check_for_link_vf [2021-11-06 14:34:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:34:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:34:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-06 14:34:59,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-06 14:34:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:34:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-06 14:34:59,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-06 14:34:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_msg [2021-11-06 14:34:59,465 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_msg [2021-11-06 14:34:59,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:34:59,466 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_read_posted_mbx [2021-11-06 14:34:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_read_posted_mbx [2021-11-06 14:34:59,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:34:59,466 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-06 14:35:24,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:35:24,109 INFO L299 CfgBuilder]: Removed 8531 assume(true) statements. [2021-11-06 14:35:24,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:35:24 BoogieIcfgContainer [2021-11-06 14:35:24,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:35:24,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:35:24,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:35:24,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:35:24,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:34:53" (1/3) ... [2021-11-06 14:35:24,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6af8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:35:24, skipping insertion in model container [2021-11-06 14:35:24,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:34:56" (2/3) ... [2021-11-06 14:35:24,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6af8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:35:24, skipping insertion in model container [2021-11-06 14:35:24,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:35:24" (3/3) ... [2021-11-06 14:35:24,120 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-06 14:35:24,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:35:24,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:35:24,175 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:35:24,183 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 [2021-11-06 14:35:24,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:35:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 8673 states, 8538 states have (on average 1.3836964160224876) internal successors, (11814), 8539 states have internal predecessors, (11814), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-06 14:35:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-06 14:35:24,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:24,314 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-06 14:35:24,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:24,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash -589120283, now seen corresponding path program 1 times [2021-11-06 14:35:24,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:24,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879957671] [2021-11-06 14:35:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:24,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:35:24,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:35:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879957671] [2021-11-06 14:35:24,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879957671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:35:24,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:35:24,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:35:24,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608181977] [2021-11-06 14:35:24,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:35:24,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:35:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:35:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:35:24,767 INFO L87 Difference]: Start difference. First operand has 8673 states, 8538 states have (on average 1.3836964160224876) internal successors, (11814), 8539 states have internal predecessors, (11814), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:35:26,341 INFO L93 Difference]: Finished difference Result 25908 states and 36030 transitions. [2021-11-06 14:35:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:35:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-06 14:35:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:35:26,420 INFO L225 Difference]: With dead ends: 25908 [2021-11-06 14:35:26,421 INFO L226 Difference]: Without dead ends: 16918 [2021-11-06 14:35:26,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:35:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2021-11-06 14:35:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 16918. [2021-11-06 14:35:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16918 states, 16651 states have (on average 1.3513903068884752) internal successors, (22502), 16651 states have internal predecessors, (22502), 246 states have call successors, (246), 20 states have call predecessors, (246), 20 states have return successors, (246), 246 states have call predecessors, (246), 246 states have call successors, (246) [2021-11-06 14:35:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16918 states to 16918 states and 22994 transitions. [2021-11-06 14:35:27,129 INFO L78 Accepts]: Start accepts. Automaton has 16918 states and 22994 transitions. Word has length 44 [2021-11-06 14:35:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:35:27,129 INFO L470 AbstractCegarLoop]: Abstraction has 16918 states and 22994 transitions. [2021-11-06 14:35:27,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 16918 states and 22994 transitions. [2021-11-06 14:35:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-06 14:35:27,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:27,134 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:35:27,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:35:27,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2021164542, now seen corresponding path program 1 times [2021-11-06 14:35:27,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:27,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425718597] [2021-11-06 14:35:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:27,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:35:27,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:35:27,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425718597] [2021-11-06 14:35:27,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425718597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:35:27,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:35:27,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:35:27,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871186099] [2021-11-06 14:35:27,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:35:27,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:35:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:35:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:35:27,455 INFO L87 Difference]: Start difference. First operand 16918 states and 22994 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:35:28,488 INFO L93 Difference]: Finished difference Result 33792 states and 45933 transitions. [2021-11-06 14:35:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:35:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-06 14:35:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:35:28,613 INFO L225 Difference]: With dead ends: 33792 [2021-11-06 14:35:28,614 INFO L226 Difference]: Without dead ends: 33786 [2021-11-06 14:35:28,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:35:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33786 states. [2021-11-06 14:35:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33786 to 33586. [2021-11-06 14:35:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33586 states, 33053 states have (on average 1.3521314252866607) internal successors, (44692), 33053 states have internal predecessors, (44692), 492 states have call successors, (492), 40 states have call predecessors, (492), 40 states have return successors, (492), 492 states have call predecessors, (492), 492 states have call successors, (492) [2021-11-06 14:35:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33586 states to 33586 states and 45676 transitions. [2021-11-06 14:35:29,402 INFO L78 Accepts]: Start accepts. Automaton has 33586 states and 45676 transitions. Word has length 47 [2021-11-06 14:35:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:35:29,403 INFO L470 AbstractCegarLoop]: Abstraction has 33586 states and 45676 transitions. [2021-11-06 14:35:29,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 33586 states and 45676 transitions. [2021-11-06 14:35:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-06 14:35:29,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:29,463 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:35:29,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:35:29,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2013302414, now seen corresponding path program 1 times [2021-11-06 14:35:29,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:29,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075794210] [2021-11-06 14:35:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:29,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:29,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-06 14:35:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:29,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-06 14:35:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:35:29,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:35:29,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075794210] [2021-11-06 14:35:29,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075794210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:35:29,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:35:29,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:35:29,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717081994] [2021-11-06 14:35:29,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:35:29,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:35:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:35:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:35:29,940 INFO L87 Difference]: Start difference. First operand 33586 states and 45676 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:35:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:35:49,223 INFO L93 Difference]: Finished difference Result 97226 states and 133104 transitions. [2021-11-06 14:35:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:35:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 155 [2021-11-06 14:35:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:35:49,413 INFO L225 Difference]: With dead ends: 97226 [2021-11-06 14:35:49,414 INFO L226 Difference]: Without dead ends: 63684 [2021-11-06 14:35:49,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:35:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63684 states. [2021-11-06 14:35:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63684 to 63178. [2021-11-06 14:35:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63178 states, 62177 states have (on average 1.3530083471380092) internal successors, (84126), 62177 states have internal predecessors, (84126), 920 states have call successors, (920), 80 states have call predecessors, (920), 80 states have return successors, (920), 920 states have call predecessors, (920), 920 states have call successors, (920) [2021-11-06 14:35:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63178 states to 63178 states and 85966 transitions. [2021-11-06 14:35:51,165 INFO L78 Accepts]: Start accepts. Automaton has 63178 states and 85966 transitions. Word has length 155 [2021-11-06 14:35:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:35:51,167 INFO L470 AbstractCegarLoop]: Abstraction has 63178 states and 85966 transitions. [2021-11-06 14:35:51,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:35:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 63178 states and 85966 transitions. [2021-11-06 14:35:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-06 14:35:51,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:51,247 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:35:51,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:35:51,247 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash -920622097, now seen corresponding path program 1 times [2021-11-06 14:35:51,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:51,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797534498] [2021-11-06 14:35:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:51,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:51,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-06 14:35:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-06 14:35:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:35:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:35:51,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:35:51,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797534498] [2021-11-06 14:35:51,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797534498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:35:51,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:35:51,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:35:51,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301933345] [2021-11-06 14:35:51,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:35:51,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:35:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:35:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:35:51,612 INFO L87 Difference]: Start difference. First operand 63178 states and 85966 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:36:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:36:10,560 INFO L93 Difference]: Finished difference Result 170166 states and 233282 transitions. [2021-11-06 14:36:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:36:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 171 [2021-11-06 14:36:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:36:10,851 INFO L225 Difference]: With dead ends: 170166 [2021-11-06 14:36:10,851 INFO L226 Difference]: Without dead ends: 107032 [2021-11-06 14:36:10,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:36:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107032 states. [2021-11-06 14:36:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107032 to 106194. [2021-11-06 14:36:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106194 states, 104457 states have (on average 1.3560986817542147) internal successors, (141654), 104457 states have internal predecessors, (141654), 1576 states have call successors, (1576), 160 states have call predecessors, (1576), 160 states have return successors, (1576), 1576 states have call predecessors, (1576), 1576 states have call successors, (1576) [2021-11-06 14:36:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106194 states to 106194 states and 144806 transitions. [2021-11-06 14:36:13,425 INFO L78 Accepts]: Start accepts. Automaton has 106194 states and 144806 transitions. Word has length 171 [2021-11-06 14:36:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:36:13,426 INFO L470 AbstractCegarLoop]: Abstraction has 106194 states and 144806 transitions. [2021-11-06 14:36:13,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:36:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 106194 states and 144806 transitions. [2021-11-06 14:36:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-06 14:36:13,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:36:13,536 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:36:13,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:36:13,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:36:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:36:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1438137957, now seen corresponding path program 1 times [2021-11-06 14:36:13,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:36:13,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969936273] [2021-11-06 14:36:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:36:13,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:36:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:36:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-06 14:36:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:36:13,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-06 14:36:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:36:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:36:13,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:36:13,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969936273] [2021-11-06 14:36:13,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969936273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:36:13,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:36:13,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:36:13,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407518415] [2021-11-06 14:36:13,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:36:13,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:36:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:36:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:36:13,968 INFO L87 Difference]: Start difference. First operand 106194 states and 144806 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:36:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:36:41,857 INFO L93 Difference]: Finished difference Result 263010 states and 360826 transitions. [2021-11-06 14:36:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:36:41,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 191 [2021-11-06 14:36:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:36:42,330 INFO L225 Difference]: With dead ends: 263010 [2021-11-06 14:36:42,331 INFO L226 Difference]: Without dead ends: 156860 [2021-11-06 14:36:42,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:36:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156860 states. [2021-11-06 14:36:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156860 to 155522. [2021-11-06 14:36:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155522 states, 152981 states have (on average 1.3564429569685124) internal successors, (207510), 152981 states have internal predecessors, (207510), 2300 states have call successors, (2300), 240 states have call predecessors, (2300), 240 states have return successors, (2300), 2300 states have call predecessors, (2300), 2300 states have call successors, (2300) [2021-11-06 14:36:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155522 states to 155522 states and 212110 transitions. [2021-11-06 14:36:46,314 INFO L78 Accepts]: Start accepts. Automaton has 155522 states and 212110 transitions. Word has length 191 [2021-11-06 14:36:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:36:46,315 INFO L470 AbstractCegarLoop]: Abstraction has 155522 states and 212110 transitions. [2021-11-06 14:36:46,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:36:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 155522 states and 212110 transitions. [2021-11-06 14:36:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-06 14:36:46,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:36:46,453 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:36:46,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:36:46,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:36:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:36:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1804635881, now seen corresponding path program 1 times [2021-11-06 14:36:46,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:36:46,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821972052] [2021-11-06 14:36:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:36:46,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:36:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:36:46,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-06 14:36:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:36:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-06 14:36:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:36:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:36:46,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:36:46,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821972052] [2021-11-06 14:36:46,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821972052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:36:46,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:36:46,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:36:46,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128657080] [2021-11-06 14:36:46,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:36:46,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:36:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:36:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:36:46,694 INFO L87 Difference]: Start difference. First operand 155522 states and 212110 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:37:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:37:10,665 INFO L93 Difference]: Finished difference Result 468026 states and 641948 transitions. [2021-11-06 14:37:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:37:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 191 [2021-11-06 14:37:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:37:11,692 INFO L225 Difference]: With dead ends: 468026 [2021-11-06 14:37:11,692 INFO L226 Difference]: Without dead ends: 312548 [2021-11-06 14:37:12,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:37:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312548 states. [2021-11-06 14:37:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312548 to 310046. [2021-11-06 14:37:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310046 states, 304965 states have (on average 1.3529421409014148) internal successors, (412600), 304965 states have internal predecessors, (412600), 4600 states have call successors, (4600), 480 states have call predecessors, (4600), 480 states have return successors, (4600), 4600 states have call predecessors, (4600), 4600 states have call successors, (4600) [2021-11-06 14:37:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310046 states to 310046 states and 421800 transitions. [2021-11-06 14:37:20,079 INFO L78 Accepts]: Start accepts. Automaton has 310046 states and 421800 transitions. Word has length 191 [2021-11-06 14:37:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:37:20,080 INFO L470 AbstractCegarLoop]: Abstraction has 310046 states and 421800 transitions. [2021-11-06 14:37:20,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:37:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 310046 states and 421800 transitions. [2021-11-06 14:37:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-06 14:37:20,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:37:20,902 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:37:20,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:37:20,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:37:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:37:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2082169982, now seen corresponding path program 1 times [2021-11-06 14:37:20,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:37:20,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024115241] [2021-11-06 14:37:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:37:20,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:37:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:37:21,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-06 14:37:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:37:21,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-06 14:37:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:37:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:37:21,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:37:21,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024115241] [2021-11-06 14:37:21,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024115241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:37:21,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:37:21,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:37:21,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104710087] [2021-11-06 14:37:21,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:37:21,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:37:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:37:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:37:21,138 INFO L87 Difference]: Start difference. First operand 310046 states and 421800 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)