./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--usb--cdc_ncm.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--usb--cdc_ncm.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 e5d904d16bfadec9650eee3419425295e6c215eb7ede78bce460c631a5749a1f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:42:05,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:42:05,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:42:05,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:42:05,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:42:05,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:42:05,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:42:05,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:42:05,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:42:05,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:42:05,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:42:05,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:42:05,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:42:05,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:42:05,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:42:05,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:42:05,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:42:05,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:42:05,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:42:05,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:42:05,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:42:05,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:42:05,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:42:05,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:42:05,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:42:05,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:42:05,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:42:05,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:42:05,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:42:05,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:42:05,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:42:05,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:42:05,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:42:05,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:42:05,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:42:05,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:42:05,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:42:05,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:42:05,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:42:05,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:42:05,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:42:05,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:42:05,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:42:05,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:42:05,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:42:05,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:42:05,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:42:05,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:42:05,156 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:42:05,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:42:05,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:42:05,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:42:05,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:42:05,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:42:05,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:42:05,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:42:05,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:42:05,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:42:05,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:42:05,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:42:05,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:42:05,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:42:05,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:42:05,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:42:05,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:42:05,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:42:05,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:42:05,159 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:42:05,159 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:42:05,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:42:05,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:42:05,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5d904d16bfadec9650eee3419425295e6c215eb7ede78bce460c631a5749a1f [2021-11-06 14:42:05,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:42:05,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:42:05,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:42:05,336 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:42:05,337 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:42:05,337 INFO L432 ainManager$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--usb--cdc_ncm.ko-entry_point.cil.out.i [2021-11-06 14:42:05,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9af84ee/0a9905e674e84b109ef545fe8e68d600/FLAG635ada984 [2021-11-06 14:42:06,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:42:06,016 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--usb--cdc_ncm.ko-entry_point.cil.out.i [2021-11-06 14:42:06,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9af84ee/0a9905e674e84b109ef545fe8e68d600/FLAG635ada984 [2021-11-06 14:42:06,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9af84ee/0a9905e674e84b109ef545fe8e68d600 [2021-11-06 14:42:06,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:42:06,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:42:06,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:42:06,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:42:06,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:42:06,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:42:06" (1/1) ... [2021-11-06 14:42:06,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f9e6c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:06, skipping insertion in model container [2021-11-06 14:42:06,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:42:06" (1/1) ... [2021-11-06 14:42:06,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:42:06,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:42:07,239 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--usb--cdc_ncm.ko-entry_point.cil.out.i[167966,167979] [2021-11-06 14:42:08,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:42:08,053 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:42:08,151 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--usb--cdc_ncm.ko-entry_point.cil.out.i[167966,167979] [2021-11-06 14:42:08,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:42:08,423 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:42:08,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08 WrapperNode [2021-11-06 14:42:08,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:42:08,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:42:08,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:42:08,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:42:08,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:08,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:08,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:42:08,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:42:08,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:42:08,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:42:08,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:08,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:08,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:08,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:09,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:09,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:09,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:09,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:42:09,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:42:09,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:42:09,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:42:09,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (1/1) ... [2021-11-06 14:42:09,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:42:09,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:42:09,637 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 14:42:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:42:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:42:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-06 14:42:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:42:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:42:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-06 14:42:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:42:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:42:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:42:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:42:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:42:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:42:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:42:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:42:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 14:42:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:42:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:42:09,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:42:09,655 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 14:47:36,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:47:36,454 INFO L299 CfgBuilder]: Removed 2849 assume(true) statements. [2021-11-06 14:47:36,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:47:36 BoogieIcfgContainer [2021-11-06 14:47:36,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:47:36,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:47:36,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:47:36,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:47:36,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:42:06" (1/3) ... [2021-11-06 14:47:36,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1194366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:47:36, skipping insertion in model container [2021-11-06 14:47:36,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:42:08" (2/3) ... [2021-11-06 14:47:36,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1194366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:47:36, skipping insertion in model container [2021-11-06 14:47:36,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:47:36" (3/3) ... [2021-11-06 14:47:36,466 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cdc_ncm.ko-entry_point.cil.out.i [2021-11-06 14:47:36,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:47:36,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:47:36,523 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:47:36,527 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 14:47:36,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:47:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 3680 states, 3678 states have (on average 1.5065252854812399) internal successors, (5541), 3679 states have internal predecessors, (5541), 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 14:47:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-06 14:47:36,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:36,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:47:36,585 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash -487043136, now seen corresponding path program 1 times [2021-11-06 14:47:36,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:36,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151570013] [2021-11-06 14:47:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:36,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:37,466 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 14:47:37,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:37,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151570013] [2021-11-06 14:47:37,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151570013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:37,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:47:37,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:47:37,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812284840] [2021-11-06 14:47:37,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:47:37,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:47:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:47:37,494 INFO L87 Difference]: Start difference. First operand has 3680 states, 3678 states have (on average 1.5065252854812399) internal successors, (5541), 3679 states have internal predecessors, (5541), 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) Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 14:47:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:47:39,948 INFO L93 Difference]: Finished difference Result 10664 states and 16105 transitions. [2021-11-06 14:47:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:47:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 122 [2021-11-06 14:47:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:47:39,994 INFO L225 Difference]: With dead ends: 10664 [2021-11-06 14:47:39,994 INFO L226 Difference]: Without dead ends: 6943 [2021-11-06 14:47:40,007 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 14:47:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-11-06 14:47:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 6943. [2021-11-06 14:47:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6943 states, 6942 states have (on average 1.4860270815326995) internal successors, (10316), 6942 states have internal predecessors, (10316), 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 14:47:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 10316 transitions. [2021-11-06 14:47:40,344 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 10316 transitions. Word has length 122 [2021-11-06 14:47:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:47:40,345 INFO L470 AbstractCegarLoop]: Abstraction has 6943 states and 10316 transitions. [2021-11-06 14:47:40,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 14:47:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 10316 transitions. [2021-11-06 14:47:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-06 14:47:40,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:40,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:47:40,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:47:40,353 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1149235761, now seen corresponding path program 1 times [2021-11-06 14:47:40,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:40,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725861389] [2021-11-06 14:47:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:40,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:40,761 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 14:47:40,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:40,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725861389] [2021-11-06 14:47:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725861389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:40,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:47:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:47:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786471461] [2021-11-06 14:47:40,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:47:40,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:47:40,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:47:40,765 INFO L87 Difference]: Start difference. First operand 6943 states and 10316 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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 14:47:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:47:41,261 INFO L93 Difference]: Finished difference Result 20335 states and 30353 transitions. [2021-11-06 14:47:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:47:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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 128 [2021-11-06 14:47:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:47:41,307 INFO L225 Difference]: With dead ends: 20335 [2021-11-06 14:47:41,307 INFO L226 Difference]: Without dead ends: 13633 [2021-11-06 14:47:41,320 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 14:47:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13633 states. [2021-11-06 14:47:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13633 to 13633. [2021-11-06 14:47:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13633 states, 13632 states have (on average 1.490243544600939) internal successors, (20315), 13632 states have internal predecessors, (20315), 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 14:47:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13633 states to 13633 states and 20315 transitions. [2021-11-06 14:47:41,573 INFO L78 Accepts]: Start accepts. Automaton has 13633 states and 20315 transitions. Word has length 128 [2021-11-06 14:47:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:47:41,573 INFO L470 AbstractCegarLoop]: Abstraction has 13633 states and 20315 transitions. [2021-11-06 14:47:41,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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 14:47:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 13633 states and 20315 transitions. [2021-11-06 14:47:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-06 14:47:41,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:41,581 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-06 14:47:41,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:47:41,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1746722557, now seen corresponding path program 1 times [2021-11-06 14:47:41,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:41,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334660399] [2021-11-06 14:47:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:41,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:47:41,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:41,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334660399] [2021-11-06 14:47:41,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334660399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:41,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:47:41,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:47:41,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445969575] [2021-11-06 14:47:41,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:47:41,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:47:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:47:41,947 INFO L87 Difference]: Start difference. First operand 13633 states and 20315 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 14:47:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:47:42,374 INFO L93 Difference]: Finished difference Result 36701 states and 54799 transitions. [2021-11-06 14:47:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:47:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 161 [2021-11-06 14:47:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:47:42,444 INFO L225 Difference]: With dead ends: 36701 [2021-11-06 14:47:42,444 INFO L226 Difference]: Without dead ends: 23314 [2021-11-06 14:47:42,468 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 14:47:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23314 states. [2021-11-06 14:47:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23314 to 23155. [2021-11-06 14:47:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23155 states, 23154 states have (on average 1.493953528547983) internal successors, (34591), 23154 states have internal predecessors, (34591), 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 14:47:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 34591 transitions. [2021-11-06 14:47:42,921 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 34591 transitions. Word has length 161 [2021-11-06 14:47:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:47:42,923 INFO L470 AbstractCegarLoop]: Abstraction has 23155 states and 34591 transitions. [2021-11-06 14:47:42,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 14:47:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 34591 transitions. [2021-11-06 14:47:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:47:42,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:42,933 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-11-06 14:47:42,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:47:42,933 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 303283693, now seen corresponding path program 1 times [2021-11-06 14:47:42,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:42,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868958735] [2021-11-06 14:47:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:42,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:47:43,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:43,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868958735] [2021-11-06 14:47:43,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868958735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:43,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:47:43,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:47:43,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113841356] [2021-11-06 14:47:43,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:47:43,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:43,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:47:43,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:47:43,276 INFO L87 Difference]: Start difference. First operand 23155 states and 34591 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 14:47:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:47:44,068 INFO L93 Difference]: Finished difference Result 61539 states and 92049 transitions. [2021-11-06 14:47:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:47:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 168 [2021-11-06 14:47:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:47:44,143 INFO L225 Difference]: With dead ends: 61539 [2021-11-06 14:47:44,143 INFO L226 Difference]: Without dead ends: 38630 [2021-11-06 14:47:44,177 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 14:47:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38630 states. [2021-11-06 14:47:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38630 to 38547. [2021-11-06 14:47:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38547 states, 38546 states have (on average 1.4956415711098427) internal successors, (57651), 38546 states have internal predecessors, (57651), 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 14:47:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38547 states to 38547 states and 57651 transitions. [2021-11-06 14:47:44,849 INFO L78 Accepts]: Start accepts. Automaton has 38547 states and 57651 transitions. Word has length 168 [2021-11-06 14:47:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:47:44,850 INFO L470 AbstractCegarLoop]: Abstraction has 38547 states and 57651 transitions. [2021-11-06 14:47:44,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 14:47:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38547 states and 57651 transitions. [2021-11-06 14:47:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-06 14:47:44,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:44,854 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:47:44,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:47:44,855 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:44,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:44,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1050737221, now seen corresponding path program 1 times [2021-11-06 14:47:44,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:44,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680295702] [2021-11-06 14:47:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:44,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:47:45,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:45,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680295702] [2021-11-06 14:47:45,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680295702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:45,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:47:45,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:47:45,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274125523] [2021-11-06 14:47:45,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:47:45,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:47:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:47:45,171 INFO L87 Difference]: Start difference. First operand 38547 states and 57651 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 14:47:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:47:46,006 INFO L93 Difference]: Finished difference Result 100357 states and 150189 transitions. [2021-11-06 14:47:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:47:46,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 174 [2021-11-06 14:47:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:47:46,150 INFO L225 Difference]: With dead ends: 100357 [2021-11-06 14:47:46,150 INFO L226 Difference]: Without dead ends: 62056 [2021-11-06 14:47:46,223 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 14:47:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62056 states. [2021-11-06 14:47:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62056 to 62027. [2021-11-06 14:47:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62027 states, 62026 states have (on average 1.4959371876309935) internal successors, (92787), 62026 states have internal predecessors, (92787), 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 14:47:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62027 states to 62027 states and 92787 transitions. [2021-11-06 14:47:47,747 INFO L78 Accepts]: Start accepts. Automaton has 62027 states and 92787 transitions. Word has length 174 [2021-11-06 14:47:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:47:47,748 INFO L470 AbstractCegarLoop]: Abstraction has 62027 states and 92787 transitions. [2021-11-06 14:47:47,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 14:47:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 62027 states and 92787 transitions. [2021-11-06 14:47:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-06 14:47:47,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:47,771 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:47:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:47:47,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1403202226, now seen corresponding path program 1 times [2021-11-06 14:47:47,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:47,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251747973] [2021-11-06 14:47:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:47,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:47:48,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:48,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251747973] [2021-11-06 14:47:48,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251747973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:48,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:47:48,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:47:48,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738352572] [2021-11-06 14:47:48,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:47:48,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:47:48,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:47:48,157 INFO L87 Difference]: Start difference. First operand 62027 states and 92787 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 14:47:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:47:51,896 INFO L93 Difference]: Finished difference Result 304167 states and 455979 transitions. [2021-11-06 14:47:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:47:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 221 [2021-11-06 14:47:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:47:52,622 INFO L225 Difference]: With dead ends: 304167 [2021-11-06 14:47:52,622 INFO L226 Difference]: Without dead ends: 242386 [2021-11-06 14:47:52,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 14:47:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242386 states. [2021-11-06 14:47:55,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242386 to 62219. [2021-11-06 14:47:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62219 states, 62218 states have (on average 1.4944067633160822) internal successors, (92979), 62218 states have internal predecessors, (92979), 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 14:47:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62219 states to 62219 states and 92979 transitions. [2021-11-06 14:47:55,249 INFO L78 Accepts]: Start accepts. Automaton has 62219 states and 92979 transitions. Word has length 221 [2021-11-06 14:47:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:47:55,250 INFO L470 AbstractCegarLoop]: Abstraction has 62219 states and 92979 transitions. [2021-11-06 14:47:55,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 14:47:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 62219 states and 92979 transitions. [2021-11-06 14:47:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-06 14:47:55,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:55,276 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:47:55,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:47:55,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1344391176, now seen corresponding path program 1 times [2021-11-06 14:47:55,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:55,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786593273] [2021-11-06 14:47:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:55,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:47:55,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:55,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786593273] [2021-11-06 14:47:55,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786593273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:55,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:47:55,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 14:47:55,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827651465] [2021-11-06 14:47:55,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:47:55,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:47:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:47:55,649 INFO L87 Difference]: Start difference. First operand 62219 states and 92979 transitions. Second operand has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 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 14:48:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:48:03,091 INFO L93 Difference]: Finished difference Result 303015 states and 454251 transitions. [2021-11-06 14:48:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:48:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 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 224 [2021-11-06 14:48:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:48:03,709 INFO L225 Difference]: With dead ends: 303015 [2021-11-06 14:48:03,709 INFO L226 Difference]: Without dead ends: 241042 [2021-11-06 14:48:03,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:48:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241042 states. [2021-11-06 14:48:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241042 to 62411. [2021-11-06 14:48:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62411 states, 62410 states have (on average 1.49134754045826) internal successors, (93075), 62410 states have internal predecessors, (93075), 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 14:48:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62411 states to 62411 states and 93075 transitions. [2021-11-06 14:48:06,857 INFO L78 Accepts]: Start accepts. Automaton has 62411 states and 93075 transitions. Word has length 224 [2021-11-06 14:48:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:48:06,859 INFO L470 AbstractCegarLoop]: Abstraction has 62411 states and 93075 transitions. [2021-11-06 14:48:06,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 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 14:48:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 62411 states and 93075 transitions. [2021-11-06 14:48:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-06 14:48:06,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:48:06,885 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:06,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:48:06,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:48:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:48:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1682825085, now seen corresponding path program 1 times [2021-11-06 14:48:06,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:48:06,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438215130] [2021-11-06 14:48:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:48:06,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:48:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:48:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:48:07,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:48:07,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438215130] [2021-11-06 14:48:07,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438215130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:48:07,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:48:07,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 14:48:07,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467301184] [2021-11-06 14:48:07,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:48:07,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:48:07,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:48:07,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:48:07,496 INFO L87 Difference]: Start difference. First operand 62411 states and 93075 transitions. Second operand has 6 states, 6 states have (on average 37.666666666666664) internal successors, (226), 6 states have internal predecessors, (226), 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)