./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.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 f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 16:06:49,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 16:06:49,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 16:06:49,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 16:06:49,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 16:06:49,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 16:06:49,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 16:06:49,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 16:06:49,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 16:06:49,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 16:06:49,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 16:06:49,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 16:06:49,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 16:06:49,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 16:06:49,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 16:06:49,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 16:06:49,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 16:06:49,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 16:06:49,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 16:06:49,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 16:06:49,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 16:06:49,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 16:06:49,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 16:06:49,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 16:06:49,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 16:06:49,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 16:06:49,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 16:06:49,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 16:06:49,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 16:06:49,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 16:06:49,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 16:06:49,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 16:06:49,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 16:06:49,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 16:06:49,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 16:06:49,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 16:06:49,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 16:06:49,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 16:06:49,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 16:06:49,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 16:06:49,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 16:06:49,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 16:06:49,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 16:06:49,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 16:06:49,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 16:06:49,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 16:06:49,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 16:06:49,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 16:06:49,490 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 16:06:49,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 16:06:49,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 16:06:49,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 16:06:49,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 16:06:49,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 16:06:49,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 16:06:49,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 16:06:49,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 16:06:49,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 16:06:49,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 16:06:49,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 16:06:49,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 16:06:49,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 16:06:49,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 16:06:49,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 16:06:49,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 16:06:49,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 16:06:49,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 16:06:49,493 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 16:06:49,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 16:06:49,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 16:06:49,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 16:06:49,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 [2021-11-06 16:06:49,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 16:06:49,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 16:06:49,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 16:06:49,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 16:06:49,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 16:06:49,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-06 16:06:49,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741b26f32/e4510e607e0045b6a123249f220380a1/FLAG839dba289 [2021-11-06 16:06:50,431 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 16:06:50,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-06 16:06:50,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741b26f32/e4510e607e0045b6a123249f220380a1/FLAG839dba289 [2021-11-06 16:06:50,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741b26f32/e4510e607e0045b6a123249f220380a1 [2021-11-06 16:06:50,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 16:06:50,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 16:06:50,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 16:06:50,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 16:06:50,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 16:06:50,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:06:50" (1/1) ... [2021-11-06 16:06:50,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200df6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:50, skipping insertion in model container [2021-11-06 16:06:50,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:06:50" (1/1) ... [2021-11-06 16:06:50,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 16:06:50,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 16:06:53,027 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-06 16:06:53,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 16:06:53,117 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 16:06:53,574 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-06 16:06:53,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 16:06:53,707 INFO L208 MainTranslator]: Completed translation [2021-11-06 16:06:53,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53 WrapperNode [2021-11-06 16:06:53,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 16:06:53,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 16:06:53,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 16:06:53,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 16:06:53,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:53,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:54,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 16:06:54,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 16:06:54,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 16:06:54,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 16:06:54,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:54,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:55,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:55,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:55,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:55,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:55,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:55,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 16:06:55,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 16:06:55,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 16:06:55,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 16:06:55,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (1/1) ... [2021-11-06 16:06:56,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 16:06:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:06:56,032 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 16:06:56,042 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 16:06:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-06 16:06:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 16:06:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 16:06:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 16:06:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 16:06:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 16:06:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 16:06:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 16:06:56,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 16:06:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 16:06:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 16:06:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 16:06:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 16:06:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 16:06:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 16:06:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 16:08:04,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 16:08:04,293 INFO L299 CfgBuilder]: Removed 8575 assume(true) statements. [2021-11-06 16:08:04,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:08:04 BoogieIcfgContainer [2021-11-06 16:08:04,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 16:08:04,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 16:08:04,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 16:08:04,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 16:08:04,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 04:06:50" (1/3) ... [2021-11-06 16:08:04,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1694ba11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:08:04, skipping insertion in model container [2021-11-06 16:08:04,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:06:53" (2/3) ... [2021-11-06 16:08:04,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1694ba11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:08:04, skipping insertion in model container [2021-11-06 16:08:04,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:08:04" (3/3) ... [2021-11-06 16:08:04,307 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-06 16:08:04,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 16:08:04,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-06 16:08:04,380 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 16:08:04,385 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 16:08:04,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-06 16:08:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 8154 states, 8138 states have (on average 1.343450479233227) internal successors, (10933), 8153 states have internal predecessors, (10933), 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 16:08:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-06 16:08:04,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:04,500 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:08:04,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:04,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1393914949, now seen corresponding path program 1 times [2021-11-06 16:08:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:04,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323808317] [2021-11-06 16:08:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:04,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:05,361 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 16:08:05,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:05,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323808317] [2021-11-06 16:08:05,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323808317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:05,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:05,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:08:05,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078358643] [2021-11-06 16:08:05,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:08:05,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:08:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:08:05,393 INFO L87 Difference]: Start difference. First operand has 8154 states, 8138 states have (on average 1.343450479233227) internal successors, (10933), 8153 states have internal predecessors, (10933), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 16:08:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:06,022 INFO L93 Difference]: Finished difference Result 24436 states and 32774 transitions. [2021-11-06 16:08:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:08:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2021-11-06 16:08:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:06,080 INFO L225 Difference]: With dead ends: 24436 [2021-11-06 16:08:06,081 INFO L226 Difference]: Without dead ends: 16039 [2021-11-06 16:08:06,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:08:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16039 states. [2021-11-06 16:08:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16039 to 16011. [2021-11-06 16:08:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16011 states, 15996 states have (on average 1.2846961740435108) internal successors, (20550), 16010 states have internal predecessors, (20550), 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 16:08:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16011 states to 16011 states and 20550 transitions. [2021-11-06 16:08:06,538 INFO L78 Accepts]: Start accepts. Automaton has 16011 states and 20550 transitions. Word has length 17 [2021-11-06 16:08:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:08:06,538 INFO L470 AbstractCegarLoop]: Abstraction has 16011 states and 20550 transitions. [2021-11-06 16:08:06,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 16:08:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16011 states and 20550 transitions. [2021-11-06 16:08:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-06 16:08:06,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:06,548 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] [2021-11-06 16:08:06,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 16:08:06,549 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1538739172, now seen corresponding path program 1 times [2021-11-06 16:08:06,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:06,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039007288] [2021-11-06 16:08:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:06,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:06,751 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 16:08:06,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:06,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039007288] [2021-11-06 16:08:06,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039007288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:06,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:06,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:08:06,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312221869] [2021-11-06 16:08:06,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:08:06,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:08:06,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:08:06,753 INFO L87 Difference]: Start difference. First operand 16011 states and 20550 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 16:08:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:07,181 INFO L93 Difference]: Finished difference Result 32865 states and 42270 transitions. [2021-11-06 16:08:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:08:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2021-11-06 16:08:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:07,240 INFO L225 Difference]: With dead ends: 32865 [2021-11-06 16:08:07,241 INFO L226 Difference]: Without dead ends: 16857 [2021-11-06 16:08:07,266 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 16:08:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16857 states. [2021-11-06 16:08:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16857 to 16817. [2021-11-06 16:08:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16817 states, 16802 states have (on average 1.2902035471967623) internal successors, (21678), 16816 states have internal predecessors, (21678), 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 16:08:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16817 states to 16817 states and 21678 transitions. [2021-11-06 16:08:07,563 INFO L78 Accepts]: Start accepts. Automaton has 16817 states and 21678 transitions. Word has length 42 [2021-11-06 16:08:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:08:07,564 INFO L470 AbstractCegarLoop]: Abstraction has 16817 states and 21678 transitions. [2021-11-06 16:08:07,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 16:08:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 16817 states and 21678 transitions. [2021-11-06 16:08:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-06 16:08:07,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:07,570 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:08:07,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 16:08:07,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1876995584, now seen corresponding path program 1 times [2021-11-06 16:08:07,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:07,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148607897] [2021-11-06 16:08:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:07,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:08:07,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:07,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148607897] [2021-11-06 16:08:07,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148607897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:07,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:07,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 16:08:07,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892999594] [2021-11-06 16:08:07,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:08:07,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:08:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:08:07,845 INFO L87 Difference]: Start difference. First operand 16817 states and 21678 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 16:08:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:10,387 INFO L93 Difference]: Finished difference Result 33646 states and 43373 transitions. [2021-11-06 16:08:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:08:10,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 72 [2021-11-06 16:08:10,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:10,418 INFO L225 Difference]: With dead ends: 33646 [2021-11-06 16:08:10,419 INFO L226 Difference]: Without dead ends: 16826 [2021-11-06 16:08:10,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 16:08:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16826 states. [2021-11-06 16:08:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16826 to 16820. [2021-11-06 16:08:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16820 states, 16805 states have (on average 1.2900327283546564) internal successors, (21679), 16819 states have internal predecessors, (21679), 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 16:08:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16820 states to 16820 states and 21679 transitions. [2021-11-06 16:08:10,695 INFO L78 Accepts]: Start accepts. Automaton has 16820 states and 21679 transitions. Word has length 72 [2021-11-06 16:08:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:08:10,695 INFO L470 AbstractCegarLoop]: Abstraction has 16820 states and 21679 transitions. [2021-11-06 16:08:10,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 16:08:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 16820 states and 21679 transitions. [2021-11-06 16:08:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 16:08:10,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:10,699 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:08:10,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 16:08:10,700 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 866752574, now seen corresponding path program 1 times [2021-11-06 16:08:10,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:10,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137376106] [2021-11-06 16:08:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:10,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:08:10,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:10,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137376106] [2021-11-06 16:08:10,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137376106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:10,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:10,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 16:08:10,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337404528] [2021-11-06 16:08:10,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:08:10,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:08:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:08:10,970 INFO L87 Difference]: Start difference. First operand 16820 states and 21679 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 16:08:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:13,558 INFO L93 Difference]: Finished difference Result 33660 states and 43382 transitions. [2021-11-06 16:08:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 16:08:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 81 [2021-11-06 16:08:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:13,592 INFO L225 Difference]: With dead ends: 33660 [2021-11-06 16:08:13,592 INFO L226 Difference]: Without dead ends: 16833 [2021-11-06 16:08:13,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 16:08:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-11-06 16:08:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 16755. [2021-11-06 16:08:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16755 states, 16740 states have (on average 1.2900836320191158) internal successors, (21596), 16754 states have internal predecessors, (21596), 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 16:08:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16755 states to 16755 states and 21596 transitions. [2021-11-06 16:08:13,885 INFO L78 Accepts]: Start accepts. Automaton has 16755 states and 21596 transitions. Word has length 81 [2021-11-06 16:08:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:08:13,887 INFO L470 AbstractCegarLoop]: Abstraction has 16755 states and 21596 transitions. [2021-11-06 16:08:13,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 16:08:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16755 states and 21596 transitions. [2021-11-06 16:08:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 16:08:13,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:13,892 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:08:13,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 16:08:13,892 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1542568662, now seen corresponding path program 1 times [2021-11-06 16:08:13,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:13,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561737246] [2021-11-06 16:08:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:13,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:08:14,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:14,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561737246] [2021-11-06 16:08:14,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561737246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:14,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:14,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 16:08:14,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054108378] [2021-11-06 16:08:14,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:08:14,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:08:14,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:08:14,425 INFO L87 Difference]: Start difference. First operand 16755 states and 21596 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 16:08:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:15,176 INFO L93 Difference]: Finished difference Result 34407 states and 44434 transitions. [2021-11-06 16:08:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:08:15,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 89 [2021-11-06 16:08:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:15,204 INFO L225 Difference]: With dead ends: 34407 [2021-11-06 16:08:15,205 INFO L226 Difference]: Without dead ends: 17655 [2021-11-06 16:08:15,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:08:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17655 states. [2021-11-06 16:08:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17655 to 17545. [2021-11-06 16:08:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17530 states have (on average 1.295436394751854) internal successors, (22709), 17544 states have internal predecessors, (22709), 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 16:08:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 22709 transitions. [2021-11-06 16:08:15,501 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 22709 transitions. Word has length 89 [2021-11-06 16:08:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:08:15,503 INFO L470 AbstractCegarLoop]: Abstraction has 17545 states and 22709 transitions. [2021-11-06 16:08:15,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 16:08:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 22709 transitions. [2021-11-06 16:08:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-06 16:08:15,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:15,507 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:08:15,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 16:08:15,508 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash -894448060, now seen corresponding path program 1 times [2021-11-06 16:08:15,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:15,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755852986] [2021-11-06 16:08:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:15,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:08:16,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:16,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755852986] [2021-11-06 16:08:16,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755852986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:16,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:16,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:08:16,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837814836] [2021-11-06 16:08:16,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:08:16,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:08:16,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:08:16,046 INFO L87 Difference]: Start difference. First operand 17545 states and 22709 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 16:08:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:16,439 INFO L93 Difference]: Finished difference Result 35087 states and 45415 transitions. [2021-11-06 16:08:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:08:16,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 101 [2021-11-06 16:08:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:16,470 INFO L225 Difference]: With dead ends: 35087 [2021-11-06 16:08:16,470 INFO L226 Difference]: Without dead ends: 17545 [2021-11-06 16:08:16,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:08:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17545 states. [2021-11-06 16:08:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17545 to 17545. [2021-11-06 16:08:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17530 states have (on average 1.2953223046206503) internal successors, (22707), 17544 states have internal predecessors, (22707), 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 16:08:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 22707 transitions. [2021-11-06 16:08:16,889 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 22707 transitions. Word has length 101 [2021-11-06 16:08:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:08:16,889 INFO L470 AbstractCegarLoop]: Abstraction has 17545 states and 22707 transitions. [2021-11-06 16:08:16,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 16:08:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 22707 transitions. [2021-11-06 16:08:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-06 16:08:16,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:16,898 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:08:16,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 16:08:16,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1441944450, now seen corresponding path program 1 times [2021-11-06 16:08:16,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:16,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323465949] [2021-11-06 16:08:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:16,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:08:17,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:17,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323465949] [2021-11-06 16:08:17,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323465949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:17,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:17,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 16:08:17,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966043985] [2021-11-06 16:08:17,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 16:08:17,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 16:08:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:08:17,629 INFO L87 Difference]: Start difference. First operand 17545 states and 22707 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 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 16:08:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:27,744 INFO L93 Difference]: Finished difference Result 87149 states and 112599 transitions. [2021-11-06 16:08:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-06 16:08:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 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 101 [2021-11-06 16:08:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:27,885 INFO L225 Difference]: With dead ends: 87149 [2021-11-06 16:08:27,886 INFO L226 Difference]: Without dead ends: 69607 [2021-11-06 16:08:27,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-06 16:08:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69607 states. [2021-11-06 16:08:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69607 to 17924. [2021-11-06 16:08:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17909 states have (on average 1.297448210397007) internal successors, (23236), 17923 states have internal predecessors, (23236), 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 16:08:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 23236 transitions. [2021-11-06 16:08:28,758 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 23236 transitions. Word has length 101 [2021-11-06 16:08:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:08:28,759 INFO L470 AbstractCegarLoop]: Abstraction has 17924 states and 23236 transitions. [2021-11-06 16:08:28,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 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 16:08:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 23236 transitions. [2021-11-06 16:08:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 16:08:28,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:08:28,764 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:08:28,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 16:08:28,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:08:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:08:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash -119297466, now seen corresponding path program 1 times [2021-11-06 16:08:28,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:08:28,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229106390] [2021-11-06 16:08:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:08:28,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:08:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:08:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 16:08:29,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:08:29,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229106390] [2021-11-06 16:08:29,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229106390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:08:29,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:08:29,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 16:08:29,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523261689] [2021-11-06 16:08:29,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 16:08:29,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:08:29,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 16:08:29,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:08:29,478 INFO L87 Difference]: Start difference. First operand 17924 states and 23236 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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 16:08:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:08:57,018 INFO L93 Difference]: Finished difference Result 235438 states and 310240 transitions. [2021-11-06 16:08:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-06 16:08:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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 103 [2021-11-06 16:08:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:08:57,681 INFO L225 Difference]: With dead ends: 235438 [2021-11-06 16:08:57,681 INFO L226 Difference]: Without dead ends: 217888 [2021-11-06 16:08:57,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-11-06 16:08:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217888 states. [2021-11-06 16:09:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217888 to 17934. [2021-11-06 16:09:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17934 states, 17919 states have (on average 1.2972822144092861) internal successors, (23246), 17933 states have internal predecessors, (23246), 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 16:09:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17934 states to 17934 states and 23246 transitions. [2021-11-06 16:09:00,141 INFO L78 Accepts]: Start accepts. Automaton has 17934 states and 23246 transitions. Word has length 103 [2021-11-06 16:09:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:09:00,141 INFO L470 AbstractCegarLoop]: Abstraction has 17934 states and 23246 transitions. [2021-11-06 16:09:00,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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 16:09:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 17934 states and 23246 transitions. [2021-11-06 16:09:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-06 16:09:00,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:09:00,147 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:09:00,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 16:09:00,147 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:09:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:09:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash -704175570, now seen corresponding path program 1 times [2021-11-06 16:09:00,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:09:00,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553717452] [2021-11-06 16:09:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:09:00,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:09:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:09:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 16:09:00,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:09:00,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553717452] [2021-11-06 16:09:00,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553717452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:09:00,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:09:00,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:09:00,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593068930] [2021-11-06 16:09:00,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:09:00,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:09:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:09:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:09:00,873 INFO L87 Difference]: Start difference. First operand 17934 states and 23246 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 16:09:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:09:02,181 INFO L93 Difference]: Finished difference Result 35897 states and 46553 transitions. [2021-11-06 16:09:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:09:02,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 109 [2021-11-06 16:09:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:09:02,204 INFO L225 Difference]: With dead ends: 35897 [2021-11-06 16:09:02,205 INFO L226 Difference]: Without dead ends: 17966 [2021-11-06 16:09:02,223 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 16:09:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17966 states. [2021-11-06 16:09:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17966 to 17966. [2021-11-06 16:09:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17966 states, 17951 states have (on average 1.29675227006852) internal successors, (23278), 17965 states have internal predecessors, (23278), 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 16:09:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17966 states to 17966 states and 23278 transitions. [2021-11-06 16:09:03,553 INFO L78 Accepts]: Start accepts. Automaton has 17966 states and 23278 transitions. Word has length 109 [2021-11-06 16:09:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:09:03,553 INFO L470 AbstractCegarLoop]: Abstraction has 17966 states and 23278 transitions. [2021-11-06 16:09:03,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 16:09:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 17966 states and 23278 transitions. [2021-11-06 16:09:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-06 16:09:03,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:09:03,562 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:09:03,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 16:09:03,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:09:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:09:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1807008688, now seen corresponding path program 1 times [2021-11-06 16:09:03,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:09:03,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206560678] [2021-11-06 16:09:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:09:03,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:09:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:09:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 16:09:04,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:09:04,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206560678] [2021-11-06 16:09:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206560678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:09:04,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849727975] [2021-11-06 16:09:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:09:04,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:09:04,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:09:04,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:09:04,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 16:16:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:16:13,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 3893 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 16:16:13,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:16:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 16:16:13,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849727975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:16:13,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:16:13,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 16:16:13,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702395054] [2021-11-06 16:16:13,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:16:13,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:16:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:16:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:16:13,969 INFO L87 Difference]: Start difference. First operand 17966 states and 23278 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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 16:16:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:16:15,313 INFO L93 Difference]: Finished difference Result 35961 states and 46617 transitions. [2021-11-06 16:16:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:16:15,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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 110 [2021-11-06 16:16:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:16:15,339 INFO L225 Difference]: With dead ends: 35961 [2021-11-06 16:16:15,339 INFO L226 Difference]: Without dead ends: 17998 [2021-11-06 16:16:15,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:16:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17998 states. [2021-11-06 16:16:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17998 to 17998. [2021-11-06 16:16:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17998 states, 17983 states have (on average 1.296224211755547) internal successors, (23310), 17997 states have internal predecessors, (23310), 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 16:16:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17998 states to 17998 states and 23310 transitions. [2021-11-06 16:16:16,481 INFO L78 Accepts]: Start accepts. Automaton has 17998 states and 23310 transitions. Word has length 110 [2021-11-06 16:16:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:16:16,482 INFO L470 AbstractCegarLoop]: Abstraction has 17998 states and 23310 transitions. [2021-11-06 16:16:16,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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 16:16:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 17998 states and 23310 transitions. [2021-11-06 16:16:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-06 16:16:16,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:16:16,487 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 16:16:16,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 16:16:16,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-06 16:16:16,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-06 16:16:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:16:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1950657938, now seen corresponding path program 2 times [2021-11-06 16:16:16,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:16:16,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454925203] [2021-11-06 16:16:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:16:16,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:16:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:16:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 16:16:17,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:16:17,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454925203] [2021-11-06 16:16:17,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454925203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:16:17,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512560940] [2021-11-06 16:16:17,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 16:16:17,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:16:17,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:16:17,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:16:17,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process Killed by 15