./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-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f 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-43_2a-drivers--net--ethernet--realtek--atp.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 b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 15:52:59,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 15:52:59,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 15:52:59,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 15:52:59,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 15:52:59,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 15:52:59,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 15:52:59,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 15:52:59,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 15:52:59,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 15:52:59,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 15:52:59,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 15:52:59,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 15:52:59,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 15:52:59,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 15:52:59,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 15:52:59,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 15:52:59,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 15:52:59,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 15:52:59,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 15:52:59,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 15:52:59,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 15:52:59,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 15:52:59,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 15:52:59,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 15:52:59,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 15:52:59,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 15:52:59,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 15:52:59,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 15:52:59,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 15:52:59,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 15:52:59,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 15:52:59,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 15:52:59,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 15:52:59,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 15:52:59,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 15:52:59,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 15:52:59,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 15:52:59,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 15:52:59,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 15:52:59,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 15:52:59,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 15:52:59,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 15:52:59,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 15:52:59,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 15:52:59,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 15:52:59,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 15:52:59,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 15:52:59,485 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 15:52:59,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 15:52:59,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 15:52:59,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 15:52:59,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 15:52:59,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 15:52:59,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 15:52:59,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 15:52:59,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 15:52:59,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 15:52:59,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 15:52:59,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 15:52:59,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 15:52:59,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 15:52:59,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 15:52:59,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 15:52:59,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 15:52:59,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 15:52:59,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 15:52:59,489 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 15:52:59,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 15:52:59,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 15:52:59,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 15:52:59,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e [2021-11-07 15:52:59,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 15:52:59,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 15:52:59,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 15:52:59,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 15:52:59,732 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 15:52:59,733 INFO L432 ainManager$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-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2021-11-07 15:52:59,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b9c56211/1373404e960b4fe48dc01416971ef111/FLAGfb4942042 [2021-11-07 15:53:00,475 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 15:53:00,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2021-11-07 15:53:00,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b9c56211/1373404e960b4fe48dc01416971ef111/FLAGfb4942042 [2021-11-07 15:53:00,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b9c56211/1373404e960b4fe48dc01416971ef111 [2021-11-07 15:53:00,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 15:53:00,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 15:53:00,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 15:53:00,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 15:53:00,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 15:53:00,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:53:00" (1/1) ... [2021-11-07 15:53:00,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0e92d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:00, skipping insertion in model container [2021-11-07 15:53:00,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:53:00" (1/1) ... [2021-11-07 15:53:00,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 15:53:00,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 15:53:01,802 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-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2021-11-07 15:53:01,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 15:53:01,862 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 15:53:02,082 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-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2021-11-07 15:53:02,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 15:53:02,198 INFO L208 MainTranslator]: Completed translation [2021-11-07 15:53:02,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02 WrapperNode [2021-11-07 15:53:02,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 15:53:02,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 15:53:02,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 15:53:02,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 15:53:02,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:02,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 15:53:03,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 15:53:03,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 15:53:03,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 15:53:03,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 15:53:03,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 15:53:03,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 15:53:03,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 15:53:03,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (1/1) ... [2021-11-07 15:53:03,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 15:53:03,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 15:53:03,884 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) [2021-11-07 15:53:03,913 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 [2021-11-07 15:53:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 15:53:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 15:53:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 15:53:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 15:53:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 15:53:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 15:53:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 15:53:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 15:53:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 15:53:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 15:53:03,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 15:53:10,386 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 15:53:10,387 INFO L299 CfgBuilder]: Removed 6842 assume(true) statements. [2021-11-07 15:53:10,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:53:10 BoogieIcfgContainer [2021-11-07 15:53:10,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 15:53:10,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 15:53:10,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 15:53:10,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 15:53:10,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:53:00" (1/3) ... [2021-11-07 15:53:10,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b66b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:53:10, skipping insertion in model container [2021-11-07 15:53:10,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:02" (2/3) ... [2021-11-07 15:53:10,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b66b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:53:10, skipping insertion in model container [2021-11-07 15:53:10,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:53:10" (3/3) ... [2021-11-07 15:53:10,402 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2021-11-07 15:53:10,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 15:53:10,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-07 15:53:10,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 15:53:10,477 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 [2021-11-07 15:53:10,478 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-07 15:53:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 3847 states, 3838 states have (on average 1.1357477853048463) internal successors, (4359), 3846 states have internal predecessors, (4359), 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) [2021-11-07 15:53:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 15:53:10,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:10,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:10,565 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash 436413170, now seen corresponding path program 1 times [2021-11-07 15:53:10,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:10,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485618863] [2021-11-07 15:53:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:10,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:53:10,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:10,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485618863] [2021-11-07 15:53:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485618863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:10,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:10,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 15:53:10,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294734985] [2021-11-07 15:53:10,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:10,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 15:53:10,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 15:53:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 15:53:10,972 INFO L87 Difference]: Start difference. First operand has 3847 states, 3838 states have (on average 1.1357477853048463) internal successors, (4359), 3846 states have internal predecessors, (4359), 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 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-11-07 15:53:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:11,257 INFO L93 Difference]: Finished difference Result 7690 states and 8713 transitions. [2021-11-07 15:53:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 15:53:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 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 85 [2021-11-07 15:53:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:11,285 INFO L225 Difference]: With dead ends: 7690 [2021-11-07 15:53:11,285 INFO L226 Difference]: Without dead ends: 3827 [2021-11-07 15:53:11,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 15:53:11,299 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4337 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:11,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4337 Invalid, 0 Unknown, 0 Unchecked, 10.03ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 15:53:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-11-07 15:53:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3827. [2021-11-07 15:53:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3819 states have (on average 1.1277821419219691) internal successors, (4307), 3826 states have internal predecessors, (4307), 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) [2021-11-07 15:53:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 4307 transitions. [2021-11-07 15:53:11,433 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 4307 transitions. Word has length 85 [2021-11-07 15:53:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:11,433 INFO L470 AbstractCegarLoop]: Abstraction has 3827 states and 4307 transitions. [2021-11-07 15:53:11,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-11-07 15:53:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 4307 transitions. [2021-11-07 15:53:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 15:53:11,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:11,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:11,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 15:53:11,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1452762514, now seen corresponding path program 1 times [2021-11-07 15:53:11,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:11,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109770425] [2021-11-07 15:53:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:11,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:53:11,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:11,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109770425] [2021-11-07 15:53:11,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109770425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:11,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:11,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:53:11,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002618037] [2021-11-07 15:53:11,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:11,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:53:11,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:53:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:53:11,646 INFO L87 Difference]: Start difference. First operand 3827 states and 4307 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 15:53:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:12,071 INFO L93 Difference]: Finished difference Result 12718 states and 14353 transitions. [2021-11-07 15:53:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 15:53:12,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-07 15:53:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:12,105 INFO L225 Difference]: With dead ends: 12718 [2021-11-07 15:53:12,105 INFO L226 Difference]: Without dead ends: 8905 [2021-11-07 15:53:12,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.07ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:12,120 INFO L933 BasicCegarLoop]: 6519 mSDtfsCounter, 4637 mSDsluCounter, 8637 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4637 SdHoareTripleChecker+Valid, 15156 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.44ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.06ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:12,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4637 Valid, 15156 Invalid, 68 Unknown, 0 Unchecked, 29.44ms Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 126.06ms Time] [2021-11-07 15:53:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8905 states. [2021-11-07 15:53:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8905 to 4806. [2021-11-07 15:53:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4806 states, 4798 states have (on average 1.1304710295956648) internal successors, (5424), 4805 states have internal predecessors, (5424), 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) [2021-11-07 15:53:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 5424 transitions. [2021-11-07 15:53:12,264 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 5424 transitions. Word has length 85 [2021-11-07 15:53:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:12,265 INFO L470 AbstractCegarLoop]: Abstraction has 4806 states and 5424 transitions. [2021-11-07 15:53:12,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 15:53:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 5424 transitions. [2021-11-07 15:53:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 15:53:12,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:12,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:12,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 15:53:12,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1938859404, now seen corresponding path program 1 times [2021-11-07 15:53:12,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:12,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211283059] [2021-11-07 15:53:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:12,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:53:12,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:12,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211283059] [2021-11-07 15:53:12,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211283059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:12,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:12,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:53:12,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547596198] [2021-11-07 15:53:12,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:12,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:53:12,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:53:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:53:12,376 INFO L87 Difference]: Start difference. First operand 4806 states and 5424 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-11-07 15:53:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:12,916 INFO L93 Difference]: Finished difference Result 17613 states and 19940 transitions. [2021-11-07 15:53:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 15:53:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2021-11-07 15:53:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:12,967 INFO L225 Difference]: With dead ends: 17613 [2021-11-07 15:53:12,967 INFO L226 Difference]: Without dead ends: 12821 [2021-11-07 15:53:12,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.58ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:12,989 INFO L933 BasicCegarLoop]: 5412 mSDtfsCounter, 5751 mSDsluCounter, 8560 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5751 SdHoareTripleChecker+Valid, 13972 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.14ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.64ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:12,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5751 Valid, 13972 Invalid, 60 Unknown, 0 Unchecked, 24.14ms Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 58.64ms Time] [2021-11-07 15:53:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12821 states. [2021-11-07 15:53:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12821 to 8879. [2021-11-07 15:53:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8879 states, 8871 states have (on average 1.1307631608612332) internal successors, (10031), 8878 states have internal predecessors, (10031), 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) [2021-11-07 15:53:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 10031 transitions. [2021-11-07 15:53:13,325 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 10031 transitions. Word has length 86 [2021-11-07 15:53:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:13,327 INFO L470 AbstractCegarLoop]: Abstraction has 8879 states and 10031 transitions. [2021-11-07 15:53:13,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-11-07 15:53:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 10031 transitions. [2021-11-07 15:53:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 15:53:13,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:13,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:13,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 15:53:13,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash 390862694, now seen corresponding path program 1 times [2021-11-07 15:53:13,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:13,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041987976] [2021-11-07 15:53:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:13,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:53:13,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:13,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041987976] [2021-11-07 15:53:13,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041987976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:13,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:53:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093134833] [2021-11-07 15:53:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:13,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:53:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:53:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:53:13,471 INFO L87 Difference]: Start difference. First operand 8879 states and 10031 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 15:53:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:14,284 INFO L93 Difference]: Finished difference Result 33057 states and 37455 transitions. [2021-11-07 15:53:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 15:53:14,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-07 15:53:14,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:14,370 INFO L225 Difference]: With dead ends: 33057 [2021-11-07 15:53:14,371 INFO L226 Difference]: Without dead ends: 24192 [2021-11-07 15:53:14,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.47ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:14,401 INFO L933 BasicCegarLoop]: 5411 mSDtfsCounter, 5757 mSDsluCounter, 8560 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5757 SdHoareTripleChecker+Valid, 13971 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.60ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.26ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:14,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5757 Valid, 13971 Invalid, 60 Unknown, 0 Unchecked, 24.60ms Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 52.26ms Time] [2021-11-07 15:53:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24192 states. [2021-11-07 15:53:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24192 to 16325. [2021-11-07 15:53:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16325 states, 16317 states have (on average 1.1312128454985597) internal successors, (18458), 16324 states have internal predecessors, (18458), 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) [2021-11-07 15:53:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16325 states to 16325 states and 18458 transitions. [2021-11-07 15:53:15,088 INFO L78 Accepts]: Start accepts. Automaton has 16325 states and 18458 transitions. Word has length 87 [2021-11-07 15:53:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:15,089 INFO L470 AbstractCegarLoop]: Abstraction has 16325 states and 18458 transitions. [2021-11-07 15:53:15,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 15:53:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 16325 states and 18458 transitions. [2021-11-07 15:53:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 15:53:15,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:15,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:15,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 15:53:15,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1184389102, now seen corresponding path program 1 times [2021-11-07 15:53:15,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:15,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846742086] [2021-11-07 15:53:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:15,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:53:15,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:15,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846742086] [2021-11-07 15:53:15,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846742086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:15,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:15,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:53:15,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757489832] [2021-11-07 15:53:15,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:15,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:53:15,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:53:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:53:15,286 INFO L87 Difference]: Start difference. First operand 16325 states and 18458 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 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) [2021-11-07 15:53:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:16,420 INFO L93 Difference]: Finished difference Result 61841 states and 70116 transitions. [2021-11-07 15:53:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 15:53:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 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 88 [2021-11-07 15:53:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:16,554 INFO L225 Difference]: With dead ends: 61841 [2021-11-07 15:53:16,554 INFO L226 Difference]: Without dead ends: 45530 [2021-11-07 15:53:16,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.31ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:16,609 INFO L933 BasicCegarLoop]: 5410 mSDtfsCounter, 5763 mSDsluCounter, 8560 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5763 SdHoareTripleChecker+Valid, 13970 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.47ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.74ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:16,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5763 Valid, 13970 Invalid, 60 Unknown, 0 Unchecked, 23.47ms Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 55.74ms Time] [2021-11-07 15:53:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45530 states. [2021-11-07 15:53:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45530 to 29816. [2021-11-07 15:53:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29816 states, 29808 states have (on average 1.1317767042404723) internal successors, (33736), 29815 states have internal predecessors, (33736), 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) [2021-11-07 15:53:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29816 states to 29816 states and 33736 transitions. [2021-11-07 15:53:17,835 INFO L78 Accepts]: Start accepts. Automaton has 29816 states and 33736 transitions. Word has length 88 [2021-11-07 15:53:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:17,835 INFO L470 AbstractCegarLoop]: Abstraction has 29816 states and 33736 transitions. [2021-11-07 15:53:17,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 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) [2021-11-07 15:53:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29816 states and 33736 transitions. [2021-11-07 15:53:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 15:53:17,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:17,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:17,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 15:53:17,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -490209564, now seen corresponding path program 1 times [2021-11-07 15:53:17,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:17,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050784879] [2021-11-07 15:53:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:17,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 15:53:17,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:17,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050784879] [2021-11-07 15:53:17,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050784879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:17,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:17,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 15:53:17,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842226704] [2021-11-07 15:53:17,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:17,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 15:53:17,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 15:53:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:17,968 INFO L87 Difference]: Start difference. First operand 29816 states and 33736 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-07 15:53:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:19,626 INFO L93 Difference]: Finished difference Result 91688 states and 103876 transitions. [2021-11-07 15:53:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 15:53:19,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 92 [2021-11-07 15:53:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:19,779 INFO L225 Difference]: With dead ends: 91688 [2021-11-07 15:53:19,779 INFO L226 Difference]: Without dead ends: 61886 [2021-11-07 15:53:19,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.11ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 15:53:19,844 INFO L933 BasicCegarLoop]: 7783 mSDtfsCounter, 7972 mSDsluCounter, 18691 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7972 SdHoareTripleChecker+Valid, 26474 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.38ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.75ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:19,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7972 Valid, 26474 Invalid, 143 Unknown, 0 Unchecked, 27.38ms Time], IncrementalHoareTripleChecker [32 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 104.75ms Time] [2021-11-07 15:53:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61886 states. [2021-11-07 15:53:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61886 to 29856. [2021-11-07 15:53:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29856 states, 29848 states have (on average 1.1316001072098634) internal successors, (33776), 29855 states have internal predecessors, (33776), 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) [2021-11-07 15:53:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29856 states to 29856 states and 33776 transitions. [2021-11-07 15:53:21,279 INFO L78 Accepts]: Start accepts. Automaton has 29856 states and 33776 transitions. Word has length 92 [2021-11-07 15:53:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:21,280 INFO L470 AbstractCegarLoop]: Abstraction has 29856 states and 33776 transitions. [2021-11-07 15:53:21,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-07 15:53:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 29856 states and 33776 transitions. [2021-11-07 15:53:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 15:53:21,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:21,289 INFO L514 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] [2021-11-07 15:53:21,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 15:53:21,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:21,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2132119318, now seen corresponding path program 1 times [2021-11-07 15:53:21,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:21,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131501240] [2021-11-07 15:53:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:21,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:53:21,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:21,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131501240] [2021-11-07 15:53:21,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131501240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:21,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:21,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:53:21,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389913122] [2021-11-07 15:53:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:21,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 15:53:21,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 15:53:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 15:53:21,366 INFO L87 Difference]: Start difference. First operand 29856 states and 33776 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) [2021-11-07 15:53:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:22,850 INFO L93 Difference]: Finished difference Result 81174 states and 91829 transitions. [2021-11-07 15:53:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 15:53:22,851 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 108 [2021-11-07 15:53:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:22,967 INFO L225 Difference]: With dead ends: 81174 [2021-11-07 15:53:22,967 INFO L226 Difference]: Without dead ends: 51332 [2021-11-07 15:53:23,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.52ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 15:53:23,040 INFO L933 BasicCegarLoop]: 7462 mSDtfsCounter, 3701 mSDsluCounter, 4227 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3701 SdHoareTripleChecker+Valid, 11689 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.06ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.52ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:23,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3701 Valid, 11689 Invalid, 65 Unknown, 0 Unchecked, 10.06ms Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 66.52ms Time] [2021-11-07 15:53:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51332 states. [2021-11-07 15:53:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51332 to 47060. [2021-11-07 15:53:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47060 states, 47052 states have (on average 1.135679673552665) internal successors, (53436), 47059 states have internal predecessors, (53436), 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) [2021-11-07 15:53:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47060 states to 47060 states and 53436 transitions. [2021-11-07 15:53:24,503 INFO L78 Accepts]: Start accepts. Automaton has 47060 states and 53436 transitions. Word has length 108 [2021-11-07 15:53:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:24,504 INFO L470 AbstractCegarLoop]: Abstraction has 47060 states and 53436 transitions. [2021-11-07 15:53:24,504 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) [2021-11-07 15:53:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 47060 states and 53436 transitions. [2021-11-07 15:53:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-07 15:53:24,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:24,524 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:24,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 15:53:24,524 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:24,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1870052933, now seen corresponding path program 1 times [2021-11-07 15:53:24,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:24,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660903279] [2021-11-07 15:53:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:24,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 15:53:24,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:24,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660903279] [2021-11-07 15:53:24,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660903279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:24,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:24,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:53:24,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922803615] [2021-11-07 15:53:24,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:24,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 15:53:24,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 15:53:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 15:53:24,672 INFO L87 Difference]: Start difference. First operand 47060 states and 53436 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2021-11-07 15:53:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:26,107 INFO L93 Difference]: Finished difference Result 95514 states and 108521 transitions. [2021-11-07 15:53:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 15:53:26,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 237 [2021-11-07 15:53:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:26,186 INFO L225 Difference]: With dead ends: 95514 [2021-11-07 15:53:26,186 INFO L226 Difference]: Without dead ends: 48468 [2021-11-07 15:53:26,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.61ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 15:53:26,254 INFO L933 BasicCegarLoop]: 4283 mSDtfsCounter, 36 mSDsluCounter, 4265 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8548 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.79ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:26,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8548 Invalid, 72 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 63.79ms Time] [2021-11-07 15:53:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48468 states. [2021-11-07 15:53:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48468 to 47316. [2021-11-07 15:53:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47316 states, 47308 states have (on average 1.1349454637693412) internal successors, (53692), 47315 states have internal predecessors, (53692), 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) [2021-11-07 15:53:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47316 states to 47316 states and 53692 transitions. [2021-11-07 15:53:27,689 INFO L78 Accepts]: Start accepts. Automaton has 47316 states and 53692 transitions. Word has length 237 [2021-11-07 15:53:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:27,690 INFO L470 AbstractCegarLoop]: Abstraction has 47316 states and 53692 transitions. [2021-11-07 15:53:27,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2021-11-07 15:53:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 47316 states and 53692 transitions. [2021-11-07 15:53:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-07 15:53:27,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:27,706 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 15:53:27,707 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1525441174, now seen corresponding path program 1 times [2021-11-07 15:53:27,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:27,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779056390] [2021-11-07 15:53:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:27,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 15:53:27,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:27,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779056390] [2021-11-07 15:53:27,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779056390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 15:53:27,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729158158] [2021-11-07 15:53:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:27,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 15:53:27,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 15:53:27,835 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) [2021-11-07 15:53:27,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 15:53:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 2821 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 15:53:28,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 15:53:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 15:53:29,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 15:53:29,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729158158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:29,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 15:53:29,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 15:53:29,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668711807] [2021-11-07 15:53:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:29,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 15:53:29,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 15:53:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:29,024 INFO L87 Difference]: Start difference. First operand 47316 states and 53692 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2021-11-07 15:53:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:30,560 INFO L93 Difference]: Finished difference Result 95738 states and 108585 transitions. [2021-11-07 15:53:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 15:53:30,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 240 [2021-11-07 15:53:30,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:30,635 INFO L225 Difference]: With dead ends: 95738 [2021-11-07 15:53:30,635 INFO L226 Difference]: Without dead ends: 48436 [2021-11-07 15:53:30,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.67ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:30,690 INFO L933 BasicCegarLoop]: 4301 mSDtfsCounter, 72 mSDsluCounter, 4295 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 8596 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.22ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.85ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:30,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 8596 Invalid, 18 Unknown, 0 Unchecked, 6.22ms Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 19.85ms Time] [2021-11-07 15:53:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48436 states. [2021-11-07 15:53:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48436 to 47348. [2021-11-07 15:53:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47348 states, 47340 states have (on average 1.134854245880862) internal successors, (53724), 47347 states have internal predecessors, (53724), 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) [2021-11-07 15:53:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47348 states to 47348 states and 53724 transitions. [2021-11-07 15:53:31,903 INFO L78 Accepts]: Start accepts. Automaton has 47348 states and 53724 transitions. Word has length 240 [2021-11-07 15:53:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:31,904 INFO L470 AbstractCegarLoop]: Abstraction has 47348 states and 53724 transitions. [2021-11-07 15:53:31,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2021-11-07 15:53:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 47348 states and 53724 transitions. [2021-11-07 15:53:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-07 15:53:31,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:31,915 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:31,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 15:53:32,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 15:53:32,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash 708218715, now seen corresponding path program 1 times [2021-11-07 15:53:32,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:32,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739345807] [2021-11-07 15:53:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:32,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 15:53:32,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:32,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739345807] [2021-11-07 15:53:32,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739345807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 15:53:32,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130175383] [2021-11-07 15:53:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:32,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 15:53:32,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 15:53:32,251 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) [2021-11-07 15:53:32,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 15:53:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 15:53:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 15:53:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 15:53:33,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 15:53:33,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130175383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:33,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 15:53:33,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 15:53:33,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297474575] [2021-11-07 15:53:33,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:33,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 15:53:33,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 15:53:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:33,406 INFO L87 Difference]: Start difference. First operand 47348 states and 53724 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-07 15:53:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:35,808 INFO L93 Difference]: Finished difference Result 116814 states and 132845 transitions. [2021-11-07 15:53:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 15:53:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 253 [2021-11-07 15:53:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:35,917 INFO L225 Difference]: With dead ends: 116814 [2021-11-07 15:53:35,917 INFO L226 Difference]: Without dead ends: 69480 [2021-11-07 15:53:35,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.35ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:53:35,970 INFO L933 BasicCegarLoop]: 7437 mSDtfsCounter, 3837 mSDsluCounter, 4120 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3837 SdHoareTripleChecker+Valid, 11557 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.66ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.23ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:35,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3837 Valid, 11557 Invalid, 104 Unknown, 0 Unchecked, 10.66ms Time], IncrementalHoareTripleChecker [30 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 129.23ms Time] [2021-11-07 15:53:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69480 states. [2021-11-07 15:53:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69480 to 65176. [2021-11-07 15:53:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65176 states, 65168 states have (on average 1.1395777068499877) internal successors, (74264), 65175 states have internal predecessors, (74264), 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) [2021-11-07 15:53:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65176 states to 65176 states and 74264 transitions. [2021-11-07 15:53:38,007 INFO L78 Accepts]: Start accepts. Automaton has 65176 states and 74264 transitions. Word has length 253 [2021-11-07 15:53:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:38,007 INFO L470 AbstractCegarLoop]: Abstraction has 65176 states and 74264 transitions. [2021-11-07 15:53:38,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-07 15:53:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 65176 states and 74264 transitions. [2021-11-07 15:53:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-07 15:53:38,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:38,019 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:38,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 15:53:38,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 15:53:38,236 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1010432159, now seen corresponding path program 1 times [2021-11-07 15:53:38,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:38,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122568163] [2021-11-07 15:53:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:38,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 15:53:38,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:38,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122568163] [2021-11-07 15:53:38,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122568163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 15:53:38,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597244657] [2021-11-07 15:53:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:38,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 15:53:38,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 15:53:38,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 15:53:38,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 15:53:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 2967 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 15:53:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 15:53:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 15:53:39,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 15:53:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 15:53:40,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597244657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 15:53:40,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 15:53:40,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-07 15:53:40,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252679386] [2021-11-07 15:53:40,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 15:53:40,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 15:53:40,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:40,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 15:53:40,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 15:53:40,088 INFO L87 Difference]: Start difference. First operand 65176 states and 74264 transitions. Second operand has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 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) [2021-11-07 15:53:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:53:42,265 INFO L93 Difference]: Finished difference Result 138018 states and 157345 transitions. [2021-11-07 15:53:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 15:53:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 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 270 [2021-11-07 15:53:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:53:42,386 INFO L225 Difference]: With dead ends: 138018 [2021-11-07 15:53:42,386 INFO L226 Difference]: Without dead ends: 72856 [2021-11-07 15:53:42,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.53ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 15:53:42,480 INFO L933 BasicCegarLoop]: 4283 mSDtfsCounter, 284 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 8628 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.39ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.14ms IncrementalHoareTripleChecker+Time [2021-11-07 15:53:42,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 8628 Invalid, 231 Unknown, 0 Unchecked, 6.39ms Time], IncrementalHoareTripleChecker [85 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 172.14ms Time] [2021-11-07 15:53:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72856 states. [2021-11-07 15:53:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72856 to 71512. [2021-11-07 15:53:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71512 states, 71504 states have (on average 1.1272096665920788) internal successors, (80600), 71511 states have internal predecessors, (80600), 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) [2021-11-07 15:53:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71512 states to 71512 states and 80600 transitions. [2021-11-07 15:53:44,904 INFO L78 Accepts]: Start accepts. Automaton has 71512 states and 80600 transitions. Word has length 270 [2021-11-07 15:53:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:53:44,905 INFO L470 AbstractCegarLoop]: Abstraction has 71512 states and 80600 transitions. [2021-11-07 15:53:44,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 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) [2021-11-07 15:53:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 71512 states and 80600 transitions. [2021-11-07 15:53:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-07 15:53:44,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:53:44,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:53:44,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 15:53:45,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 15:53:45,122 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 15:53:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:53:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1582728398, now seen corresponding path program 2 times [2021-11-07 15:53:45,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:53:45,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559384059] [2021-11-07 15:53:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:53:45,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:53:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:53:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 15:53:45,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:53:45,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559384059] [2021-11-07 15:53:45,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559384059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:53:45,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:53:45,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 15:53:45,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270788879] [2021-11-07 15:53:45,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:53:45,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:53:45,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:53:45,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:53:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:53:45,259 INFO L87 Difference]: Start difference. First operand 71512 states and 80600 transitions. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 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)