./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.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 cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:27:17,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:27:17,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:27:17,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:27:17,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:27:17,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:27:17,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:27:17,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:27:17,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:27:17,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:27:17,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:27:17,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:27:17,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:27:17,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:27:17,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:27:17,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:27:17,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:27:17,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:27:17,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:27:17,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:27:17,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:27:17,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:27:17,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:27:17,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:27:17,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:27:17,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:27:17,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:27:17,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:27:17,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:27:17,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:27:17,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:27:17,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:27:17,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:27:17,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:27:17,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:27:17,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:27:17,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:27:17,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:27:17,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:27:17,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:27:17,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:27:17,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:27:17,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:27:17,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:27:17,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:27:17,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:27:17,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:27:17,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:27:17,717 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:27:17,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:27:17,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:27:17,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:27:17,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:27:17,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:27:17,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:27:17,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:27:17,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:27:17,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:27:17,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:27:17,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:27:17,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:27:17,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:27:17,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:27:17,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:27:17,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:27:17,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:27:17,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:27:17,721 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:27:17,721 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:27:17,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:27:17,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:27:17,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2021-11-06 14:27:17,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:27:17,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:27:17,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:27:17,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:27:17,928 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:27:17,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-06 14:27:17,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10eba6e9/049f70d327a645e88fad4393725750e6/FLAG48a35ad3e [2021-11-06 14:27:18,584 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:27:18,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-06 14:27:18,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10eba6e9/049f70d327a645e88fad4393725750e6/FLAG48a35ad3e [2021-11-06 14:27:18,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10eba6e9/049f70d327a645e88fad4393725750e6 [2021-11-06 14:27:18,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:27:18,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:27:18,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:27:18,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:27:18,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:27:18,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:27:18" (1/1) ... [2021-11-06 14:27:18,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1190928f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:18, skipping insertion in model container [2021-11-06 14:27:18,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:27:18" (1/1) ... [2021-11-06 14:27:18,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:27:18,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:27:19,318 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-06 14:27:19,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:27:19,488 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:27:19,593 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-06 14:27:19,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:27:19,661 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:27:19,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19 WrapperNode [2021-11-06 14:27:19,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:27:19,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:27:19,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:27:19,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:27:19,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:27:19,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:27:19,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:27:19,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:27:19,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:27:19,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:27:19,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:27:19,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:27:19,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (1/1) ... [2021-11-06 14:27:19,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:27:19,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:19,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 14:27:19,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 14:27:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:27:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:27:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:27:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:27:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:27:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:27:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:27:19,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:27:20,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:27:20,549 INFO L299 CfgBuilder]: Removed 109 assume(true) statements. [2021-11-06 14:27:20,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:27:20 BoogieIcfgContainer [2021-11-06 14:27:20,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:27:20,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:27:20,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:27:20,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:27:20,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:27:18" (1/3) ... [2021-11-06 14:27:20,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1728e2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:27:20, skipping insertion in model container [2021-11-06 14:27:20,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:27:19" (2/3) ... [2021-11-06 14:27:20,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1728e2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:27:20, skipping insertion in model container [2021-11-06 14:27:20,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:27:20" (3/3) ... [2021-11-06 14:27:20,557 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-06 14:27:20,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:27:20,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:27:20,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:27:20,609 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 14:27:20,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:27:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-06 14:27:20,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:20,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:27:20,644 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash -695882203, now seen corresponding path program 1 times [2021-11-06 14:27:20,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:20,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865107050] [2021-11-06 14:27:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:20,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:27:20,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:20,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865107050] [2021-11-06 14:27:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865107050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:20,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:20,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:27:20,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116698667] [2021-11-06 14:27:20,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:27:20,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:20,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:27:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:20,901 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:20,960 INFO L93 Difference]: Finished difference Result 365 states and 550 transitions. [2021-11-06 14:27:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:27:20,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-11-06 14:27:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:20,968 INFO L225 Difference]: With dead ends: 365 [2021-11-06 14:27:20,969 INFO L226 Difference]: Without dead ends: 224 [2021-11-06 14:27:20,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-06 14:27:21,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-11-06 14:27:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.399103139013453) internal successors, (312), 223 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2021-11-06 14:27:21,032 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 18 [2021-11-06 14:27:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:21,035 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2021-11-06 14:27:21,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2021-11-06 14:27:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-06 14:27:21,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:21,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:27:21,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:27:21,038 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:21,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1030357496, now seen corresponding path program 1 times [2021-11-06 14:27:21,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:21,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857587247] [2021-11-06 14:27:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:21,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:27:21,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:21,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857587247] [2021-11-06 14:27:21,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857587247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:21,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:21,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:27:21,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093811974] [2021-11-06 14:27:21,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:27:21,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:27:21,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:21,099 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:21,117 INFO L93 Difference]: Finished difference Result 442 states and 618 transitions. [2021-11-06 14:27:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:27:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2021-11-06 14:27:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:21,119 INFO L225 Difference]: With dead ends: 442 [2021-11-06 14:27:21,119 INFO L226 Difference]: Without dead ends: 228 [2021-11-06 14:27:21,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-06 14:27:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2021-11-06 14:27:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.3973214285714286) internal successors, (313), 224 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 313 transitions. [2021-11-06 14:27:21,135 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 313 transitions. Word has length 24 [2021-11-06 14:27:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:21,135 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 313 transitions. [2021-11-06 14:27:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 313 transitions. [2021-11-06 14:27:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-06 14:27:21,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:21,137 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:27:21,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:27:21,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:21,139 INFO L85 PathProgramCache]: Analyzing trace with hash 801577585, now seen corresponding path program 1 times [2021-11-06 14:27:21,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:21,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720944097] [2021-11-06 14:27:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:21,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:27:21,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:21,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720944097] [2021-11-06 14:27:21,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720944097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:21,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632975853] [2021-11-06 14:27:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:21,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:21,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:21,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:21,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:27:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:27:21,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:27:21,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632975853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:21,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:21,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:27:21,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924118135] [2021-11-06 14:27:21,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:27:21,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:27:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:27:21,501 INFO L87 Difference]: Start difference. First operand 225 states and 313 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:21,543 INFO L93 Difference]: Finished difference Result 447 states and 624 transitions. [2021-11-06 14:27:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:27:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 28 [2021-11-06 14:27:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:21,544 INFO L225 Difference]: With dead ends: 447 [2021-11-06 14:27:21,544 INFO L226 Difference]: Without dead ends: 232 [2021-11-06 14:27:21,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:27:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-06 14:27:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2021-11-06 14:27:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.394736842105263) internal successors, (318), 228 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 318 transitions. [2021-11-06 14:27:21,553 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 318 transitions. Word has length 28 [2021-11-06 14:27:21,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:21,553 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 318 transitions. [2021-11-06 14:27:21,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 318 transitions. [2021-11-06 14:27:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-06 14:27:21,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:21,555 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:27:21,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:21,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:21,768 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash 75583082, now seen corresponding path program 2 times [2021-11-06 14:27:21,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:21,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298626173] [2021-11-06 14:27:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:21,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:27:21,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:21,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298626173] [2021-11-06 14:27:21,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298626173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:21,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:21,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:27:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705095962] [2021-11-06 14:27:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:27:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:27:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:27:21,840 INFO L87 Difference]: Start difference. First operand 229 states and 318 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:21,865 INFO L93 Difference]: Finished difference Result 447 states and 622 transitions. [2021-11-06 14:27:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:27:21,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 32 [2021-11-06 14:27:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:21,867 INFO L225 Difference]: With dead ends: 447 [2021-11-06 14:27:21,867 INFO L226 Difference]: Without dead ends: 228 [2021-11-06 14:27:21,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:27:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-06 14:27:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-11-06 14:27:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3832599118942732) internal successors, (314), 227 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 314 transitions. [2021-11-06 14:27:21,895 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 314 transitions. Word has length 32 [2021-11-06 14:27:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:21,895 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 314 transitions. [2021-11-06 14:27:21,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 314 transitions. [2021-11-06 14:27:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 14:27:21,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:21,901 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:27:21,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:27:21,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2035682629, now seen corresponding path program 1 times [2021-11-06 14:27:21,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:21,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128527103] [2021-11-06 14:27:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:21,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:27:22,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:22,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128527103] [2021-11-06 14:27:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128527103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:22,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:22,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:27:22,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567572141] [2021-11-06 14:27:22,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:27:22,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:27:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:27:22,026 INFO L87 Difference]: Start difference. First operand 228 states and 314 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:22,077 INFO L93 Difference]: Finished difference Result 662 states and 917 transitions. [2021-11-06 14:27:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:27:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 43 [2021-11-06 14:27:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:22,080 INFO L225 Difference]: With dead ends: 662 [2021-11-06 14:27:22,080 INFO L226 Difference]: Without dead ends: 440 [2021-11-06 14:27:22,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:27:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-06 14:27:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 432. [2021-11-06 14:27:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.3874709976798143) internal successors, (598), 431 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 598 transitions. [2021-11-06 14:27:22,092 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 598 transitions. Word has length 43 [2021-11-06 14:27:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:22,094 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 598 transitions. [2021-11-06 14:27:22,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 598 transitions. [2021-11-06 14:27:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 14:27:22,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:22,100 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:27:22,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:27:22,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1373226942, now seen corresponding path program 1 times [2021-11-06 14:27:22,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:22,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293409990] [2021-11-06 14:27:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:22,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:27:22,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:22,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293409990] [2021-11-06 14:27:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293409990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:22,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:22,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:27:22,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256267659] [2021-11-06 14:27:22,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:27:22,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:27:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:22,151 INFO L87 Difference]: Start difference. First operand 432 states and 598 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:22,174 INFO L93 Difference]: Finished difference Result 741 states and 1024 transitions. [2021-11-06 14:27:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:27:22,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 68 [2021-11-06 14:27:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:22,176 INFO L225 Difference]: With dead ends: 741 [2021-11-06 14:27:22,176 INFO L226 Difference]: Without dead ends: 319 [2021-11-06 14:27:22,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-06 14:27:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 287. [2021-11-06 14:27:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3846153846153846) internal successors, (396), 286 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 396 transitions. [2021-11-06 14:27:22,188 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 396 transitions. Word has length 68 [2021-11-06 14:27:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:22,188 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 396 transitions. [2021-11-06 14:27:22,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 396 transitions. [2021-11-06 14:27:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 14:27:22,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:22,190 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:27:22,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:27:22,191 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1791204372, now seen corresponding path program 2 times [2021-11-06 14:27:22,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:22,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323665700] [2021-11-06 14:27:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:22,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:27:22,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:22,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323665700] [2021-11-06 14:27:22,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323665700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:22,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:22,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:27:22,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333146670] [2021-11-06 14:27:22,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:27:22,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:27:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:27:22,294 INFO L87 Difference]: Start difference. First operand 287 states and 396 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:22,352 INFO L93 Difference]: Finished difference Result 1182 states and 1646 transitions. [2021-11-06 14:27:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:27:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 68 [2021-11-06 14:27:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:22,357 INFO L225 Difference]: With dead ends: 1182 [2021-11-06 14:27:22,357 INFO L226 Difference]: Without dead ends: 918 [2021-11-06 14:27:22,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:27:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-06 14:27:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 291. [2021-11-06 14:27:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.3793103448275863) internal successors, (400), 290 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 400 transitions. [2021-11-06 14:27:22,377 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 400 transitions. Word has length 68 [2021-11-06 14:27:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:22,377 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 400 transitions. [2021-11-06 14:27:22,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 400 transitions. [2021-11-06 14:27:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-06 14:27:22,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:22,379 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:27:22,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:27:22,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash -556496385, now seen corresponding path program 1 times [2021-11-06 14:27:22,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:22,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569829128] [2021-11-06 14:27:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:22,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:27:22,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:22,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569829128] [2021-11-06 14:27:22,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569829128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:22,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:22,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 14:27:22,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10786026] [2021-11-06 14:27:22,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:27:22,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:27:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:27:22,465 INFO L87 Difference]: Start difference. First operand 291 states and 400 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:22,720 INFO L93 Difference]: Finished difference Result 1334 states and 1858 transitions. [2021-11-06 14:27:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-06 14:27:22,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 71 [2021-11-06 14:27:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:22,724 INFO L225 Difference]: With dead ends: 1334 [2021-11-06 14:27:22,725 INFO L226 Difference]: Without dead ends: 1066 [2021-11-06 14:27:22,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:27:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-11-06 14:27:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 295. [2021-11-06 14:27:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.3741496598639455) internal successors, (404), 294 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 404 transitions. [2021-11-06 14:27:22,743 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 404 transitions. Word has length 71 [2021-11-06 14:27:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:22,743 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 404 transitions. [2021-11-06 14:27:22,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 404 transitions. [2021-11-06 14:27:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-06 14:27:22,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:22,744 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:27:22,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:27:22,745 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash -435812668, now seen corresponding path program 1 times [2021-11-06 14:27:22,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:22,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99347663] [2021-11-06 14:27:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:22,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:27:22,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:22,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99347663] [2021-11-06 14:27:22,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99347663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:22,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741284221] [2021-11-06 14:27:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:22,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:22,795 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:22,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:27:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:22,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:27:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:27:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741284221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:23,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:23,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 14:27:23,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801328787] [2021-11-06 14:27:23,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:27:23,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:27:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:27:23,079 INFO L87 Difference]: Start difference. First operand 295 states and 404 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:23,125 INFO L93 Difference]: Finished difference Result 581 states and 799 transitions. [2021-11-06 14:27:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:27:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 73 [2021-11-06 14:27:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:23,128 INFO L225 Difference]: With dead ends: 581 [2021-11-06 14:27:23,128 INFO L226 Difference]: Without dead ends: 309 [2021-11-06 14:27:23,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:27:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-06 14:27:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2021-11-06 14:27:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.3708609271523178) internal successors, (414), 302 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 414 transitions. [2021-11-06 14:27:23,141 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 414 transitions. Word has length 73 [2021-11-06 14:27:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:23,142 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 414 transitions. [2021-11-06 14:27:23,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 414 transitions. [2021-11-06 14:27:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 14:27:23,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:23,143 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-06 14:27:23,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:23,361 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,SelfDestructingSolverStorable8 [2021-11-06 14:27:23,362 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1374981269, now seen corresponding path program 2 times [2021-11-06 14:27:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:23,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862035784] [2021-11-06 14:27:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:23,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:27:23,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:23,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862035784] [2021-11-06 14:27:23,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862035784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:23,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977785007] [2021-11-06 14:27:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:27:23,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:23,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:23,417 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) [2021-11-06 14:27:23,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:27:23,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 14:27:23,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:23,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:27:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 14:27:23,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977785007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:23,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:27:23,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-06 14:27:23,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994447795] [2021-11-06 14:27:23,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:27:23,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:27:23,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:27:23,757 INFO L87 Difference]: Start difference. First operand 303 states and 414 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:23,773 INFO L93 Difference]: Finished difference Result 598 states and 819 transitions. [2021-11-06 14:27:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:27:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 77 [2021-11-06 14:27:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:23,774 INFO L225 Difference]: With dead ends: 598 [2021-11-06 14:27:23,774 INFO L226 Difference]: Without dead ends: 304 [2021-11-06 14:27:23,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:27:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-06 14:27:23,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-11-06 14:27:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.3696369636963697) internal successors, (415), 303 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2021-11-06 14:27:23,788 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 77 [2021-11-06 14:27:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:23,789 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2021-11-06 14:27:23,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2021-11-06 14:27:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-06 14:27:23,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:23,790 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-06 14:27:23,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:24,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:24,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:24,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1869626458, now seen corresponding path program 1 times [2021-11-06 14:27:24,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:24,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620170678] [2021-11-06 14:27:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:24,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:24,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:24,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620170678] [2021-11-06 14:27:24,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620170678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:24,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676378129] [2021-11-06 14:27:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:24,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:24,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:24,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:24,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 14:27:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:27:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:24,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676378129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:24,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:24,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 14:27:24,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884303776] [2021-11-06 14:27:24,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:27:24,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:27:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:27:24,407 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:24,438 INFO L93 Difference]: Finished difference Result 598 states and 820 transitions. [2021-11-06 14:27:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:27:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 78 [2021-11-06 14:27:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:24,441 INFO L225 Difference]: With dead ends: 598 [2021-11-06 14:27:24,441 INFO L226 Difference]: Without dead ends: 318 [2021-11-06 14:27:24,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:27:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-06 14:27:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2021-11-06 14:27:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.3665594855305465) internal successors, (425), 311 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 425 transitions. [2021-11-06 14:27:24,461 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 425 transitions. Word has length 78 [2021-11-06 14:27:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:24,463 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 425 transitions. [2021-11-06 14:27:24,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 425 transitions. [2021-11-06 14:27:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 14:27:24,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:24,464 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-11-06 14:27:24,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:24,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:24,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:24,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1704259073, now seen corresponding path program 2 times [2021-11-06 14:27:24,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:24,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275064821] [2021-11-06 14:27:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:24,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:24,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:24,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275064821] [2021-11-06 14:27:24,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275064821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:24,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844379] [2021-11-06 14:27:24,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:27:24,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:24,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:24,745 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:24,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 14:27:24,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:27:24,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:27:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:25,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:25,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:25,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-06 14:27:25,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417151599] [2021-11-06 14:27:25,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:27:25,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:27:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:27:25,088 INFO L87 Difference]: Start difference. First operand 312 states and 425 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2021-11-06 14:27:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:25,120 INFO L93 Difference]: Finished difference Result 614 states and 840 transitions. [2021-11-06 14:27:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:27:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 82 [2021-11-06 14:27:25,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:25,121 INFO L225 Difference]: With dead ends: 614 [2021-11-06 14:27:25,121 INFO L226 Difference]: Without dead ends: 326 [2021-11-06 14:27:25,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:27:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-06 14:27:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 320. [2021-11-06 14:27:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.3636363636363635) internal successors, (435), 319 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 435 transitions. [2021-11-06 14:27:25,134 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 435 transitions. Word has length 82 [2021-11-06 14:27:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:25,134 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 435 transitions. [2021-11-06 14:27:25,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2021-11-06 14:27:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 435 transitions. [2021-11-06 14:27:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 14:27:25,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:25,135 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 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] [2021-11-06 14:27:25,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:25,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-06 14:27:25,356 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1898607656, now seen corresponding path program 3 times [2021-11-06 14:27:25,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:25,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039654133] [2021-11-06 14:27:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:25,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:25,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:25,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039654133] [2021-11-06 14:27:25,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039654133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:25,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164079443] [2021-11-06 14:27:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:27:25,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:25,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:25,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 14:27:25,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:27:25,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:25,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-06 14:27:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-06 14:27:25,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164079443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:25,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:27:25,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2021-11-06 14:27:25,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203819497] [2021-11-06 14:27:25,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:27:25,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:27:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:27:25,987 INFO L87 Difference]: Start difference. First operand 320 states and 435 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:26,868 INFO L93 Difference]: Finished difference Result 1610 states and 2226 transitions. [2021-11-06 14:27:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-06 14:27:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 [2021-11-06 14:27:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:26,872 INFO L225 Difference]: With dead ends: 1610 [2021-11-06 14:27:26,873 INFO L226 Difference]: Without dead ends: 1314 [2021-11-06 14:27:26,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-11-06 14:27:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-11-06 14:27:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 334. [2021-11-06 14:27:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.3483483483483483) internal successors, (449), 333 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 449 transitions. [2021-11-06 14:27:26,905 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 449 transitions. Word has length 86 [2021-11-06 14:27:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 449 transitions. [2021-11-06 14:27:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 449 transitions. [2021-11-06 14:27:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-06 14:27:26,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:26,907 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 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] [2021-11-06 14:27:26,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:27,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:27,115 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -781066167, now seen corresponding path program 1 times [2021-11-06 14:27:27,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:27,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543254269] [2021-11-06 14:27:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:27,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-06 14:27:27,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:27,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543254269] [2021-11-06 14:27:27,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543254269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:27,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:27,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:27:27,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514572316] [2021-11-06 14:27:27,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:27:27,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:27:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:27,181 INFO L87 Difference]: Start difference. First operand 334 states and 449 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:27,221 INFO L93 Difference]: Finished difference Result 789 states and 1064 transitions. [2021-11-06 14:27:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:27:27,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 95 [2021-11-06 14:27:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:27,224 INFO L225 Difference]: With dead ends: 789 [2021-11-06 14:27:27,224 INFO L226 Difference]: Without dead ends: 629 [2021-11-06 14:27:27,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:27:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-06 14:27:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 336. [2021-11-06 14:27:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.346268656716418) internal successors, (451), 335 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 451 transitions. [2021-11-06 14:27:27,246 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 451 transitions. Word has length 95 [2021-11-06 14:27:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:27,246 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 451 transitions. [2021-11-06 14:27:27,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:27,246 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 451 transitions. [2021-11-06 14:27:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 14:27:27,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:27,249 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 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] [2021-11-06 14:27:27,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 14:27:27,250 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1480904504, now seen corresponding path program 1 times [2021-11-06 14:27:27,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:27,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841192603] [2021-11-06 14:27:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:27,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-06 14:27:27,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:27,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841192603] [2021-11-06 14:27:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841192603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:27,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:27,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:27:27,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023123182] [2021-11-06 14:27:27,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:27:27,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:27:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:27:27,329 INFO L87 Difference]: Start difference. First operand 336 states and 451 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:27,374 INFO L93 Difference]: Finished difference Result 787 states and 1059 transitions. [2021-11-06 14:27:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:27:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 97 [2021-11-06 14:27:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:27,376 INFO L225 Difference]: With dead ends: 787 [2021-11-06 14:27:27,376 INFO L226 Difference]: Without dead ends: 475 [2021-11-06 14:27:27,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:27:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-06 14:27:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 333. [2021-11-06 14:27:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.3403614457831325) internal successors, (445), 332 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 445 transitions. [2021-11-06 14:27:27,410 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 445 transitions. Word has length 97 [2021-11-06 14:27:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:27,410 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 445 transitions. [2021-11-06 14:27:27,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 445 transitions. [2021-11-06 14:27:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-06 14:27:27,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:27,412 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 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] [2021-11-06 14:27:27,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 14:27:27,412 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -179577352, now seen corresponding path program 1 times [2021-11-06 14:27:27,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:27,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155932622] [2021-11-06 14:27:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:27,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:27,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:27,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155932622] [2021-11-06 14:27:27,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155932622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:27,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433850476] [2021-11-06 14:27:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:27,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:27,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:27,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:27,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 14:27:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:27,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:27:27,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:27,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433850476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:27,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:27,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-06 14:27:27,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735843960] [2021-11-06 14:27:27,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:27:27,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:27,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:27:27,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:27:27,933 INFO L87 Difference]: Start difference. First operand 333 states and 445 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:27,979 INFO L93 Difference]: Finished difference Result 656 states and 880 transitions. [2021-11-06 14:27:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:27:27,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-06 14:27:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:27,981 INFO L225 Difference]: With dead ends: 656 [2021-11-06 14:27:27,981 INFO L226 Difference]: Without dead ends: 347 [2021-11-06 14:27:27,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:27:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-06 14:27:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 341. [2021-11-06 14:27:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.338235294117647) internal successors, (455), 340 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 455 transitions. [2021-11-06 14:27:28,002 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 455 transitions. Word has length 101 [2021-11-06 14:27:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:28,002 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 455 transitions. [2021-11-06 14:27:28,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 455 transitions. [2021-11-06 14:27:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-06 14:27:28,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:28,003 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2021-11-06 14:27:28,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:28,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:28,215 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash -814464911, now seen corresponding path program 2 times [2021-11-06 14:27:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:28,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394163446] [2021-11-06 14:27:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:28,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:28,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:28,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394163446] [2021-11-06 14:27:28,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394163446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:28,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449490297] [2021-11-06 14:27:28,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:27:28,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:28,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:28,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 14:27:28,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:27:28,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:28,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 14:27:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:28,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449490297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:28,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:28,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-06 14:27:28,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903705886] [2021-11-06 14:27:28,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:27:28,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:27:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:27:28,807 INFO L87 Difference]: Start difference. First operand 341 states and 455 transitions. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:28,859 INFO L93 Difference]: Finished difference Result 672 states and 900 transitions. [2021-11-06 14:27:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:27:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 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 105 [2021-11-06 14:27:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:28,861 INFO L225 Difference]: With dead ends: 672 [2021-11-06 14:27:28,861 INFO L226 Difference]: Without dead ends: 355 [2021-11-06 14:27:28,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:27:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-06 14:27:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 349. [2021-11-06 14:27:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.3362068965517242) internal successors, (465), 348 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 465 transitions. [2021-11-06 14:27:28,884 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 465 transitions. Word has length 105 [2021-11-06 14:27:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:28,885 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 465 transitions. [2021-11-06 14:27:28,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 465 transitions. [2021-11-06 14:27:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-06 14:27:28,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:28,886 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 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] [2021-11-06 14:27:28,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:29,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-06 14:27:29,100 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1052459414, now seen corresponding path program 3 times [2021-11-06 14:27:29,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:29,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958390] [2021-11-06 14:27:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:29,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:27:29,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:29,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958390] [2021-11-06 14:27:29,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:29,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253078983] [2021-11-06 14:27:29,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:27:29,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:29,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:29,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:29,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 14:27:29,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:27:29,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:27:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-06 14:27:29,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253078983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:29,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:27:29,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-06 14:27:29,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088506705] [2021-11-06 14:27:29,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:27:29,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:27:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:27:29,768 INFO L87 Difference]: Start difference. First operand 349 states and 465 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:29,875 INFO L93 Difference]: Finished difference Result 1020 states and 1367 transitions. [2021-11-06 14:27:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:27:29,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-06 14:27:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:29,878 INFO L225 Difference]: With dead ends: 1020 [2021-11-06 14:27:29,878 INFO L226 Difference]: Without dead ends: 851 [2021-11-06 14:27:29,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:27:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-11-06 14:27:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 672. [2021-11-06 14:27:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.347242921013413) internal successors, (904), 671 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 904 transitions. [2021-11-06 14:27:29,915 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 904 transitions. Word has length 109 [2021-11-06 14:27:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:29,915 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 904 transitions. [2021-11-06 14:27:29,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 904 transitions. [2021-11-06 14:27:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-06 14:27:29,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:29,916 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 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] [2021-11-06 14:27:29,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:30,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 14:27:30,138 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2074744523, now seen corresponding path program 1 times [2021-11-06 14:27:30,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:30,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577702808] [2021-11-06 14:27:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:30,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-06 14:27:30,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:30,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577702808] [2021-11-06 14:27:30,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577702808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:30,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:27:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:27:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826746390] [2021-11-06 14:27:30,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:27:30,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:27:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:27:30,196 INFO L87 Difference]: Start difference. First operand 672 states and 904 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-11-06 14:27:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:30,288 INFO L93 Difference]: Finished difference Result 2015 states and 2717 transitions. [2021-11-06 14:27:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:27:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 111 [2021-11-06 14:27:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:30,293 INFO L225 Difference]: With dead ends: 2015 [2021-11-06 14:27:30,293 INFO L226 Difference]: Without dead ends: 1523 [2021-11-06 14:27:30,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:27:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-11-06 14:27:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 684. [2021-11-06 14:27:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.3484626647144948) internal successors, (921), 683 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 921 transitions. [2021-11-06 14:27:30,375 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 921 transitions. Word has length 111 [2021-11-06 14:27:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:30,375 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 921 transitions. [2021-11-06 14:27:30,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-11-06 14:27:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 921 transitions. [2021-11-06 14:27:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-06 14:27:30,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:30,377 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 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] [2021-11-06 14:27:30,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-06 14:27:30,377 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1970658578, now seen corresponding path program 1 times [2021-11-06 14:27:30,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:30,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653778351] [2021-11-06 14:27:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:30,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:30,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:30,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653778351] [2021-11-06 14:27:30,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653778351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:30,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041338900] [2021-11-06 14:27:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:30,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:30,451 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:30,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-06 14:27:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:27:30,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:30,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041338900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:30,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:30,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-06 14:27:30,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037623835] [2021-11-06 14:27:30,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:27:30,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:27:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:27:30,988 INFO L87 Difference]: Start difference. First operand 684 states and 921 transitions. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:31,070 INFO L93 Difference]: Finished difference Result 1372 states and 1852 transitions. [2021-11-06 14:27:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:27:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 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 113 [2021-11-06 14:27:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:31,073 INFO L225 Difference]: With dead ends: 1372 [2021-11-06 14:27:31,073 INFO L226 Difference]: Without dead ends: 712 [2021-11-06 14:27:31,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:27:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-06 14:27:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 700. [2021-11-06 14:27:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.34620886981402) internal successors, (941), 699 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 941 transitions. [2021-11-06 14:27:31,124 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 941 transitions. Word has length 113 [2021-11-06 14:27:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:31,124 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 941 transitions. [2021-11-06 14:27:31,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 941 transitions. [2021-11-06 14:27:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-06 14:27:31,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:31,125 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 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] [2021-11-06 14:27:31,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:31,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:31,339 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:31,340 INFO L85 PathProgramCache]: Analyzing trace with hash 940134923, now seen corresponding path program 2 times [2021-11-06 14:27:31,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:31,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11799369] [2021-11-06 14:27:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:31,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:31,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:31,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11799369] [2021-11-06 14:27:31,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11799369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:31,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684701326] [2021-11-06 14:27:31,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:27:31,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:31,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:31,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:31,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-06 14:27:31,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:27:31,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:31,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 14:27:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:32,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684701326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:32,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:32,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-06 14:27:32,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605416996] [2021-11-06 14:27:32,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 14:27:32,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:32,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 14:27:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:27:32,055 INFO L87 Difference]: Start difference. First operand 700 states and 941 transitions. Second operand has 12 states, 12 states have (on average 10.0) internal successors, (120), 12 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:32,144 INFO L93 Difference]: Finished difference Result 1404 states and 1892 transitions. [2021-11-06 14:27:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:27:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.0) internal successors, (120), 12 states have internal predecessors, (120), 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 117 [2021-11-06 14:27:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:32,146 INFO L225 Difference]: With dead ends: 1404 [2021-11-06 14:27:32,146 INFO L226 Difference]: Without dead ends: 728 [2021-11-06 14:27:32,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:27:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-06 14:27:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 716. [2021-11-06 14:27:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.344055944055944) internal successors, (961), 715 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 961 transitions. [2021-11-06 14:27:32,216 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 961 transitions. Word has length 117 [2021-11-06 14:27:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:32,216 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 961 transitions. [2021-11-06 14:27:32,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.0) internal successors, (120), 12 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 961 transitions. [2021-11-06 14:27:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-06 14:27:32,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:32,218 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 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] [2021-11-06 14:27:32,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:32,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-06 14:27:32,431 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash -378035580, now seen corresponding path program 3 times [2021-11-06 14:27:32,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:32,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766010323] [2021-11-06 14:27:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:32,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:32,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:32,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766010323] [2021-11-06 14:27:32,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766010323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:32,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186064630] [2021-11-06 14:27:32,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:27:32,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:32,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:32,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-06 14:27:32,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:27:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:27:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-06 14:27:33,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186064630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:27:33,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:27:33,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2021-11-06 14:27:33,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960326002] [2021-11-06 14:27:33,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:27:33,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:33,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:27:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:27:33,118 INFO L87 Difference]: Start difference. First operand 716 states and 961 transitions. Second operand has 3 states, 3 states have (on average 29.0) 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) [2021-11-06 14:27:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:33,181 INFO L93 Difference]: Finished difference Result 1818 states and 2451 transitions. [2021-11-06 14:27:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:27:33,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) 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 121 [2021-11-06 14:27:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:33,184 INFO L225 Difference]: With dead ends: 1818 [2021-11-06 14:27:33,184 INFO L226 Difference]: Without dead ends: 1126 [2021-11-06 14:27:33,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:27:33,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-11-06 14:27:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 704. [2021-11-06 14:27:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 1.332859174964438) internal successors, (937), 703 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 937 transitions. [2021-11-06 14:27:33,239 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 937 transitions. Word has length 121 [2021-11-06 14:27:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:33,239 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 937 transitions. [2021-11-06 14:27:33,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) 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) [2021-11-06 14:27:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 937 transitions. [2021-11-06 14:27:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-06 14:27:33,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:33,240 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 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] [2021-11-06 14:27:33,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:33,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-06 14:27:33,460 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:33,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash -332192124, now seen corresponding path program 1 times [2021-11-06 14:27:33,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:33,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384489005] [2021-11-06 14:27:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:33,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:33,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:33,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384489005] [2021-11-06 14:27:33,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384489005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:33,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590693077] [2021-11-06 14:27:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:33,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:33,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:33,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-06 14:27:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:27:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:34,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590693077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:34,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:34,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-06 14:27:34,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55644152] [2021-11-06 14:27:34,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 14:27:34,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:34,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 14:27:34,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:27:34,206 INFO L87 Difference]: Start difference. First operand 704 states and 937 transitions. Second operand has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:34,295 INFO L93 Difference]: Finished difference Result 1412 states and 1884 transitions. [2021-11-06 14:27:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 14:27:34,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 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 121 [2021-11-06 14:27:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:34,297 INFO L225 Difference]: With dead ends: 1412 [2021-11-06 14:27:34,298 INFO L226 Difference]: Without dead ends: 732 [2021-11-06 14:27:34,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:27:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-06 14:27:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 720. [2021-11-06 14:27:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.3310152990264257) internal successors, (957), 719 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 957 transitions. [2021-11-06 14:27:34,352 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 957 transitions. Word has length 121 [2021-11-06 14:27:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:34,352 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 957 transitions. [2021-11-06 14:27:34,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 957 transitions. [2021-11-06 14:27:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-06 14:27:34,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:34,353 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 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] [2021-11-06 14:27:34,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:34,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-06 14:27:34,563 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1532849539, now seen corresponding path program 2 times [2021-11-06 14:27:34,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:34,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360444307] [2021-11-06 14:27:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:34,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:34,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:34,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360444307] [2021-11-06 14:27:34,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360444307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:34,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764727237] [2021-11-06 14:27:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:27:34,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:34,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:34,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-06 14:27:35,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:27:35,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 14:27:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:35,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764727237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:35,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:35,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-06 14:27:35,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124675273] [2021-11-06 14:27:35,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 14:27:35,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 14:27:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:27:35,320 INFO L87 Difference]: Start difference. First operand 720 states and 957 transitions. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:35,412 INFO L93 Difference]: Finished difference Result 1444 states and 1924 transitions. [2021-11-06 14:27:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:27:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-06 14:27:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:35,414 INFO L225 Difference]: With dead ends: 1444 [2021-11-06 14:27:35,414 INFO L226 Difference]: Without dead ends: 748 [2021-11-06 14:27:35,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:27:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-06 14:27:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 736. [2021-11-06 14:27:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.3292517006802722) internal successors, (977), 735 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 977 transitions. [2021-11-06 14:27:35,484 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 977 transitions. Word has length 125 [2021-11-06 14:27:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:35,484 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 977 transitions. [2021-11-06 14:27:35,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 977 transitions. [2021-11-06 14:27:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-06 14:27:35,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:35,485 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 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] [2021-11-06 14:27:35,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:35,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:35,686 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2132367862, now seen corresponding path program 3 times [2021-11-06 14:27:35,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:35,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539862195] [2021-11-06 14:27:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:35,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 7 proven. 231 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:27:35,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539862195] [2021-11-06 14:27:35,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539862195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872520277] [2021-11-06 14:27:35,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:27:35,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:35,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:35,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-06 14:27:36,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:27:36,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 14:27:36,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-06 14:27:36,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872520277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:36,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:36,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2021-11-06 14:27:36,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783282410] [2021-11-06 14:27:36,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 14:27:36,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 14:27:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:27:36,589 INFO L87 Difference]: Start difference. First operand 736 states and 977 transitions. Second operand has 17 states, 17 states have (on average 10.411764705882353) internal successors, (177), 17 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:36,986 INFO L93 Difference]: Finished difference Result 1962 states and 2631 transitions. [2021-11-06 14:27:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-06 14:27:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.411764705882353) internal successors, (177), 17 states have internal predecessors, (177), 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 129 [2021-11-06 14:27:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:36,990 INFO L225 Difference]: With dead ends: 1962 [2021-11-06 14:27:36,990 INFO L226 Difference]: Without dead ends: 1250 [2021-11-06 14:27:36,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-11-06 14:27:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-06 14:27:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 756. [2021-11-06 14:27:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 1.3258278145695364) internal successors, (1001), 755 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1001 transitions. [2021-11-06 14:27:37,064 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1001 transitions. Word has length 129 [2021-11-06 14:27:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:37,064 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1001 transitions. [2021-11-06 14:27:37,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.411764705882353) internal successors, (177), 17 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1001 transitions. [2021-11-06 14:27:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-06 14:27:37,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:37,066 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 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] [2021-11-06 14:27:37,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:37,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:37,283 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash 276540086, now seen corresponding path program 1 times [2021-11-06 14:27:37,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:37,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739915721] [2021-11-06 14:27:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:37,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:27:37,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:37,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739915721] [2021-11-06 14:27:37,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739915721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:37,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673036878] [2021-11-06 14:27:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:37,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:37,451 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:37,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-06 14:27:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:38,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 14:27:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:27:38,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673036878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:38,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:38,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-06 14:27:38,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060673635] [2021-11-06 14:27:38,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 14:27:38,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:38,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 14:27:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:27:38,260 INFO L87 Difference]: Start difference. First operand 756 states and 1001 transitions. Second operand has 16 states, 16 states have (on average 8.5625) internal successors, (137), 16 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:38,372 INFO L93 Difference]: Finished difference Result 1516 states and 2012 transitions. [2021-11-06 14:27:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 14:27:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 16 states have internal predecessors, (137), 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 134 [2021-11-06 14:27:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:38,375 INFO L225 Difference]: With dead ends: 1516 [2021-11-06 14:27:38,375 INFO L226 Difference]: Without dead ends: 784 [2021-11-06 14:27:38,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:27:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-06 14:27:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 772. [2021-11-06 14:27:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.324254215304799) internal successors, (1021), 771 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1021 transitions. [2021-11-06 14:27:38,436 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1021 transitions. Word has length 134 [2021-11-06 14:27:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:38,436 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 1021 transitions. [2021-11-06 14:27:38,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 16 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1021 transitions. [2021-11-06 14:27:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-06 14:27:38,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:38,438 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 3, 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] [2021-11-06 14:27:38,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:38,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-06 14:27:38,655 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash 678116189, now seen corresponding path program 2 times [2021-11-06 14:27:38,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:38,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793394073] [2021-11-06 14:27:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:38,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 7 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:27:38,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:38,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793394073] [2021-11-06 14:27:38,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793394073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:38,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340409168] [2021-11-06 14:27:38,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:27:38,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:38,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:38,817 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:38,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-06 14:27:39,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:27:39,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 14:27:39,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 7 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:27:39,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340409168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:39,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:39,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-06 14:27:39,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928737331] [2021-11-06 14:27:39,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 14:27:39,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 14:27:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:27:39,584 INFO L87 Difference]: Start difference. First operand 772 states and 1021 transitions. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:39,685 INFO L93 Difference]: Finished difference Result 1548 states and 2052 transitions. [2021-11-06 14:27:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 14:27:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 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 138 [2021-11-06 14:27:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:39,688 INFO L225 Difference]: With dead ends: 1548 [2021-11-06 14:27:39,688 INFO L226 Difference]: Without dead ends: 800 [2021-11-06 14:27:39,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:27:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-06 14:27:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 788. [2021-11-06 14:27:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 1.3227445997458704) internal successors, (1041), 787 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1041 transitions. [2021-11-06 14:27:39,752 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1041 transitions. Word has length 138 [2021-11-06 14:27:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:39,753 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1041 transitions. [2021-11-06 14:27:39,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1041 transitions. [2021-11-06 14:27:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-06 14:27:39,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:39,754 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 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] [2021-11-06 14:27:39,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:39,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-06 14:27:39,959 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1488707452, now seen corresponding path program 3 times [2021-11-06 14:27:39,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:39,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096955818] [2021-11-06 14:27:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:39,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:27:40,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:40,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096955818] [2021-11-06 14:27:40,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096955818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:40,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538446550] [2021-11-06 14:27:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:27:40,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:40,122 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:40,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-06 14:27:40,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:27:40,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:40,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 14:27:40,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-11-06 14:27:40,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538446550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:40,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:40,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-11-06 14:27:40,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152968678] [2021-11-06 14:27:40,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-06 14:27:40,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-06 14:27:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:27:40,953 INFO L87 Difference]: Start difference. First operand 788 states and 1041 transitions. Second operand has 22 states, 22 states have (on average 8.772727272727273) internal successors, (193), 22 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:41,872 INFO L93 Difference]: Finished difference Result 2323 states and 3091 transitions. [2021-11-06 14:27:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-06 14:27:41,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.772727272727273) internal successors, (193), 22 states have internal predecessors, (193), 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 142 [2021-11-06 14:27:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:41,878 INFO L225 Difference]: With dead ends: 2323 [2021-11-06 14:27:41,878 INFO L226 Difference]: Without dead ends: 1544 [2021-11-06 14:27:41,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=3524, Unknown=0, NotChecked=0, Total=4970 [2021-11-06 14:27:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-11-06 14:27:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 808. [2021-11-06 14:27:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.318463444857497) internal successors, (1064), 807 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1064 transitions. [2021-11-06 14:27:41,940 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1064 transitions. Word has length 142 [2021-11-06 14:27:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:41,940 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 1064 transitions. [2021-11-06 14:27:41,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.772727272727273) internal successors, (193), 22 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1064 transitions. [2021-11-06 14:27:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-06 14:27:41,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:41,945 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 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] [2021-11-06 14:27:41,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:42,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-06 14:27:42,163 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 585320124, now seen corresponding path program 1 times [2021-11-06 14:27:42,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:42,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092164839] [2021-11-06 14:27:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:42,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 7 proven. 435 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 14:27:42,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:42,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092164839] [2021-11-06 14:27:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092164839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:42,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116908982] [2021-11-06 14:27:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:42,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:42,350 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:42,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-06 14:27:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 14:27:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 7 proven. 435 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 14:27:43,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116908982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:43,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:43,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-06 14:27:43,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626834147] [2021-11-06 14:27:43,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-06 14:27:43,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-06 14:27:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:27:43,187 INFO L87 Difference]: Start difference. First operand 808 states and 1064 transitions. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:43,325 INFO L93 Difference]: Finished difference Result 1620 states and 2139 transitions. [2021-11-06 14:27:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-06 14:27:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 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 147 [2021-11-06 14:27:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:43,328 INFO L225 Difference]: With dead ends: 1620 [2021-11-06 14:27:43,328 INFO L226 Difference]: Without dead ends: 836 [2021-11-06 14:27:43,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:27:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-11-06 14:27:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 824. [2021-11-06 14:27:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.3171324422843256) internal successors, (1084), 823 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1084 transitions. [2021-11-06 14:27:43,386 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1084 transitions. Word has length 147 [2021-11-06 14:27:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:43,386 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1084 transitions. [2021-11-06 14:27:43,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1084 transitions. [2021-11-06 14:27:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-06 14:27:43,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:43,387 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 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] [2021-11-06 14:27:43,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:43,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-06 14:27:43,608 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1066648203, now seen corresponding path program 2 times [2021-11-06 14:27:43,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:43,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044887227] [2021-11-06 14:27:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:43,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 14:27:43,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:43,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044887227] [2021-11-06 14:27:43,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044887227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:43,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165197164] [2021-11-06 14:27:43,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:27:43,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:43,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:43,793 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:43,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-06 14:27:44,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:27:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:44,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 14:27:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 14:27:44,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165197164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:44,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:44,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-06 14:27:44,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283653079] [2021-11-06 14:27:44,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-06 14:27:44,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-06 14:27:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:27:44,673 INFO L87 Difference]: Start difference. First operand 824 states and 1084 transitions. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:44,788 INFO L93 Difference]: Finished difference Result 1652 states and 2179 transitions. [2021-11-06 14:27:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 14:27:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 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 151 [2021-11-06 14:27:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:44,791 INFO L225 Difference]: With dead ends: 1652 [2021-11-06 14:27:44,791 INFO L226 Difference]: Without dead ends: 852 [2021-11-06 14:27:44,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:27:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-06 14:27:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 840. [2021-11-06 14:27:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.3158522050059596) internal successors, (1104), 839 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1104 transitions. [2021-11-06 14:27:44,851 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1104 transitions. Word has length 151 [2021-11-06 14:27:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:44,851 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1104 transitions. [2021-11-06 14:27:44,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1104 transitions. [2021-11-06 14:27:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-06 14:27:44,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:44,852 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 3, 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] [2021-11-06 14:27:44,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:45,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:45,055 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash -289853522, now seen corresponding path program 3 times [2021-11-06 14:27:45,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:45,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073365399] [2021-11-06 14:27:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:45,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 7 proven. 561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 14:27:45,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:45,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073365399] [2021-11-06 14:27:45,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073365399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:45,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992172728] [2021-11-06 14:27:45,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:27:45,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:45,262 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:45,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-06 14:27:46,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:27:46,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 14:27:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-11-06 14:27:46,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992172728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:46,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:46,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2021-11-06 14:27:46,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725410800] [2021-11-06 14:27:46,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-06 14:27:46,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-06 14:27:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-11-06 14:27:46,746 INFO L87 Difference]: Start difference. First operand 840 states and 1104 transitions. Second operand has 24 states, 24 states have (on average 8.5) internal successors, (204), 24 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:47,610 INFO L93 Difference]: Finished difference Result 2472 states and 3273 transitions. [2021-11-06 14:27:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-06 14:27:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.5) internal successors, (204), 24 states have internal predecessors, (204), 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 155 [2021-11-06 14:27:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:47,615 INFO L225 Difference]: With dead ends: 2472 [2021-11-06 14:27:47,615 INFO L226 Difference]: Without dead ends: 1656 [2021-11-06 14:27:47,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1179, Invalid=2727, Unknown=0, NotChecked=0, Total=3906 [2021-11-06 14:27:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-11-06 14:27:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 860. [2021-11-06 14:27:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 1.3131548311990686) internal successors, (1128), 859 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1128 transitions. [2021-11-06 14:27:47,691 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1128 transitions. Word has length 155 [2021-11-06 14:27:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:47,691 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1128 transitions. [2021-11-06 14:27:47,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.5) internal successors, (204), 24 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1128 transitions. [2021-11-06 14:27:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-06 14:27:47,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:47,692 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:27:47,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:47,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:47,899 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash -254579968, now seen corresponding path program 4 times [2021-11-06 14:27:47,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:47,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981437947] [2021-11-06 14:27:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:47,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:27:48,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:48,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981437947] [2021-11-06 14:27:48,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981437947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:48,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424360567] [2021-11-06 14:27:48,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:27:48,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:48,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:48,117 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:48,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-06 14:27:48,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:27:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:27:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 14:27:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:27:49,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424360567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:49,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:49,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-06 14:27:49,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556698857] [2021-11-06 14:27:49,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-06 14:27:49,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:49,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-06 14:27:49,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:27:49,068 INFO L87 Difference]: Start difference. First operand 860 states and 1128 transitions. Second operand has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:49,234 INFO L93 Difference]: Finished difference Result 1724 states and 2267 transitions. [2021-11-06 14:27:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-06 14:27:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 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 160 [2021-11-06 14:27:49,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:49,237 INFO L225 Difference]: With dead ends: 1724 [2021-11-06 14:27:49,237 INFO L226 Difference]: Without dead ends: 888 [2021-11-06 14:27:49,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:27:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-11-06 14:27:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 876. [2021-11-06 14:27:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.312) internal successors, (1148), 875 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1148 transitions. [2021-11-06 14:27:49,308 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1148 transitions. Word has length 160 [2021-11-06 14:27:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:49,308 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1148 transitions. [2021-11-06 14:27:49,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:27:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1148 transitions. [2021-11-06 14:27:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-06 14:27:49,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:49,310 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:27:49,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:49,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:49,523 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:27:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash -380573465, now seen corresponding path program 5 times [2021-11-06 14:27:49,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:49,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721207156] [2021-11-06 14:27:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:49,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 7 proven. 703 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:27:49,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:49,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721207156] [2021-11-06 14:27:49,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721207156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:49,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146196246] [2021-11-06 14:27:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:27:49,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:49,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:49,743 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:49,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-06 14:30:41,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-06 14:30:41,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:30:41,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-06 14:30:41,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 7 proven. 703 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:30:42,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146196246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:42,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:30:42,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-06 14:30:42,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908858298] [2021-11-06 14:30:42,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-06 14:30:42,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:42,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-06 14:30:42,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-06 14:30:42,121 INFO L87 Difference]: Start difference. First operand 876 states and 1148 transitions. Second operand has 23 states, 23 states have (on average 7.217391304347826) internal successors, (166), 23 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:42,280 INFO L93 Difference]: Finished difference Result 1756 states and 2307 transitions. [2021-11-06 14:30:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-06 14:30:42,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.217391304347826) internal successors, (166), 23 states have internal predecessors, (166), 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 164 [2021-11-06 14:30:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:42,283 INFO L225 Difference]: With dead ends: 1756 [2021-11-06 14:30:42,284 INFO L226 Difference]: Without dead ends: 904 [2021-11-06 14:30:42,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-06 14:30:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-11-06 14:30:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 892. [2021-11-06 14:30:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.3108866442199776) internal successors, (1168), 891 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1168 transitions. [2021-11-06 14:30:42,354 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1168 transitions. Word has length 164 [2021-11-06 14:30:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:42,354 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1168 transitions. [2021-11-06 14:30:42,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.217391304347826) internal successors, (166), 23 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1168 transitions. [2021-11-06 14:30:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:30:42,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:42,355 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:42,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-06 14:30:42,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:42,575 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1233066830, now seen corresponding path program 6 times [2021-11-06 14:30:42,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:42,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443218007] [2021-11-06 14:30:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:42,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 7 proven. 780 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:30:42,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:42,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443218007] [2021-11-06 14:30:42,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443218007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:42,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353190039] [2021-11-06 14:30:42,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 14:30:42,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:42,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:42,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:30:42,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-06 14:30:44,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-06 14:30:44,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:30:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:30:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-06 14:30:45,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353190039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:45,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:30:45,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5] total 26 [2021-11-06 14:30:45,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817895544] [2021-11-06 14:30:45,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-06 14:30:45,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:45,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-06 14:30:45,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2021-11-06 14:30:45,028 INFO L87 Difference]: Start difference. First operand 892 states and 1168 transitions. Second operand has 26 states, 26 states have (on average 8.23076923076923) internal successors, (214), 26 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:45,671 INFO L93 Difference]: Finished difference Result 2418 states and 3194 transitions. [2021-11-06 14:30:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-06 14:30:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.23076923076923) internal successors, (214), 26 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-06 14:30:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:45,675 INFO L225 Difference]: With dead ends: 2418 [2021-11-06 14:30:45,675 INFO L226 Difference]: Without dead ends: 1550 [2021-11-06 14:30:45,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=771, Invalid=1581, Unknown=0, NotChecked=0, Total=2352 [2021-11-06 14:30:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-11-06 14:30:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 912. [2021-11-06 14:30:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 1.3084522502744238) internal successors, (1192), 911 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1192 transitions. [2021-11-06 14:30:45,750 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1192 transitions. Word has length 168 [2021-11-06 14:30:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:45,751 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1192 transitions. [2021-11-06 14:30:45,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.23076923076923) internal successors, (214), 26 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1192 transitions. [2021-11-06 14:30:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-06 14:30:45,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:45,763 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 3, 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] [2021-11-06 14:30:45,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-06 14:30:45,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:45,964 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1617447248, now seen corresponding path program 7 times [2021-11-06 14:30:45,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:45,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484945173] [2021-11-06 14:30:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:45,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 7 proven. 861 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:30:46,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:46,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484945173] [2021-11-06 14:30:46,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484945173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:46,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337243051] [2021-11-06 14:30:46,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-06 14:30:46,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:46,225 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:30:46,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-06 14:30:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:47,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-06 14:30:47,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 7 proven. 861 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:30:47,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337243051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:47,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:30:47,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-06 14:30:47,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371692863] [2021-11-06 14:30:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-06 14:30:47,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-06 14:30:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-06 14:30:47,282 INFO L87 Difference]: Start difference. First operand 912 states and 1192 transitions. Second operand has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:47,431 INFO L93 Difference]: Finished difference Result 1828 states and 2395 transitions. [2021-11-06 14:30:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-06 14:30:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-06 14:30:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:47,434 INFO L225 Difference]: With dead ends: 1828 [2021-11-06 14:30:47,434 INFO L226 Difference]: Without dead ends: 940 [2021-11-06 14:30:47,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-06 14:30:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-11-06 14:30:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 928. [2021-11-06 14:30:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.307443365695793) internal successors, (1212), 927 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1212 transitions. [2021-11-06 14:30:47,538 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1212 transitions. Word has length 173 [2021-11-06 14:30:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:47,539 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1212 transitions. [2021-11-06 14:30:47,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1212 transitions. [2021-11-06 14:30:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-06 14:30:47,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:47,540 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 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] [2021-11-06 14:30:47,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-06 14:30:47,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-06 14:30:47,760 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash 885934121, now seen corresponding path program 8 times [2021-11-06 14:30:47,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:47,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126044520] [2021-11-06 14:30:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:47,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:30:48,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:48,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126044520] [2021-11-06 14:30:48,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126044520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:48,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894264725] [2021-11-06 14:30:48,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:30:48,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:48,023 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:30:48,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-06 14:30:48,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:30:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:30:48,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-06 14:30:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:30:49,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894264725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:49,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:30:49,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-06 14:30:49,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574093532] [2021-11-06 14:30:49,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-06 14:30:49,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-06 14:30:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-06 14:30:49,192 INFO L87 Difference]: Start difference. First operand 928 states and 1212 transitions. Second operand has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:49,366 INFO L93 Difference]: Finished difference Result 1860 states and 2435 transitions. [2021-11-06 14:30:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-06 14:30:49,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 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 177 [2021-11-06 14:30:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:49,369 INFO L225 Difference]: With dead ends: 1860 [2021-11-06 14:30:49,369 INFO L226 Difference]: Without dead ends: 956 [2021-11-06 14:30:49,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-06 14:30:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-11-06 14:30:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 944. [2021-11-06 14:30:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.3064687168610816) internal successors, (1232), 943 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1232 transitions. [2021-11-06 14:30:49,455 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1232 transitions. Word has length 177 [2021-11-06 14:30:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:49,455 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1232 transitions. [2021-11-06 14:30:49,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1232 transitions. [2021-11-06 14:30:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-06 14:30:49,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:49,456 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 3, 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] [2021-11-06 14:30:49,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-06 14:30:49,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-06 14:30:49,665 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1090352418, now seen corresponding path program 9 times [2021-11-06 14:30:49,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:49,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366960763] [2021-11-06 14:30:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:49,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 7 proven. 1035 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:30:49,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:49,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366960763] [2021-11-06 14:30:49,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366960763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:49,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363691740] [2021-11-06 14:30:49,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:30:49,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:49,960 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:30:49,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-06 14:30:51,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:30:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:30:51,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 14:30:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1040 trivial. 0 not checked. [2021-11-06 14:30:51,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363691740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:51,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:30:51,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 7] total 31 [2021-11-06 14:30:51,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753540874] [2021-11-06 14:30:51,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-06 14:30:51,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-06 14:30:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=595, Unknown=0, NotChecked=0, Total=930 [2021-11-06 14:30:51,524 INFO L87 Difference]: Start difference. First operand 944 states and 1232 transitions. Second operand has 31 states, 31 states have (on average 7.387096774193548) internal successors, (229), 31 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:51,900 INFO L93 Difference]: Finished difference Result 1904 states and 2491 transitions. [2021-11-06 14:30:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-06 14:30:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.387096774193548) internal successors, (229), 31 states have internal predecessors, (229), 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 181 [2021-11-06 14:30:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:51,906 INFO L225 Difference]: With dead ends: 1904 [2021-11-06 14:30:51,907 INFO L226 Difference]: Without dead ends: 976 [2021-11-06 14:30:51,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-11-06 14:30:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-11-06 14:30:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 964. [2021-11-06 14:30:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 1.304257528556594) internal successors, (1256), 963 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1256 transitions. [2021-11-06 14:30:51,988 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1256 transitions. Word has length 181 [2021-11-06 14:30:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:51,988 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1256 transitions. [2021-11-06 14:30:51,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.387096774193548) internal successors, (229), 31 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1256 transitions. [2021-11-06 14:30:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-06 14:30:51,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:51,990 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:52,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-06 14:30:52,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-06 14:30:52,191 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:52,191 INFO L85 PathProgramCache]: Analyzing trace with hash 9660426, now seen corresponding path program 10 times [2021-11-06 14:30:52,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:52,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184406117] [2021-11-06 14:30:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:52,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 7 proven. 1128 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 14:30:52,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:52,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184406117] [2021-11-06 14:30:52,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184406117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:52,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72711093] [2021-11-06 14:30:52,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:30:52,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:52,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:52,495 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:30:52,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-06 14:30:53,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:30:53,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:30:53,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-06 14:30:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 7 proven. 1128 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 14:30:53,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72711093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:53,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:30:53,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-06 14:30:53,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723494625] [2021-11-06 14:30:53,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-06 14:30:53,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-06 14:30:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-06 14:30:53,836 INFO L87 Difference]: Start difference. First operand 964 states and 1256 transitions. Second operand has 28 states, 28 states have (on average 6.642857142857143) internal successors, (186), 28 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:54,012 INFO L93 Difference]: Finished difference Result 1932 states and 2523 transitions. [2021-11-06 14:30:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-06 14:30:54,013 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.642857142857143) internal successors, (186), 28 states have internal predecessors, (186), 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 186 [2021-11-06 14:30:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:54,015 INFO L225 Difference]: With dead ends: 1932 [2021-11-06 14:30:54,015 INFO L226 Difference]: Without dead ends: 992 [2021-11-06 14:30:54,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-06 14:30:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-11-06 14:30:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 980. [2021-11-06 14:30:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 1.303370786516854) internal successors, (1276), 979 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1276 transitions. [2021-11-06 14:30:54,111 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1276 transitions. Word has length 186 [2021-11-06 14:30:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:54,111 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1276 transitions. [2021-11-06 14:30:54,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.642857142857143) internal successors, (186), 28 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1276 transitions. [2021-11-06 14:30:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-06 14:30:54,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:54,113 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:54,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-06 14:30:54,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:54,320 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1948566321, now seen corresponding path program 11 times [2021-11-06 14:30:54,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:54,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687615535] [2021-11-06 14:30:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:54,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 7 proven. 1225 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 14:30:54,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:54,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687615535] [2021-11-06 14:30:54,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687615535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:54,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200094246] [2021-11-06 14:30:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:30:54,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:54,625 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:30:54,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process Killed by 15