./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/nla-digbench-scaling/egcd3-ll_unwindbound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 12:10:50,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 12:10:50,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 12:10:50,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 12:10:50,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 12:10:50,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 12:10:50,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 12:10:50,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 12:10:50,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 12:10:50,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 12:10:50,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 12:10:50,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 12:10:50,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 12:10:50,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 12:10:50,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 12:10:50,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 12:10:50,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 12:10:50,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 12:10:50,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 12:10:50,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 12:10:50,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 12:10:50,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 12:10:50,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 12:10:50,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 12:10:50,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 12:10:50,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 12:10:50,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 12:10:50,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 12:10:50,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 12:10:50,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 12:10:50,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 12:10:50,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 12:10:50,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 12:10:50,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 12:10:50,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 12:10:50,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 12:10:50,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 12:10:50,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 12:10:50,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 12:10:50,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 12:10:50,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 12:10:50,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 12:10:50,856 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 12:10:50,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 12:10:50,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 12:10:50,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 12:10:50,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 12:10:50,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 12:10:50,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 12:10:50,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 12:10:50,858 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 12:10:50,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 12:10:50,859 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 12:10:50,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 12:10:50,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 12:10:50,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 12:10:50,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 12:10:50,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 12:10:50,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 12:10:50,860 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 12:10:50,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 12:10:50,861 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 12:10:50,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 12:10:50,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 12:10:50,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 12:10:50,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 12:10:50,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:10:50,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 12:10:50,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 12:10:50,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 12:10:50,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 12:10:50,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 12:10:50,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 12:10:50,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 12:10:50,878 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 12:10:50,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 12:10:50,879 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 12:10:50,879 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2023-02-14 12:10:51,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 12:10:51,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 12:10:51,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 12:10:51,253 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 12:10:51,253 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 12:10:51,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2023-02-14 12:10:52,501 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 12:10:52,641 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 12:10:52,642 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2023-02-14 12:10:52,646 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f7e6b467/3e72ae55526f412596cf71e836903f10/FLAGfe875eda9 [2023-02-14 12:10:52,656 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f7e6b467/3e72ae55526f412596cf71e836903f10 [2023-02-14 12:10:52,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 12:10:52,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 12:10:52,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 12:10:52,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 12:10:52,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 12:10:52,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e4452d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52, skipping insertion in model container [2023-02-14 12:10:52,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 12:10:52,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 12:10:52,765 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2023-02-14 12:10:52,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:10:52,784 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 12:10:52,792 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2023-02-14 12:10:52,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:10:52,806 INFO L208 MainTranslator]: Completed translation [2023-02-14 12:10:52,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52 WrapperNode [2023-02-14 12:10:52,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 12:10:52,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 12:10:52,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 12:10:52,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 12:10:52,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,827 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2023-02-14 12:10:52,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 12:10:52,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 12:10:52,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 12:10:52,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 12:10:52,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,839 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 12:10:52,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 12:10:52,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 12:10:52,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 12:10:52,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (1/1) ... [2023-02-14 12:10:52,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:10:52,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:52,863 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) [2023-02-14 12:10:52,875 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 [2023-02-14 12:10:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 12:10:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 12:10:52,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 12:10:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 12:10:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 12:10:52,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 12:10:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 12:10:52,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 12:10:52,932 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 12:10:52,933 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 12:10:53,041 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 12:10:53,045 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 12:10:53,045 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 12:10:53,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:10:53 BoogieIcfgContainer [2023-02-14 12:10:53,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 12:10:53,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 12:10:53,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 12:10:53,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 12:10:53,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:10:52" (1/3) ... [2023-02-14 12:10:53,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53702ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:10:53, skipping insertion in model container [2023-02-14 12:10:53,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:10:52" (2/3) ... [2023-02-14 12:10:53,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53702ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:10:53, skipping insertion in model container [2023-02-14 12:10:53,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:10:53" (3/3) ... [2023-02-14 12:10:53,052 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2023-02-14 12:10:53,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 12:10:53,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 12:10:53,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 12:10:53,098 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b81595d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 12:10:53,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 12:10:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 12:10:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 12:10:53,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:53,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:53,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:53,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2023-02-14 12:10:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:53,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678116624] [2023-02-14 12:10:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:53,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678116624] [2023-02-14 12:10:53,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 12:10:53,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711311828] [2023-02-14 12:10:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:53,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:53,242 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) [2023-02-14 12:10:53,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 12:10:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:53,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 12:10:53,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 12:10:53,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:10:53,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711311828] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:10:53,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:10:53,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 12:10:53,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748648244] [2023-02-14 12:10:53,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:10:53,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 12:10:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:53,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 12:10:53,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:10:53,395 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 12:10:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:53,422 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2023-02-14 12:10:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 12:10:53,424 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 12:10:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:53,428 INFO L225 Difference]: With dead ends: 67 [2023-02-14 12:10:53,428 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 12:10:53,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:10:53,437 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:53,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:10:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 12:10:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-14 12:10:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 12:10:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-02-14 12:10:53,474 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2023-02-14 12:10:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:53,474 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-02-14 12:10:53,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 12:10:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-02-14 12:10:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 12:10:53,476 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:53,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:53,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 12:10:53,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 12:10:53,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2023-02-14 12:10:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:53,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328716038] [2023-02-14 12:10:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:53,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:53,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925781306] [2023-02-14 12:10:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:53,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:53,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:53,717 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) [2023-02-14 12:10:53,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 12:10:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 12:10:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:53,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:10:53,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:53,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328716038] [2023-02-14 12:10:53,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925781306] [2023-02-14 12:10:53,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925781306] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:10:53,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:10:53,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 12:10:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501278506] [2023-02-14 12:10:53,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:10:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 12:10:53,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 12:10:53,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 12:10:53,854 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:53,873 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-02-14 12:10:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 12:10:53,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-14 12:10:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:53,874 INFO L225 Difference]: With dead ends: 40 [2023-02-14 12:10:53,874 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 12:10:53,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 12:10:53,875 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:53,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:10:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 12:10:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-14 12:10:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 12:10:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-14 12:10:53,887 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-02-14 12:10:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:53,888 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-14 12:10:53,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-14 12:10:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 12:10:53,889 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:53,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:53,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 12:10:54,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 12:10:54,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:54,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2023-02-14 12:10:54,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:54,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366954166] [2023-02-14 12:10:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:54,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:54,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:54,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682356245] [2023-02-14 12:10:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:54,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:54,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:54,127 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) [2023-02-14 12:10:54,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 12:10:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 12:10:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 12:10:54,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:10:54,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:54,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366954166] [2023-02-14 12:10:54,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:54,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682356245] [2023-02-14 12:10:54,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682356245] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:10:54,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:10:54,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 12:10:54,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038837039] [2023-02-14 12:10:54,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:10:54,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 12:10:54,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 12:10:54,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 12:10:54,241 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:54,323 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-02-14 12:10:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:10:54,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-14 12:10:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:54,325 INFO L225 Difference]: With dead ends: 53 [2023-02-14 12:10:54,325 INFO L226 Difference]: Without dead ends: 46 [2023-02-14 12:10:54,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 12:10:54,326 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:54,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:10:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-14 12:10:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-02-14 12:10:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 12:10:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-02-14 12:10:54,332 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2023-02-14 12:10:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:54,332 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-02-14 12:10:54,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-02-14 12:10:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 12:10:54,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:54,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:54,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 12:10:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:54,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2023-02-14 12:10:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:54,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175173118] [2023-02-14 12:10:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:54,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:54,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094804086] [2023-02-14 12:10:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:54,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:54,551 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) [2023-02-14 12:10:54,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 12:10:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:54,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 12:10:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:54,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:10:54,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175173118] [2023-02-14 12:10:54,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094804086] [2023-02-14 12:10:54,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094804086] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:10:54,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:10:54,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 12:10:54,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130312512] [2023-02-14 12:10:54,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:10:54,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 12:10:54,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 12:10:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 12:10:54,651 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:54,670 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-02-14 12:10:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 12:10:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-14 12:10:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:54,675 INFO L225 Difference]: With dead ends: 58 [2023-02-14 12:10:54,675 INFO L226 Difference]: Without dead ends: 36 [2023-02-14 12:10:54,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 12:10:54,679 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:54,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:10:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-14 12:10:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-14 12:10:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 12:10:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-02-14 12:10:54,690 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2023-02-14 12:10:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:54,694 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-02-14 12:10:54,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-02-14 12:10:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 12:10:54,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:54,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:54,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 12:10:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:54,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2023-02-14 12:10:54,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:54,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344758449] [2023-02-14 12:10:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:54,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:54,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022752702] [2023-02-14 12:10:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:54,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:54,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:54,930 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) [2023-02-14 12:10:54,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 12:10:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:54,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 12:10:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 12:10:55,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:10:55,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:55,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344758449] [2023-02-14 12:10:55,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:55,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022752702] [2023-02-14 12:10:55,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022752702] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:10:55,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:10:55,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 12:10:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143964486] [2023-02-14 12:10:55,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:10:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 12:10:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 12:10:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 12:10:55,085 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:55,165 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-02-14 12:10:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 12:10:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-14 12:10:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:55,166 INFO L225 Difference]: With dead ends: 54 [2023-02-14 12:10:55,166 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 12:10:55,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-14 12:10:55,167 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:55,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:10:55,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 12:10:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-14 12:10:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 12:10:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-02-14 12:10:55,173 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2023-02-14 12:10:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:55,174 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-02-14 12:10:55,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-02-14 12:10:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 12:10:55,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:55,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:55,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 12:10:55,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:55,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2023-02-14 12:10:55,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022979145] [2023-02-14 12:10:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:55,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:55,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076905676] [2023-02-14 12:10:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:55,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:55,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:55,400 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) [2023-02-14 12:10:55,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 12:10:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 12:10:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:55,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:10:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:55,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:55,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022979145] [2023-02-14 12:10:55,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:55,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076905676] [2023-02-14 12:10:55,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076905676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:10:55,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:10:55,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-14 12:10:55,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890648824] [2023-02-14 12:10:55,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:10:55,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 12:10:55,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:55,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 12:10:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-14 12:10:55,534 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:10:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:55,623 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2023-02-14 12:10:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 12:10:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-02-14 12:10:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:55,625 INFO L225 Difference]: With dead ends: 147 [2023-02-14 12:10:55,625 INFO L226 Difference]: Without dead ends: 140 [2023-02-14 12:10:55,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-14 12:10:55,626 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:55,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:10:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-14 12:10:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2023-02-14 12:10:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-14 12:10:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-14 12:10:55,642 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2023-02-14 12:10:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:55,642 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-14 12:10:55,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:10:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-14 12:10:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 12:10:55,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:55,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:55,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 12:10:55,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:55,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2023-02-14 12:10:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:55,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878510046] [2023-02-14 12:10:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:55,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:55,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:55,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556877015] [2023-02-14 12:10:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:55,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:55,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:55,863 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) [2023-02-14 12:10:55,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 12:10:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 12:10:55,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 12:10:55,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:10:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 12:10:55,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:55,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878510046] [2023-02-14 12:10:55,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:55,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556877015] [2023-02-14 12:10:55,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556877015] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:10:55,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:10:55,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-14 12:10:55,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534773694] [2023-02-14 12:10:55,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:10:55,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 12:10:55,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:55,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 12:10:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 12:10:55,988 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 12:10:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:56,147 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2023-02-14 12:10:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 12:10:56,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-14 12:10:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:56,165 INFO L225 Difference]: With dead ends: 183 [2023-02-14 12:10:56,165 INFO L226 Difference]: Without dead ends: 171 [2023-02-14 12:10:56,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-14 12:10:56,166 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:56,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:10:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-14 12:10:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2023-02-14 12:10:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-14 12:10:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2023-02-14 12:10:56,180 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2023-02-14 12:10:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:56,180 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2023-02-14 12:10:56,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 12:10:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2023-02-14 12:10:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 12:10:56,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:56,181 INFO L195 NwaCegarLoop]: 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] [2023-02-14 12:10:56,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 12:10:56,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:56,386 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:56,387 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2023-02-14 12:10:56,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:56,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96285146] [2023-02-14 12:10:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:56,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:56,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:56,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988239234] [2023-02-14 12:10:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:56,409 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) [2023-02-14 12:10:56,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 12:10:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 12:10:56,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:56,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:10:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96285146] [2023-02-14 12:10:56,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988239234] [2023-02-14 12:10:56,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988239234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 12:10:56,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 12:10:56,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-14 12:10:56,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994570442] [2023-02-14 12:10:56,606 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 12:10:56,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 12:10:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 12:10:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 12:10:56,608 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 12:10:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:56,689 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2023-02-14 12:10:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 12:10:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-14 12:10:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:56,690 INFO L225 Difference]: With dead ends: 143 [2023-02-14 12:10:56,691 INFO L226 Difference]: Without dead ends: 141 [2023-02-14 12:10:56,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-14 12:10:56,691 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:56,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:10:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-14 12:10:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-02-14 12:10:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-14 12:10:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2023-02-14 12:10:56,704 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2023-02-14 12:10:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:56,704 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2023-02-14 12:10:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 12:10:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2023-02-14 12:10:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 12:10:56,705 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:56,705 INFO L195 NwaCegarLoop]: 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] [2023-02-14 12:10:56,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 12:10:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-14 12:10:56,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2023-02-14 12:10:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:56,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977500154] [2023-02-14 12:10:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:56,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:56,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720488030] [2023-02-14 12:10:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:56,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:56,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:56,919 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) [2023-02-14 12:10:56,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 12:10:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 12:10:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 12:10:57,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:10:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:57,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:57,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977500154] [2023-02-14 12:10:57,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:57,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720488030] [2023-02-14 12:10:57,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720488030] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:10:57,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:10:57,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-02-14 12:10:57,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130363176] [2023-02-14 12:10:57,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:10:57,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 12:10:57,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 12:10:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 12:10:57,232 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:10:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:57,436 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2023-02-14 12:10:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 12:10:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-14 12:10:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:57,438 INFO L225 Difference]: With dead ends: 183 [2023-02-14 12:10:57,438 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 12:10:57,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-02-14 12:10:57,439 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 108 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:57,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 343 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:10:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 12:10:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2023-02-14 12:10:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-14 12:10:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2023-02-14 12:10:57,453 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2023-02-14 12:10:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:57,453 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2023-02-14 12:10:57,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:10:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2023-02-14 12:10:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 12:10:57,454 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:57,454 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 12:10:57,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 12:10:57,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:57,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2023-02-14 12:10:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198016172] [2023-02-14 12:10:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:57,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883149933] [2023-02-14 12:10:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:57,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:57,686 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) [2023-02-14 12:10:57,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 12:10:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 12:10:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:57,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:10:57,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198016172] [2023-02-14 12:10:57,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883149933] [2023-02-14 12:10:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883149933] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:10:57,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:10:57,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 12:10:57,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585803856] [2023-02-14 12:10:57,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:10:57,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 12:10:57,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 12:10:57,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 12:10:57,756 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:57,776 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2023-02-14 12:10:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:10:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-02-14 12:10:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:57,778 INFO L225 Difference]: With dead ends: 237 [2023-02-14 12:10:57,778 INFO L226 Difference]: Without dead ends: 170 [2023-02-14 12:10:57,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 12:10:57,779 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:57,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 128 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:10:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-14 12:10:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-02-14 12:10:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-14 12:10:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2023-02-14 12:10:57,792 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2023-02-14 12:10:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:57,792 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2023-02-14 12:10:57,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:10:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2023-02-14 12:10:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 12:10:57,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:57,793 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 12:10:57,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 12:10:57,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 12:10:57,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2023-02-14 12:10:57,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:57,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351842389] [2023-02-14 12:10:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:57,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:58,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:58,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651079040] [2023-02-14 12:10:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:58,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:58,029 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) [2023-02-14 12:10:58,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 12:10:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 12:10:58,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 12:10:58,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:10:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 12:10:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351842389] [2023-02-14 12:10:58,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651079040] [2023-02-14 12:10:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651079040] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 12:10:58,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 12:10:58,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-14 12:10:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166543821] [2023-02-14 12:10:58,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:10:58,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 12:10:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 12:10:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 12:10:58,237 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:10:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:10:58,295 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2023-02-14 12:10:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:10:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-14 12:10:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:10:58,297 INFO L225 Difference]: With dead ends: 235 [2023-02-14 12:10:58,297 INFO L226 Difference]: Without dead ends: 233 [2023-02-14 12:10:58,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 12:10:58,298 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:10:58,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:10:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-14 12:10:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2023-02-14 12:10:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-14 12:10:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2023-02-14 12:10:58,318 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2023-02-14 12:10:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:10:58,318 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2023-02-14 12:10:58,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:10:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2023-02-14 12:10:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 12:10:58,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:10:58,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:10:58,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 12:10:58,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 12:10:58,524 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:10:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:10:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2023-02-14 12:10:58,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:10:58,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242172390] [2023-02-14 12:10:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:58,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:10:58,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:10:58,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089817769] [2023-02-14 12:10:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:10:58,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:10:58,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:10:58,550 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) [2023-02-14 12:10:58,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 12:10:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:10:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-14 12:10:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:10:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 12:10:58,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:10:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:10:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:10:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242172390] [2023-02-14 12:10:59,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:10:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089817769] [2023-02-14 12:10:59,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089817769] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:10:59,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:10:59,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-02-14 12:10:59,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359909556] [2023-02-14 12:10:59,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:10:59,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 12:10:59,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:10:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 12:10:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-14 12:10:59,154 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 12:11:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:11:07,067 INFO L93 Difference]: Finished difference Result 370 states and 531 transitions. [2023-02-14 12:11:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 12:11:07,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2023-02-14 12:11:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:11:07,088 INFO L225 Difference]: With dead ends: 370 [2023-02-14 12:11:07,088 INFO L226 Difference]: Without dead ends: 368 [2023-02-14 12:11:07,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 12:11:07,090 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 208 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:11:07,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 349 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-14 12:11:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-02-14 12:11:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 315. [2023-02-14 12:11:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 235 states have (on average 1.3914893617021276) internal successors, (327), 242 states have internal predecessors, (327), 63 states have call successors, (63), 16 states have call predecessors, (63), 16 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-14 12:11:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 452 transitions. [2023-02-14 12:11:07,141 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 452 transitions. Word has length 37 [2023-02-14 12:11:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:11:07,142 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 452 transitions. [2023-02-14 12:11:07,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 12:11:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 452 transitions. [2023-02-14 12:11:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 12:11:07,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:11:07,144 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-02-14 12:11:07,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 12:11:07,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 12:11:07,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:11:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:11:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2023-02-14 12:11:07,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:11:07,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602597494] [2023-02-14 12:11:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:07,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:11:07,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:11:07,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144803243] [2023-02-14 12:11:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:11:07,361 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) [2023-02-14 12:11:07,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 12:11:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:11:07,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 12:11:07,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:11:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 12:11:07,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:11:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 12:11:07,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:11:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602597494] [2023-02-14 12:11:07,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:11:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144803243] [2023-02-14 12:11:07,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144803243] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 12:11:07,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 12:11:07,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-14 12:11:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437575584] [2023-02-14 12:11:07,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:11:07,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 12:11:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:11:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 12:11:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 12:11:07,715 INFO L87 Difference]: Start difference. First operand 315 states and 452 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 12:11:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:11:07,787 INFO L93 Difference]: Finished difference Result 324 states and 460 transitions. [2023-02-14 12:11:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:11:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-02-14 12:11:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:11:07,790 INFO L225 Difference]: With dead ends: 324 [2023-02-14 12:11:07,790 INFO L226 Difference]: Without dead ends: 322 [2023-02-14 12:11:07,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 12:11:07,792 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:11:07,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:11:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-02-14 12:11:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-02-14 12:11:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 238 states have (on average 1.3781512605042017) internal successors, (328), 245 states have internal predecessors, (328), 63 states have call successors, (63), 17 states have call predecessors, (63), 17 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-14 12:11:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 453 transitions. [2023-02-14 12:11:07,842 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 453 transitions. Word has length 40 [2023-02-14 12:11:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:11:07,842 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 453 transitions. [2023-02-14 12:11:07,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 12:11:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 453 transitions. [2023-02-14 12:11:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 12:11:07,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:11:07,844 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:11:07,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 12:11:08,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 12:11:08,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:11:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:11:08,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2023-02-14 12:11:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:11:08,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489577564] [2023-02-14 12:11:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:08,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:11:08,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:11:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943432014] [2023-02-14 12:11:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:08,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:11:08,069 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) [2023-02-14 12:11:08,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 12:11:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:11:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 12:11:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:11:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 12:11:08,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:11:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 12:11:08,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:11:08,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489577564] [2023-02-14 12:11:08,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:11:08,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943432014] [2023-02-14 12:11:08,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943432014] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:11:08,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:11:08,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-14 12:11:08,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477147920] [2023-02-14 12:11:08,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:11:08,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 12:11:08,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:11:08,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 12:11:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-14 12:11:08,197 INFO L87 Difference]: Start difference. First operand 319 states and 453 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:11:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:11:08,404 INFO L93 Difference]: Finished difference Result 781 states and 1094 transitions. [2023-02-14 12:11:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 12:11:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-02-14 12:11:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:11:08,406 INFO L225 Difference]: With dead ends: 781 [2023-02-14 12:11:08,406 INFO L226 Difference]: Without dead ends: 592 [2023-02-14 12:11:08,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-02-14 12:11:08,408 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 134 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:11:08,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 331 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:11:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-02-14 12:11:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 562. [2023-02-14 12:11:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 406 states have (on average 1.3177339901477831) internal successors, (535), 416 states have internal predecessors, (535), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2023-02-14 12:11:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 759 transitions. [2023-02-14 12:11:08,481 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 759 transitions. Word has length 38 [2023-02-14 12:11:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:11:08,481 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 759 transitions. [2023-02-14 12:11:08,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:11:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 759 transitions. [2023-02-14 12:11:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 12:11:08,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:11:08,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:11:08,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 12:11:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:08,687 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:11:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:11:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2023-02-14 12:11:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:11:08,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196625233] [2023-02-14 12:11:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:11:08,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:11:08,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226351691] [2023-02-14 12:11:08,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 12:11:08,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:08,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:11:08,695 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) [2023-02-14 12:11:08,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 12:11:08,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 12:11:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 12:11:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 12:11:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:11:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:11:08,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:11:08,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:11:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196625233] [2023-02-14 12:11:08,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:11:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226351691] [2023-02-14 12:11:08,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226351691] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:11:08,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:11:08,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 12:11:08,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857047921] [2023-02-14 12:11:08,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:11:08,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 12:11:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:11:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 12:11:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 12:11:08,753 INFO L87 Difference]: Start difference. First operand 562 states and 759 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:11:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:11:09,016 INFO L93 Difference]: Finished difference Result 874 states and 1229 transitions. [2023-02-14 12:11:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:11:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-02-14 12:11:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:11:09,020 INFO L225 Difference]: With dead ends: 874 [2023-02-14 12:11:09,020 INFO L226 Difference]: Without dead ends: 679 [2023-02-14 12:11:09,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 12:11:09,021 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:11:09,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:11:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2023-02-14 12:11:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 553. [2023-02-14 12:11:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 401 states have (on average 1.3167082294264338) internal successors, (528), 411 states have internal predecessors, (528), 110 states have call successors, (110), 41 states have call predecessors, (110), 41 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2023-02-14 12:11:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 744 transitions. [2023-02-14 12:11:09,111 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 744 transitions. Word has length 39 [2023-02-14 12:11:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:11:09,111 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 744 transitions. [2023-02-14 12:11:09,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 12:11:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 744 transitions. [2023-02-14 12:11:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 12:11:09,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:11:09,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:11:09,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 12:11:09,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 12:11:09,317 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:11:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:11:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2023-02-14 12:11:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:11:09,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443341694] [2023-02-14 12:11:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:11:09,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:11:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077694800] [2023-02-14 12:11:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:09,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:11:09,336 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) [2023-02-14 12:11:09,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 12:11:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:11:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 12:11:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:11:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:11:09,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:11:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 12:11:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:11:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443341694] [2023-02-14 12:11:09,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:11:09,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077694800] [2023-02-14 12:11:09,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077694800] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:11:09,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:11:09,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-14 12:11:09,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225309959] [2023-02-14 12:11:09,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:11:09,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 12:11:09,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:11:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 12:11:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-14 12:11:09,487 INFO L87 Difference]: Start difference. First operand 553 states and 744 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:11:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:11:09,800 INFO L93 Difference]: Finished difference Result 1157 states and 1577 transitions. [2023-02-14 12:11:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 12:11:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-02-14 12:11:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:11:09,803 INFO L225 Difference]: With dead ends: 1157 [2023-02-14 12:11:09,803 INFO L226 Difference]: Without dead ends: 817 [2023-02-14 12:11:09,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-02-14 12:11:09,805 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 185 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 12:11:09,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 377 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 12:11:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-02-14 12:11:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 780. [2023-02-14 12:11:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 558 states have (on average 1.2724014336917562) internal successors, (710), 572 states have internal predecessors, (710), 164 states have call successors, (164), 57 states have call predecessors, (164), 57 states have return successors, (158), 150 states have call predecessors, (158), 158 states have call successors, (158) [2023-02-14 12:11:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1032 transitions. [2023-02-14 12:11:09,913 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1032 transitions. Word has length 39 [2023-02-14 12:11:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:11:09,914 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1032 transitions. [2023-02-14 12:11:09,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:11:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1032 transitions. [2023-02-14 12:11:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 12:11:09,914 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:11:09,915 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-02-14 12:11:09,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-14 12:11:10,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 12:11:10,121 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:11:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:11:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2023-02-14 12:11:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:11:10,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599750472] [2023-02-14 12:11:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:10,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:11:10,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:11:10,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730967695] [2023-02-14 12:11:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:10,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:10,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:11:10,128 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) [2023-02-14 12:11:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 12:11:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:11:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 12:11:10,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:11:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 12:11:10,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:11:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 12:11:11,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:11:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599750472] [2023-02-14 12:11:11,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:11:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730967695] [2023-02-14 12:11:11,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730967695] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:11:11,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:11:11,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-14 12:11:11,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965127071] [2023-02-14 12:11:11,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:11:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 12:11:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:11:11,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 12:11:11,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-14 12:11:11,733 INFO L87 Difference]: Start difference. First operand 780 states and 1032 transitions. Second operand has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 12:11:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:11:22,858 INFO L93 Difference]: Finished difference Result 1403 states and 1876 transitions. [2023-02-14 12:11:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-14 12:11:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 54 [2023-02-14 12:11:22,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:11:22,862 INFO L225 Difference]: With dead ends: 1403 [2023-02-14 12:11:22,862 INFO L226 Difference]: Without dead ends: 1060 [2023-02-14 12:11:22,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2023-02-14 12:11:22,864 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 261 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:11:22,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 659 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-14 12:11:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-02-14 12:11:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 909. [2023-02-14 12:11:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 664 states have (on average 1.2725903614457832) internal successors, (845), 673 states have internal predecessors, (845), 180 states have call successors, (180), 64 states have call predecessors, (180), 64 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2023-02-14 12:11:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1201 transitions. [2023-02-14 12:11:23,061 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1201 transitions. Word has length 54 [2023-02-14 12:11:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:11:23,061 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1201 transitions. [2023-02-14 12:11:23,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 12:11:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1201 transitions. [2023-02-14 12:11:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 12:11:23,062 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:11:23,062 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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] [2023-02-14 12:11:23,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 12:11:23,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 12:11:23,267 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:11:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:11:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2023-02-14 12:11:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:11:23,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795923732] [2023-02-14 12:11:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:11:23,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:11:23,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589802383] [2023-02-14 12:11:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:23,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:11:23,281 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) [2023-02-14 12:11:23,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 12:11:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:11:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 12:11:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:11:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 12:11:23,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:11:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 12:11:23,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:11:23,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795923732] [2023-02-14 12:11:23,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:11:23,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589802383] [2023-02-14 12:11:23,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589802383] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:11:23,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:11:23,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-14 12:11:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718348645] [2023-02-14 12:11:23,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:11:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 12:11:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:11:23,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 12:11:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-14 12:11:23,532 INFO L87 Difference]: Start difference. First operand 909 states and 1201 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 12:11:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:11:24,235 INFO L93 Difference]: Finished difference Result 2055 states and 2844 transitions. [2023-02-14 12:11:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 12:11:24,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2023-02-14 12:11:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:11:24,241 INFO L225 Difference]: With dead ends: 2055 [2023-02-14 12:11:24,242 INFO L226 Difference]: Without dead ends: 2033 [2023-02-14 12:11:24,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-02-14 12:11:24,243 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 311 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 12:11:24,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 400 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 12:11:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2023-02-14 12:11:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1919. [2023-02-14 12:11:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1425 states have (on average 1.2947368421052632) internal successors, (1845), 1457 states have internal predecessors, (1845), 389 states have call successors, (389), 104 states have call predecessors, (389), 104 states have return successors, (382), 357 states have call predecessors, (382), 382 states have call successors, (382) [2023-02-14 12:11:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2616 transitions. [2023-02-14 12:11:24,714 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2616 transitions. Word has length 60 [2023-02-14 12:11:24,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:11:24,714 INFO L495 AbstractCegarLoop]: Abstraction has 1919 states and 2616 transitions. [2023-02-14 12:11:24,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 12:11:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2616 transitions. [2023-02-14 12:11:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-14 12:11:24,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:11:24,715 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:11:24,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 12:11:24,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 12:11:24,921 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:11:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:11:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 1 times [2023-02-14 12:11:24,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:11:24,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179998793] [2023-02-14 12:11:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:11:24,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:11:24,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397117429] [2023-02-14 12:11:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:11:24,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:11:24,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:11:24,928 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) [2023-02-14 12:11:24,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 12:11:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:11:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 12:11:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:11:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 12:11:25,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:11:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 12:11:25,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:11:25,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179998793] [2023-02-14 12:11:25,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:11:25,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397117429] [2023-02-14 12:11:25,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397117429] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:11:25,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:11:25,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-14 12:11:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844412190] [2023-02-14 12:11:25,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:11:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 12:11:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:11:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 12:11:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-14 12:11:25,888 INFO L87 Difference]: Start difference. First operand 1919 states and 2616 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 12:12:05,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:12:09,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:12:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:12:12,755 INFO L93 Difference]: Finished difference Result 2735 states and 3823 transitions. [2023-02-14 12:12:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-14 12:12:12,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 66 [2023-02-14 12:12:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:12:12,764 INFO L225 Difference]: With dead ends: 2735 [2023-02-14 12:12:12,765 INFO L226 Difference]: Without dead ends: 2733 [2023-02-14 12:12:12,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=573, Invalid=2967, Unknown=0, NotChecked=0, Total=3540 [2023-02-14 12:12:12,768 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 291 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 271 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2023-02-14 12:12:12,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 791 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1632 Invalid, 2 Unknown, 0 Unchecked, 22.4s Time] [2023-02-14 12:12:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2023-02-14 12:12:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2047. [2023-02-14 12:12:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 1534 states have (on average 1.2972620599739244) internal successors, (1990), 1574 states have internal predecessors, (1990), 401 states have call successors, (401), 111 states have call predecessors, (401), 111 states have return successors, (394), 361 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-14 12:12:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 2785 transitions. [2023-02-14 12:12:13,276 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 2785 transitions. Word has length 66 [2023-02-14 12:12:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:12:13,276 INFO L495 AbstractCegarLoop]: Abstraction has 2047 states and 2785 transitions. [2023-02-14 12:12:13,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 12:12:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 2785 transitions. [2023-02-14 12:12:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 12:12:13,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:12:13,277 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:12:13,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 12:12:13,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:12:13,481 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:12:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:12:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 2 times [2023-02-14 12:12:13,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:12:13,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95917501] [2023-02-14 12:12:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:12:13,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:12:13,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:12:13,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710893746] [2023-02-14 12:12:13,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 12:12:13,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:12:13,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:12:13,489 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) [2023-02-14 12:12:13,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 12:12:13,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 12:12:13,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 12:12:13,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 12:12:13,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:12:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 12:12:13,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:12:13,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:12:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95917501] [2023-02-14 12:12:13,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:12:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710893746] [2023-02-14 12:12:13,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710893746] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:12:13,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:12:13,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 12:12:13,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227077956] [2023-02-14 12:12:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:12:13,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 12:12:13,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:12:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 12:12:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 12:12:13,558 INFO L87 Difference]: Start difference. First operand 2047 states and 2785 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-14 12:12:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:12:14,140 INFO L93 Difference]: Finished difference Result 3624 states and 5009 transitions. [2023-02-14 12:12:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:12:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2023-02-14 12:12:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:12:14,148 INFO L225 Difference]: With dead ends: 3624 [2023-02-14 12:12:14,148 INFO L226 Difference]: Without dead ends: 2427 [2023-02-14 12:12:14,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 12:12:14,151 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:12:14,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:12:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2023-02-14 12:12:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2265. [2023-02-14 12:12:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 1658 states have (on average 1.2979493365500603) internal successors, (2152), 1698 states have internal predecessors, (2152), 495 states have call successors, (495), 111 states have call predecessors, (495), 111 states have return successors, (488), 455 states have call predecessors, (488), 488 states have call successors, (488) [2023-02-14 12:12:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3135 transitions. [2023-02-14 12:12:14,789 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3135 transitions. Word has length 69 [2023-02-14 12:12:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:12:14,789 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 3135 transitions. [2023-02-14 12:12:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-14 12:12:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3135 transitions. [2023-02-14 12:12:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 12:12:14,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:12:14,790 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:12:14,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-14 12:12:14,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:12:14,993 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:12:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:12:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 3 times [2023-02-14 12:12:14,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:12:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133939595] [2023-02-14 12:12:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:12:14,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:12:14,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:12:14,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342780604] [2023-02-14 12:12:14,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 12:12:14,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:12:14,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:12:15,002 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) [2023-02-14 12:12:15,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 12:12:15,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 12:12:15,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 12:12:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 12:12:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:12:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-14 12:12:15,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:12:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 12:12:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:12:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133939595] [2023-02-14 12:12:17,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:12:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342780604] [2023-02-14 12:12:17,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342780604] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:12:17,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:12:17,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-14 12:12:17,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183468620] [2023-02-14 12:12:17,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:12:17,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 12:12:17,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:12:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 12:12:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-02-14 12:12:17,487 INFO L87 Difference]: Start difference. First operand 2265 states and 3135 transitions. Second operand has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 12:12:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:12:53,423 INFO L93 Difference]: Finished difference Result 2927 states and 4070 transitions. [2023-02-14 12:12:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-14 12:12:53,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 71 [2023-02-14 12:12:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:12:53,431 INFO L225 Difference]: With dead ends: 2927 [2023-02-14 12:12:53,432 INFO L226 Difference]: Without dead ends: 2925 [2023-02-14 12:12:53,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=978, Invalid=3578, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 12:12:53,434 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 533 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2023-02-14 12:12:53,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1065 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2023-02-14 12:12:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2023-02-14 12:12:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2594. [2023-02-14 12:12:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 1915 states have (on average 1.2971279373368145) internal successors, (2484), 1962 states have internal predecessors, (2484), 540 states have call successors, (540), 138 states have call predecessors, (540), 138 states have return successors, (533), 493 states have call predecessors, (533), 533 states have call successors, (533) [2023-02-14 12:12:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3557 transitions. [2023-02-14 12:12:54,214 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3557 transitions. Word has length 71 [2023-02-14 12:12:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:12:54,214 INFO L495 AbstractCegarLoop]: Abstraction has 2594 states and 3557 transitions. [2023-02-14 12:12:54,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 12:12:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3557 transitions. [2023-02-14 12:12:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-14 12:12:54,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:12:54,215 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:12:54,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-14 12:12:54,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:12:54,422 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:12:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:12:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 940337767, now seen corresponding path program 1 times [2023-02-14 12:12:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:12:54,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834439999] [2023-02-14 12:12:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:12:54,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:12:54,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:12:54,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640412097] [2023-02-14 12:12:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:12:54,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:12:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:12:54,432 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) [2023-02-14 12:12:54,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 12:12:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:12:54,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 12:12:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:12:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-14 12:12:54,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:12:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-14 12:12:55,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:12:55,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834439999] [2023-02-14 12:12:55,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:12:55,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640412097] [2023-02-14 12:12:55,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640412097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:12:55,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:12:55,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-14 12:12:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549133965] [2023-02-14 12:12:55,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:12:55,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 12:12:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:12:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 12:12:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-14 12:12:55,110 INFO L87 Difference]: Start difference. First operand 2594 states and 3557 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-14 12:12:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:12:58,430 INFO L93 Difference]: Finished difference Result 3911 states and 5653 transitions. [2023-02-14 12:12:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 12:12:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 85 [2023-02-14 12:12:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:12:58,444 INFO L225 Difference]: With dead ends: 3911 [2023-02-14 12:12:58,444 INFO L226 Difference]: Without dead ends: 3909 [2023-02-14 12:12:58,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 12:12:58,446 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 207 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:12:58,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 735 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-14 12:12:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2023-02-14 12:12:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3544. [2023-02-14 12:12:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2393 states have (on average 1.3418303384872545) internal successors, (3211), 2464 states have internal predecessors, (3211), 996 states have call successors, (996), 154 states have call predecessors, (996), 154 states have return successors, (989), 925 states have call predecessors, (989), 989 states have call successors, (989) [2023-02-14 12:12:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5196 transitions. [2023-02-14 12:12:59,886 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5196 transitions. Word has length 85 [2023-02-14 12:12:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:12:59,886 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 5196 transitions. [2023-02-14 12:12:59,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-14 12:12:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5196 transitions. [2023-02-14 12:12:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-14 12:12:59,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:12:59,888 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:12:59,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 12:13:00,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:13:00,102 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:13:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:13:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2023-02-14 12:13:00,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:13:00,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400847386] [2023-02-14 12:13:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:13:00,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:13:00,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:13:00,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723649648] [2023-02-14 12:13:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:13:00,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:13:00,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:13:00,112 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) [2023-02-14 12:13:00,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 12:13:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:13:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-14 12:13:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:13:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-14 12:13:01,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:13:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-14 12:13:05,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:13:05,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400847386] [2023-02-14 12:13:05,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:13:05,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723649648] [2023-02-14 12:13:05,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723649648] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:13:05,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:13:05,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-14 12:13:05,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644325154] [2023-02-14 12:13:05,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:13:05,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 12:13:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:13:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 12:13:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 12:13:05,092 INFO L87 Difference]: Start difference. First operand 3544 states and 5196 transitions. Second operand has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-14 12:14:23,055 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 110 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 12:14:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:14:37,827 INFO L93 Difference]: Finished difference Result 5248 states and 7800 transitions. [2023-02-14 12:14:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-14 12:14:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 84 [2023-02-14 12:14:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:14:37,875 INFO L225 Difference]: With dead ends: 5248 [2023-02-14 12:14:37,887 INFO L226 Difference]: Without dead ends: 5211 [2023-02-14 12:14:37,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5060 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=2693, Invalid=11349, Unknown=0, NotChecked=0, Total=14042 [2023-02-14 12:14:37,891 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 564 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:14:37,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1080 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 33.0s Time] [2023-02-14 12:14:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2023-02-14 12:14:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 4002. [2023-02-14 12:14:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 2768 states have (on average 1.3435693641618498) internal successors, (3719), 2841 states have internal predecessors, (3719), 1069 states have call successors, (1069), 164 states have call predecessors, (1069), 164 states have return successors, (1062), 996 states have call predecessors, (1062), 1062 states have call successors, (1062) [2023-02-14 12:14:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5850 transitions. [2023-02-14 12:14:40,413 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5850 transitions. Word has length 84 [2023-02-14 12:14:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:14:40,413 INFO L495 AbstractCegarLoop]: Abstraction has 4002 states and 5850 transitions. [2023-02-14 12:14:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-14 12:14:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5850 transitions. [2023-02-14 12:14:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 12:14:40,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:14:40,414 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:14:40,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-14 12:14:40,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:14:40,619 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:14:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:14:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1186023176, now seen corresponding path program 1 times [2023-02-14 12:14:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:14:40,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835778231] [2023-02-14 12:14:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:14:40,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:14:40,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:14:40,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138080234] [2023-02-14 12:14:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:14:40,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:14:40,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:14:40,631 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) [2023-02-14 12:14:40,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 12:14:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:14:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-14 12:14:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:14:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-14 12:14:41,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:14:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-14 12:14:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:14:42,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835778231] [2023-02-14 12:14:42,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:14:42,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138080234] [2023-02-14 12:14:42,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138080234] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:14:42,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:14:42,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2023-02-14 12:14:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050154429] [2023-02-14 12:14:42,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:14:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 12:14:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:14:42,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 12:14:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-02-14 12:14:42,558 INFO L87 Difference]: Start difference. First operand 4002 states and 5850 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-14 12:15:02,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []