./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/fermat1-ll_unwindbound10.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 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:29:58,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:29:58,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:29:58,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:29:58,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:29:58,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:29:58,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:29:58,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:29:58,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:29:58,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:29:58,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:29:58,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:29:58,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:29:58,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:29:58,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:29:58,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:29:58,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:29:58,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:29:58,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:29:58,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:29:58,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:29:58,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:29:58,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:29:58,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:29:58,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:29:58,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:29:58,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:29:58,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:29:58,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:29:58,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:29:58,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:29:58,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:29:58,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:29:58,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:29:58,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:29:58,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:29:58,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:29:58,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:29:58,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:29:58,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:29:58,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:29:58,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 17:29:58,972 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:29:58,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:29:58,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:29:58,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:29:58,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:29:58,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:29:58,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:29:58,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:29:58,980 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:29:58,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:29:58,981 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:29:58,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 17:29:58,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:29:58,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:29:58,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:29:58,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:29:58,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:29:58,982 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:29:58,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:29:58,982 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:29:58,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:29:58,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:29:58,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:29:58,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:29:58,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:29:58,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:29:58,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:29:58,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:29:58,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 17:29:58,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 17:29:58,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:29:58,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:29:58,984 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:29:58,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:29:58,984 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:29:58,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 [2023-02-18 17:29:59,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:29:59,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:29:59,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:29:59,164 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:29:59,164 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:29:59,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2023-02-18 17:30:00,083 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:30:00,272 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:30:00,274 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2023-02-18 17:30:00,279 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958899fed/af3ba01007824b51a23f8002928df598/FLAG4a5affabf [2023-02-18 17:30:00,681 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958899fed/af3ba01007824b51a23f8002928df598 [2023-02-18 17:30:00,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:30:00,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:30:00,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:30:00,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:30:00,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:30:00,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381d9627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00, skipping insertion in model container [2023-02-18 17:30:00,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:30:00,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:30:00,796 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/fermat1-ll_unwindbound10.c[535,548] [2023-02-18 17:30:00,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:30:00,815 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:30:00,821 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/fermat1-ll_unwindbound10.c[535,548] [2023-02-18 17:30:00,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:30:00,834 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:30:00,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00 WrapperNode [2023-02-18 17:30:00,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:30:00,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:30:00,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:30:00,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:30:00,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,855 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-18 17:30:00,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:30:00,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:30:00,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:30:00,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:30:00,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,868 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:30:00,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:30:00,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:30:00,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:30:00,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (1/1) ... [2023-02-18 17:30:00,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:30:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:00,895 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) [2023-02-18 17:30:00,900 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 [2023-02-18 17:30:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:30:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 17:30:00,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 17:30:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 17:30:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:30:00,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:30:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:30:00,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:30:00,968 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:30:00,969 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:30:01,103 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:30:01,107 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:30:01,108 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 17:30:01,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:30:01 BoogieIcfgContainer [2023-02-18 17:30:01,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:30:01,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:30:01,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:30:01,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:30:01,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:30:00" (1/3) ... [2023-02-18 17:30:01,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69db6e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:30:01, skipping insertion in model container [2023-02-18 17:30:01,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:30:00" (2/3) ... [2023-02-18 17:30:01,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69db6e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:30:01, skipping insertion in model container [2023-02-18 17:30:01,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:30:01" (3/3) ... [2023-02-18 17:30:01,114 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.c [2023-02-18 17:30:01,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:30:01,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:30:01,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:30:01,157 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;@16e3a0a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:30:01,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:30:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 17:30:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 17:30:01,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:01,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:01,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2023-02-18 17:30:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:01,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638462967] [2023-02-18 17:30:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:01,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:01,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600397371] [2023-02-18 17:30:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:01,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:01,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:01,289 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) [2023-02-18 17:30:01,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 17:30:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:01,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:30:01,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 17:30:01,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:30:01,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638462967] [2023-02-18 17:30:01,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600397371] [2023-02-18 17:30:01,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600397371] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:30:01,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:30:01,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:30:01,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954123596] [2023-02-18 17:30:01,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:30:01,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:30:01,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:30:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:30:01,397 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2023-02-18 17:30:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:01,410 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2023-02-18 17:30:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:30:01,412 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 [2023-02-18 17:30:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:01,416 INFO L225 Difference]: With dead ends: 61 [2023-02-18 17:30:01,416 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 17:30:01,418 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 [2023-02-18 17:30:01,433 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2023-02-18 17:30:01,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:30:01,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 17:30:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 17:30:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 17:30:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-18 17:30:01,455 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2023-02-18 17:30:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:01,456 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-18 17:30:01,456 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) [2023-02-18 17:30:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-18 17:30:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 17:30:01,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:01,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:01,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:01,660 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 [2023-02-18 17:30:01,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2023-02-18 17:30:01,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:01,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544105035] [2023-02-18 17:30:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:01,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:01,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:01,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448192782] [2023-02-18 17:30:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:01,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:01,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:01,680 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) [2023-02-18 17:30:01,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 17:30:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:01,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 17:30:01,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:01,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:30:01,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544105035] [2023-02-18 17:30:01,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448192782] [2023-02-18 17:30:01,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448192782] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:30:01,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:30:01,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 17:30:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172607083] [2023-02-18 17:30:01,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:30:01,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 17:30:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 17:30:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:30:01,783 INFO L87 Difference]: Start difference. First operand 28 states and 37 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) [2023-02-18 17:30:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:01,798 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-02-18 17:30:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 17:30:01,798 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 [2023-02-18 17:30:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:01,813 INFO L225 Difference]: With dead ends: 37 [2023-02-18 17:30:01,813 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 17:30:01,814 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 [2023-02-18 17:30:01,814 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 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 [2023-02-18 17:30:01,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:30:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 17:30:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-18 17:30:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 17:30:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-18 17:30:01,820 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-02-18 17:30:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:01,821 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-18 17:30:01,821 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) [2023-02-18 17:30:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-18 17:30:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 17:30:01,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:01,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:01,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 17:30:02,027 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 [2023-02-18 17:30:02,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2023-02-18 17:30:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:02,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254458102] [2023-02-18 17:30:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:02,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:02,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401024737] [2023-02-18 17:30:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:02,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:02,053 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) [2023-02-18 17:30:02,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 17:30:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:02,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 17:30:02,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:02,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:30:02,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:02,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254458102] [2023-02-18 17:30:02,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:02,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401024737] [2023-02-18 17:30:02,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401024737] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:30:02,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:30:02,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:30:02,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109949998] [2023-02-18 17:30:02,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:30:02,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:30:02,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:30:02,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:30:02,175 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2023-02-18 17:30:04,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:04,796 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-02-18 17:30:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 17:30:04,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2023-02-18 17:30:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:04,797 INFO L225 Difference]: With dead ends: 49 [2023-02-18 17:30:04,798 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 17:30:04,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:30:04,799 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:04,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-18 17:30:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 17:30:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-18 17:30:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 17:30:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2023-02-18 17:30:04,815 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2023-02-18 17:30:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:04,816 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2023-02-18 17:30:04,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2023-02-18 17:30:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2023-02-18 17:30:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 17:30:04,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:04,820 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] [2023-02-18 17:30:04,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:05,025 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 [2023-02-18 17:30:05,026 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2023-02-18 17:30:05,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:05,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768608446] [2023-02-18 17:30:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:05,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:05,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551829574] [2023-02-18 17:30:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:05,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:05,050 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) [2023-02-18 17:30:05,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 17:30:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:05,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 17:30:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:05,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:05,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768608446] [2023-02-18 17:30:05,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551829574] [2023-02-18 17:30:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551829574] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:30:05,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:05,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-18 17:30:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086682296] [2023-02-18 17:30:05,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:05,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 17:30:05,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:05,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 17:30:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 17:30:05,224 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 17:30:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:05,328 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-18 17:30:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 17:30:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-02-18 17:30:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:05,329 INFO L225 Difference]: With dead ends: 53 [2023-02-18 17:30:05,329 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 17:30:05,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:30:05,330 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:05,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 139 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:30:05,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 17:30:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-02-18 17:30:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 17:30:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-02-18 17:30:05,338 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2023-02-18 17:30:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:05,338 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-02-18 17:30:05,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 17:30:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-02-18 17:30:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 17:30:05,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:05,339 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, 1, 1, 1, 1] [2023-02-18 17:30:05,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:05,544 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 [2023-02-18 17:30:05,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:05,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2023-02-18 17:30:05,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:05,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106636131] [2023-02-18 17:30:05,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:05,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:05,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:05,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930024739] [2023-02-18 17:30:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:05,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:05,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:05,577 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) [2023-02-18 17:30:05,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 17:30:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:05,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:30:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:05,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:30:05,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106636131] [2023-02-18 17:30:05,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930024739] [2023-02-18 17:30:05,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930024739] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:30:05,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:30:05,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 17:30:05,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512864747] [2023-02-18 17:30:05,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:30:05,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:30:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:30:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:30:05,640 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 17:30:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:05,665 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-02-18 17:30:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 17:30:05,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 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 31 [2023-02-18 17:30:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:05,666 INFO L225 Difference]: With dead ends: 61 [2023-02-18 17:30:05,666 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 17:30:05,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:30:05,677 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:05,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:30:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 17:30:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-02-18 17:30:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 17:30:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-18 17:30:05,687 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2023-02-18 17:30:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:05,688 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-18 17:30:05,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 17:30:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-18 17:30:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 17:30:05,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:05,689 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:05,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:05,893 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 [2023-02-18 17:30:05,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2023-02-18 17:30:05,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:05,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634247319] [2023-02-18 17:30:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:05,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030068162] [2023-02-18 17:30:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:05,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:05,905 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) [2023-02-18 17:30:05,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 17:30:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:30:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:05,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 17:30:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634247319] [2023-02-18 17:30:05,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030068162] [2023-02-18 17:30:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030068162] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:30:05,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:30:05,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-02-18 17:30:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698704080] [2023-02-18 17:30:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:30:05,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 17:30:05,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 17:30:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:30:05,977 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 17:30:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:06,002 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-02-18 17:30:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:30:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-02-18 17:30:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:06,004 INFO L225 Difference]: With dead ends: 70 [2023-02-18 17:30:06,004 INFO L226 Difference]: Without dead ends: 49 [2023-02-18 17:30:06,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:30:06,005 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:06,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 114 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:30:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-18 17:30:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-18 17:30:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 17:30:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-18 17:30:06,013 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2023-02-18 17:30:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:06,013 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-18 17:30:06,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 17:30:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-18 17:30:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 17:30:06,014 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:06,014 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:06,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:06,219 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 [2023-02-18 17:30:06,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2023-02-18 17:30:06,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:06,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280097226] [2023-02-18 17:30:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:06,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:06,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359339249] [2023-02-18 17:30:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:06,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:06,253 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) [2023-02-18 17:30:06,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 17:30:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:30:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:06,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 17:30:06,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:06,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280097226] [2023-02-18 17:30:06,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:06,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359339249] [2023-02-18 17:30:06,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359339249] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:30:06,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:06,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 17:30:06,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978150724] [2023-02-18 17:30:06,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:06,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 17:30:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 17:30:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:30:06,321 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-18 17:30:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:06,403 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2023-02-18 17:30:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 17:30:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2023-02-18 17:30:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:06,404 INFO L225 Difference]: With dead ends: 125 [2023-02-18 17:30:06,410 INFO L226 Difference]: Without dead ends: 104 [2023-02-18 17:30:06,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:30:06,411 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:06,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 208 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:30:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-18 17:30:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2023-02-18 17:30:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 17:30:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-02-18 17:30:06,445 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2023-02-18 17:30:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:06,446 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-02-18 17:30:06,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-18 17:30:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-02-18 17:30:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 17:30:06,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:06,450 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:06,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 17:30:06,655 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 [2023-02-18 17:30:06,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2023-02-18 17:30:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:06,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872179726] [2023-02-18 17:30:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:06,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:06,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302281591] [2023-02-18 17:30:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:06,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:06,677 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) [2023-02-18 17:30:06,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 17:30:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:06,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 17:30:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:30:06,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:30:06,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:06,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872179726] [2023-02-18 17:30:06,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:06,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302281591] [2023-02-18 17:30:06,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302281591] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:30:06,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:30:06,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 17:30:06,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262448541] [2023-02-18 17:30:06,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:30:06,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 17:30:06,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 17:30:06,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:30:06,738 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 17:30:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:06,830 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2023-02-18 17:30:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 17:30:06,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-02-18 17:30:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:06,833 INFO L225 Difference]: With dead ends: 154 [2023-02-18 17:30:06,833 INFO L226 Difference]: Without dead ends: 115 [2023-02-18 17:30:06,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:30:06,834 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:06,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 111 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:30:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-18 17:30:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2023-02-18 17:30:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 17:30:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-18 17:30:06,862 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2023-02-18 17:30:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:06,862 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-18 17:30:06,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 17:30:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-18 17:30:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 17:30:06,865 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:06,865 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:06,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 17:30:07,069 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 [2023-02-18 17:30:07,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2023-02-18 17:30:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:07,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87077040] [2023-02-18 17:30:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:07,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920654370] [2023-02-18 17:30:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:07,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:07,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:07,097 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) [2023-02-18 17:30:07,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 17:30:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:30:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:07,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:30:07,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:07,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87077040] [2023-02-18 17:30:07,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:07,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920654370] [2023-02-18 17:30:07,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920654370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:30:07,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:07,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-18 17:30:07,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869373455] [2023-02-18 17:30:07,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:30:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:30:07,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:30:07,277 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-18 17:30:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:07,417 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2023-02-18 17:30:07,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 17:30:07,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2023-02-18 17:30:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:07,419 INFO L225 Difference]: With dead ends: 215 [2023-02-18 17:30:07,419 INFO L226 Difference]: Without dead ends: 168 [2023-02-18 17:30:07,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-02-18 17:30:07,422 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:07,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 244 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:30:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-18 17:30:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2023-02-18 17:30:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-18 17:30:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2023-02-18 17:30:07,446 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2023-02-18 17:30:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:07,447 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2023-02-18 17:30:07,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-18 17:30:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2023-02-18 17:30:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 17:30:07,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:07,449 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:07,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:07,653 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 [2023-02-18 17:30:07,654 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2023-02-18 17:30:07,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:07,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338438035] [2023-02-18 17:30:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:07,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:07,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697120358] [2023-02-18 17:30:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:07,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:07,690 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) [2023-02-18 17:30:07,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 17:30:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 17:30:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 17:30:07,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338438035] [2023-02-18 17:30:07,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697120358] [2023-02-18 17:30:07,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697120358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:30:07,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:07,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 17:30:07,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452526890] [2023-02-18 17:30:07,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:07,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:30:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:30:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:30:07,822 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-18 17:30:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:07,975 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2023-02-18 17:30:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 17:30:07,975 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2023-02-18 17:30:07,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:07,976 INFO L225 Difference]: With dead ends: 207 [2023-02-18 17:30:07,976 INFO L226 Difference]: Without dead ends: 202 [2023-02-18 17:30:07,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-02-18 17:30:07,977 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 119 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:07,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 290 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:30:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-18 17:30:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2023-02-18 17:30:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-18 17:30:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2023-02-18 17:30:07,999 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2023-02-18 17:30:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:07,999 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2023-02-18 17:30:07,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-18 17:30:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2023-02-18 17:30:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 17:30:08,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:08,000 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 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] [2023-02-18 17:30:08,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:08,205 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 [2023-02-18 17:30:08,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:08,205 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2023-02-18 17:30:08,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:08,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305877261] [2023-02-18 17:30:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:08,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:08,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800248635] [2023-02-18 17:30:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:08,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:08,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:08,213 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) [2023-02-18 17:30:08,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 17:30:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 17:30:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-18 17:30:08,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-18 17:30:08,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305877261] [2023-02-18 17:30:08,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800248635] [2023-02-18 17:30:08,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800248635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:30:08,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:08,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-02-18 17:30:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834699937] [2023-02-18 17:30:08,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 17:30:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 17:30:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:30:08,291 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-18 17:30:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:08,378 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2023-02-18 17:30:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 17:30:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-02-18 17:30:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:08,381 INFO L225 Difference]: With dead ends: 498 [2023-02-18 17:30:08,381 INFO L226 Difference]: Without dead ends: 355 [2023-02-18 17:30:08,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:30:08,382 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:08,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 129 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:30:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-18 17:30:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2023-02-18 17:30:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2023-02-18 17:30:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2023-02-18 17:30:08,429 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2023-02-18 17:30:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:08,430 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2023-02-18 17:30:08,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-18 17:30:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2023-02-18 17:30:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 17:30:08,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:08,431 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 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] [2023-02-18 17:30:08,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:08,636 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 [2023-02-18 17:30:08,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2023-02-18 17:30:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:08,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318978833] [2023-02-18 17:30:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:08,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:08,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:08,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82508872] [2023-02-18 17:30:08,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:30:08,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:08,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:08,662 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) [2023-02-18 17:30:08,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 17:30:08,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:30:08,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:30:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:30:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 17:30:08,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-18 17:30:08,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:08,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318978833] [2023-02-18 17:30:08,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:08,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82508872] [2023-02-18 17:30:08,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82508872] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:30:08,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:08,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2023-02-18 17:30:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263196768] [2023-02-18 17:30:08,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:30:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:30:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:30:08,825 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-02-18 17:30:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:09,007 INFO L93 Difference]: Finished difference Result 467 states and 646 transitions. [2023-02-18 17:30:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 17:30:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) Word has length 87 [2023-02-18 17:30:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:09,009 INFO L225 Difference]: With dead ends: 467 [2023-02-18 17:30:09,009 INFO L226 Difference]: Without dead ends: 348 [2023-02-18 17:30:09,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2023-02-18 17:30:09,010 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:09,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 278 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:30:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-02-18 17:30:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2023-02-18 17:30:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 262 states have (on average 1.2251908396946565) internal successors, (321), 262 states have internal predecessors, (321), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-18 17:30:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 460 transitions. [2023-02-18 17:30:09,045 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 460 transitions. Word has length 87 [2023-02-18 17:30:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:09,045 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 460 transitions. [2023-02-18 17:30:09,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-02-18 17:30:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 460 transitions. [2023-02-18 17:30:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-18 17:30:09,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:09,047 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:09,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-18 17:30:09,251 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 [2023-02-18 17:30:09,251 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2023-02-18 17:30:09,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:09,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670991435] [2023-02-18 17:30:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:09,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:09,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908391216] [2023-02-18 17:30:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:09,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:09,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:09,259 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) [2023-02-18 17:30:09,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 17:30:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:30:09,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 17:30:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:30:09,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-18 17:30:09,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670991435] [2023-02-18 17:30:09,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908391216] [2023-02-18 17:30:09,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908391216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:30:09,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:09,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2023-02-18 17:30:09,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240610671] [2023-02-18 17:30:09,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:09,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 17:30:09,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:09,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 17:30:09,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:30:09,424 INFO L87 Difference]: Start difference. First operand 344 states and 460 transitions. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-02-18 17:30:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:09,599 INFO L93 Difference]: Finished difference Result 453 states and 622 transitions. [2023-02-18 17:30:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 17:30:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 93 [2023-02-18 17:30:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:09,601 INFO L225 Difference]: With dead ends: 453 [2023-02-18 17:30:09,601 INFO L226 Difference]: Without dead ends: 342 [2023-02-18 17:30:09,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2023-02-18 17:30:09,602 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:09,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 216 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:30:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-18 17:30:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2023-02-18 17:30:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 260 states have (on average 1.2) internal successors, (312), 260 states have internal predecessors, (312), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-18 17:30:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 451 transitions. [2023-02-18 17:30:09,635 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 451 transitions. Word has length 93 [2023-02-18 17:30:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:09,635 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 451 transitions. [2023-02-18 17:30:09,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-02-18 17:30:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 451 transitions. [2023-02-18 17:30:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-18 17:30:09,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:09,637 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:09,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:09,841 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 [2023-02-18 17:30:09,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:09,842 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2023-02-18 17:30:09,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:09,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401893633] [2023-02-18 17:30:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:09,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:09,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524077107] [2023-02-18 17:30:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:09,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:09,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:09,853 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) [2023-02-18 17:30:09,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 17:30:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 17:30:09,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 17:30:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 17:30:09,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 17:30:09,986 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 17:30:09,986 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 17:30:10,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 17:30:10,187 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 [2023-02-18 17:30:10,190 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:10,192 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 17:30:10,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 05:30:10 BoogieIcfgContainer [2023-02-18 17:30:10,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 17:30:10,223 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 17:30:10,223 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 17:30:10,223 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 17:30:10,223 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:30:01" (3/4) ... [2023-02-18 17:30:10,224 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 17:30:10,260 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 17:30:10,260 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 17:30:10,260 INFO L158 Benchmark]: Toolchain (without parser) took 9565.81ms. Allocated memory was 117.4MB in the beginning and 163.6MB in the end (delta: 46.1MB). Free memory was 80.9MB in the beginning and 116.8MB in the end (delta: -35.9MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2023-02-18 17:30:10,260 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 117.4MB. Free memory was 86.5MB in the beginning and 86.4MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 17:30:10,260 INFO L158 Benchmark]: CACSL2BoogieTranslator took 139.91ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 70.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 17:30:10,261 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.48ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 68.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 17:30:10,261 INFO L158 Benchmark]: Boogie Preprocessor took 13.92ms. Allocated memory is still 117.4MB. Free memory was 68.4MB in the beginning and 67.5MB in the end (delta: 923.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 17:30:10,261 INFO L158 Benchmark]: RCFGBuilder took 239.33ms. Allocated memory is still 117.4MB. Free memory was 67.1MB in the beginning and 56.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 17:30:10,261 INFO L158 Benchmark]: TraceAbstraction took 9112.13ms. Allocated memory was 117.4MB in the beginning and 163.6MB in the end (delta: 46.1MB). Free memory was 55.9MB in the beginning and 121.0MB in the end (delta: -65.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 17:30:10,261 INFO L158 Benchmark]: Witness Printer took 37.13ms. Allocated memory is still 163.6MB. Free memory was 121.0MB in the beginning and 116.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-18 17:30:10,262 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 117.4MB. Free memory was 86.5MB in the beginning and 86.4MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 139.91ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 70.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.48ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 68.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.92ms. Allocated memory is still 117.4MB. Free memory was 68.4MB in the beginning and 67.5MB in the end (delta: 923.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 239.33ms. Allocated memory is still 117.4MB. Free memory was 67.1MB in the beginning and 56.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9112.13ms. Allocated memory was 117.4MB in the beginning and 163.6MB in the end (delta: 46.1MB). Free memory was 55.9MB in the beginning and 121.0MB in the end (delta: -65.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 37.13ms. Allocated memory is still 163.6MB. Free memory was 121.0MB in the beginning and 116.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=7, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=7, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=7, counter=0, r=-3, R=2, u=5, v=1] [L34] EXPR counter++ VAL [A=7, counter=1, counter++=0, R=2, r=-3, u=5, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=1, R=2, r=-3, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=7, counter=1, r=-3, R=2, u=5, v=1] [L39] EXPR counter++ VAL [A=7, counter=2, counter++=1, r=-3, R=2, u=5, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=2, R=2, r=-3, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [A=7, counter=2, r=-3, R=2, u=5, v=1] [L47] EXPR counter++ VAL [A=7, counter=3, counter++=2, r=-3, R=2, u=5, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=3, r=-3, R=2, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=7, counter=3, r=2, R=2, u=7, v=1] [L47] EXPR counter++ VAL [A=7, counter=4, counter++=3, R=2, r=2, u=7, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=4, R=2, r=2, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [A=7, counter=4, r=2, R=2, u=7, v=1] [L34] EXPR counter++ VAL [A=7, counter=5, counter++=4, r=2, R=2, u=7, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=5, R=2, r=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=7, counter=5, r=2, R=2, u=7, v=1] [L39] EXPR counter++ VAL [A=7, counter=6, counter++=5, r=2, R=2, u=7, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=6, r=2, R=2, u=7, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=7, counter=6, R=2, r=1, u=7, v=3] [L39] EXPR counter++ VAL [A=7, counter=7, counter++=6, r=1, R=2, u=7, v=3] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=7, r=1, R=2, u=7, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=7, counter=7, r=-2, R=2, u=7, v=5] [L39] EXPR counter++ VAL [A=7, counter=8, counter++=7, R=2, r=-2, u=7, v=5] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=8, r=-2, R=2, u=7, v=5] [L41] COND TRUE !(r > 0) VAL [A=7, counter=8, R=2, r=-2, u=7, v=5] [L47] EXPR counter++ VAL [A=7, counter=9, counter++=8, r=-2, R=2, u=7, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=9, r=-2, R=2, u=7, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=7, counter=9, R=2, r=5, u=9, v=5] [L47] EXPR counter++ VAL [A=7, counter=10, counter++=9, R=2, r=5, u=9, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=10, r=5, R=2, u=9, v=5] [L49] COND TRUE !(r < 0) VAL [A=7, counter=10, R=2, r=5, u=9, v=5] [L34] EXPR counter++ VAL [A=7, counter=11, counter++=10, R=2, r=5, u=9, v=5] [L34] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.0s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 542 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 531 mSDsluCounter, 2070 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1508 mSDsCounter, 150 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 840 IncrementalHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 150 mSolverCounterUnsat, 562 mSDtfsCounter, 840 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1072 GetRequests, 934 SyntacticMatches, 21 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=12, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 89 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 693 NumberOfCodeBlocks, 693 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1037 ConstructedInterpolants, 0 QuantifiedInterpolants, 3069 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1619 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 934/1396 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-18 17:30:10,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE