./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/array-fpi/eqn4.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 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-16 23:58:08,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 23:58:08,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 23:58:08,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 23:58:08,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 23:58:08,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 23:58:08,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 23:58:08,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 23:58:08,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 23:58:08,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 23:58:08,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 23:58:09,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 23:58:09,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 23:58:09,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 23:58:09,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 23:58:09,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 23:58:09,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 23:58:09,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 23:58:09,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 23:58:09,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 23:58:09,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 23:58:09,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 23:58:09,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 23:58:09,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 23:58:09,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 23:58:09,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 23:58:09,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 23:58:09,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 23:58:09,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 23:58:09,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 23:58:09,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 23:58:09,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 23:58:09,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 23:58:09,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 23:58:09,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 23:58:09,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 23:58:09,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 23:58:09,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 23:58:09,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 23:58:09,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 23:58:09,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 23:58:09,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 23:58:09,060 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 23:58:09,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 23:58:09,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 23:58:09,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 23:58:09,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 23:58:09,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 23:58:09,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 23:58:09,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 23:58:09,063 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 23:58:09,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 23:58:09,064 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 23:58:09,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 23:58:09,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 23:58:09,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 23:58:09,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 23:58:09,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 23:58:09,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 23:58:09,066 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 23:58:09,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 23:58:09,066 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 23:58:09,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 23:58:09,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 23:58:09,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 23:58:09,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 23:58:09,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:58:09,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 23:58:09,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 23:58:09,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 23:58:09,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 23:58:09,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 23:58:09,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 23:58:09,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 23:58:09,074 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 23:58:09,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 23:58:09,074 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 23:58:09,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a [2023-02-16 23:58:09,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 23:58:09,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 23:58:09,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 23:58:09,310 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 23:58:09,311 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 23:58:09,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4.c [2023-02-16 23:58:10,470 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 23:58:10,628 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 23:58:10,628 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c [2023-02-16 23:58:10,633 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f88aa573e/ee5f95cbaf104d83800276286b1d25ab/FLAG397427844 [2023-02-16 23:58:10,644 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f88aa573e/ee5f95cbaf104d83800276286b1d25ab [2023-02-16 23:58:10,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 23:58:10,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 23:58:10,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 23:58:10,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 23:58:10,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 23:58:10,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f2090d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10, skipping insertion in model container [2023-02-16 23:58:10,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 23:58:10,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 23:58:10,804 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/array-fpi/eqn4.c[587,600] [2023-02-16 23:58:10,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:58:10,829 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 23:58:10,839 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/array-fpi/eqn4.c[587,600] [2023-02-16 23:58:10,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:58:10,857 INFO L208 MainTranslator]: Completed translation [2023-02-16 23:58:10,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10 WrapperNode [2023-02-16 23:58:10,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 23:58:10,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 23:58:10,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 23:58:10,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 23:58:10,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,887 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-16 23:58:10,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 23:58:10,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 23:58:10,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 23:58:10,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 23:58:10,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 23:58:10,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 23:58:10,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 23:58:10,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 23:58:10,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (1/1) ... [2023-02-16 23:58:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:58:10,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:10,943 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) [2023-02-16 23:58:10,954 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 [2023-02-16 23:58:10,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 23:58:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 23:58:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 23:58:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 23:58:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 23:58:10,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 23:58:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 23:58:11,028 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 23:58:11,029 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 23:58:11,148 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 23:58:11,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 23:58:11,154 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 23:58:11,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:58:11 BoogieIcfgContainer [2023-02-16 23:58:11,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 23:58:11,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 23:58:11,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 23:58:11,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 23:58:11,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 11:58:10" (1/3) ... [2023-02-16 23:58:11,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202f2a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:58:11, skipping insertion in model container [2023-02-16 23:58:11,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:58:10" (2/3) ... [2023-02-16 23:58:11,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202f2a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:58:11, skipping insertion in model container [2023-02-16 23:58:11,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:58:11" (3/3) ... [2023-02-16 23:58:11,162 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn4.c [2023-02-16 23:58:11,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 23:58:11,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 23:58:11,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 23:58:11,221 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;@123ccfad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 23:58:11,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 23:58:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 23:58:11,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:58:11,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:58:11,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:58:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:58:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-16 23:58:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:58:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027078321] [2023-02-16 23:58:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:58:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:11,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:58:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027078321] [2023-02-16 23:58:11,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 23:58:11,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697738587] [2023-02-16 23:58:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:11,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:58:11,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:11,413 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) [2023-02-16 23:58:11,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 23:58:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 23:58:11,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:58:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:11,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:58:11,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697738587] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:58:11,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:58:11,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 23:58:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193840501] [2023-02-16 23:58:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:58:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 23:58:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:58:11,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 23:58:11,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:58:11,627 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:58:11,639 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-16 23:58:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 23:58:11,641 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 23:58:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:58:11,646 INFO L225 Difference]: With dead ends: 38 [2023-02-16 23:58:11,646 INFO L226 Difference]: Without dead ends: 17 [2023-02-16 23:58:11,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:58:11,650 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2023-02-16 23:58:11,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:58:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-16 23:58:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-16 23:58:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-16 23:58:11,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-16 23:58:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:58:11,676 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-16 23:58:11,676 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-16 23:58:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 23:58:11,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:58:11,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:58:11,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 23:58:11,883 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 [2023-02-16 23:58:11,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:58:11,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:58:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-16 23:58:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:58:11,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616532974] [2023-02-16 23:58:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:11,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:58:11,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:58:11,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081351296] [2023-02-16 23:58:11,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:11,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:58:11,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:11,911 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) [2023-02-16 23:58:11,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 23:58:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 23:58:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:58:12,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:58:12,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 100 [2023-02-16 23:58:12,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-02-16 23:58:12,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-02-16 23:58:12,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2023-02-16 23:58:12,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-16 23:58:12,140 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:12,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:58:12,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-16 23:58:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:12,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:58:12,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:58:12,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616532974] [2023-02-16 23:58:12,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:58:12,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081351296] [2023-02-16 23:58:12,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081351296] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:58:12,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:58:12,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 23:58:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897446456] [2023-02-16 23:58:12,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:58:12,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 23:58:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:58:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 23:58:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:58:12,209 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:58:12,274 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-16 23:58:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 23:58:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 23:58:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:58:12,278 INFO L225 Difference]: With dead ends: 34 [2023-02-16 23:58:12,278 INFO L226 Difference]: Without dead ends: 32 [2023-02-16 23:58:12,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:58:12,284 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:58:12,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:58:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-16 23:58:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-16 23:58:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-16 23:58:12,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2023-02-16 23:58:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:58:12,293 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-16 23:58:12,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-16 23:58:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 23:58:12,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:58:12,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:58:12,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 23:58:12,500 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 [2023-02-16 23:58:12,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:58:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:58:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2023-02-16 23:58:12,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:58:12,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374437329] [2023-02-16 23:58:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:12,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:58:12,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:58:12,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765017369] [2023-02-16 23:58:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:12,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:58:12,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:12,549 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) [2023-02-16 23:58:12,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 23:58:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:58:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:58:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:12,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:58:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:58:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374437329] [2023-02-16 23:58:12,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:58:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765017369] [2023-02-16 23:58:12,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765017369] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:58:12,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:58:12,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 23:58:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259254668] [2023-02-16 23:58:12,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:58:12,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 23:58:12,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:58:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 23:58:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:58:12,643 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:58:12,718 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-02-16 23:58:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 23:58:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 23:58:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:58:12,720 INFO L225 Difference]: With dead ends: 49 [2023-02-16 23:58:12,720 INFO L226 Difference]: Without dead ends: 40 [2023-02-16 23:58:12,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:58:12,725 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:58:12,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:58:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-16 23:58:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-02-16 23:58:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-16 23:58:12,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-16 23:58:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:58:12,737 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-16 23:58:12,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-16 23:58:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 23:58:12,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:58:12,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:58:12,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 23:58:12,944 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 [2023-02-16 23:58:12,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:58:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:58:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2023-02-16 23:58:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:58:12,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249771061] [2023-02-16 23:58:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:58:12,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:58:12,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984284503] [2023-02-16 23:58:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:12,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:58:12,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:12,971 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) [2023-02-16 23:58:12,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 23:58:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:13,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:58:13,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:58:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:58:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:13,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:58:13,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249771061] [2023-02-16 23:58:13,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:58:13,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984284503] [2023-02-16 23:58:13,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984284503] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:58:13,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:58:13,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-02-16 23:58:13,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117466639] [2023-02-16 23:58:13,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:58:13,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 23:58:13,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:58:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 23:58:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 23:58:13,055 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:58:13,112 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-16 23:58:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 23:58:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 23:58:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:58:13,113 INFO L225 Difference]: With dead ends: 44 [2023-02-16 23:58:13,113 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 23:58:13,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-16 23:58:13,114 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:58:13,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:58:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 23:58:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-02-16 23:58:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-16 23:58:13,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-02-16 23:58:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:58:13,119 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-16 23:58:13,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-16 23:58:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 23:58:13,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:58:13,120 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:58:13,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 23:58:13,326 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 [2023-02-16 23:58:13,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:58:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:58:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2023-02-16 23:58:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:58:13,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253482532] [2023-02-16 23:58:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:13,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:58:13,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:58:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550237874] [2023-02-16 23:58:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:58:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:13,350 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) [2023-02-16 23:58:13,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 23:58:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:13,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 23:58:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:58:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:13,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:58:13,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:58:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253482532] [2023-02-16 23:58:13,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:58:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550237874] [2023-02-16 23:58:13,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550237874] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:58:13,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:58:13,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 23:58:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146477690] [2023-02-16 23:58:13,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:58:13,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 23:58:13,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:58:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 23:58:13,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-16 23:58:13,433 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:58:13,479 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-02-16 23:58:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 23:58:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-16 23:58:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:58:13,481 INFO L225 Difference]: With dead ends: 41 [2023-02-16 23:58:13,481 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 23:58:13,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:58:13,482 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:58:13,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:58:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 23:58:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-16 23:58:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-16 23:58:13,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2023-02-16 23:58:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:58:13,486 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-16 23:58:13,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-16 23:58:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 23:58:13,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:58:13,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:58:13,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 23:58:13,692 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 [2023-02-16 23:58:13,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:58:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:58:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-16 23:58:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:58:13,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935645463] [2023-02-16 23:58:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:58:13,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:58:13,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116496128] [2023-02-16 23:58:13,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:58:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:13,716 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) [2023-02-16 23:58:13,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 23:58:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 23:58:13,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:58:13,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 23:58:13,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:13,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-16 23:58:13,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 23:58:13,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 23:58:13,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2023-02-16 23:58:13,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 87 [2023-02-16 23:58:13,845 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:13,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:58:13,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-16 23:58:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:13,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:58:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:58:13,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:58:13,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935645463] [2023-02-16 23:58:13,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:58:13,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116496128] [2023-02-16 23:58:13,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116496128] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:58:13,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:58:13,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-02-16 23:58:13,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198472296] [2023-02-16 23:58:13,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:58:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 23:58:13,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:58:13,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 23:58:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-16 23:58:13,941 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:58:14,121 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-16 23:58:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 23:58:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-16 23:58:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:58:14,123 INFO L225 Difference]: With dead ends: 54 [2023-02-16 23:58:14,123 INFO L226 Difference]: Without dead ends: 52 [2023-02-16 23:58:14,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-02-16 23:58:14,124 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:58:14,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 59 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:58:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-16 23:58:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2023-02-16 23:58:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-16 23:58:14,130 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2023-02-16 23:58:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:58:14,130 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-16 23:58:14,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:58:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-16 23:58:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 23:58:14,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:58:14,131 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:58:14,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 23:58:14,332 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 [2023-02-16 23:58:14,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:58:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:58:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2023-02-16 23:58:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:58:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586977317] [2023-02-16 23:58:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:14,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:58:14,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:58:14,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877272666] [2023-02-16 23:58:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:58:14,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:58:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:58:14,366 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) [2023-02-16 23:58:14,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 23:58:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:58:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-16 23:58:14,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:58:14,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:58:14,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 67 [2023-02-16 23:58:14,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2023-02-16 23:58:14,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:58:14,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 111 [2023-02-16 23:58:14,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-02-16 23:58:14,502 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 181 [2023-02-16 23:58:14,530 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:58:14,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2023-02-16 23:58:14,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 38 [2023-02-16 23:58:14,540 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,543 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:58:14,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2023-02-16 23:58:14,558 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-16 23:58:14,569 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,570 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 23:58:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:14,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 485 treesize of output 377 [2023-02-16 23:58:14,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 374 treesize of output 372 [2023-02-16 23:58:14,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 372 treesize of output 370 [2023-02-16 23:58:14,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 370 treesize of output 368 [2023-02-16 23:58:14,666 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,668 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,670 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,671 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,674 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,676 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,677 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,678 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:14,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 102 [2023-02-16 23:58:14,707 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,711 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,724 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:14,727 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:15,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 541 treesize of output 425 [2023-02-16 23:58:15,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 400 [2023-02-16 23:58:15,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 400 treesize of output 398 [2023-02-16 23:58:15,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 398 treesize of output 396 [2023-02-16 23:58:15,093 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:58:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:15,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 370 [2023-02-16 23:58:15,151 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,170 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:58:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:58:15,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:58:15,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 503 [2023-02-16 23:58:15,353 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,357 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,360 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,363 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,368 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:15,372 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 23:58:17,347 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:58:17,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 5510 treesize of output 5388 [2023-02-16 23:58:17,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-02-17 00:01:11,442 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:12,960 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:13,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:13,218 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:13,263 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:16,603 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:17,209 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:17,465 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:17,978 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:20,574 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:21,083 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:21,299 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:21,923 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:23,174 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:23,922 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:24,592 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:25,306 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:25,891 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:26,559 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:28,247 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:28,806 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:28,997 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:29,432 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:31,785 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:32,242 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:32,447 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:33,021 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:34,231 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:34,984 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:35,670 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:36,398 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:36,997 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:37,784 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:38,530 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:39,315 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:40,534 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:41,280 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:41,866 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:42,421 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:43,217 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:44,256 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:46,369 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:46,701 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:47,921 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:49,981 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:50,279 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:51,552 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:52,410 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:57,498 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:57,545 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:57,706 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:57,758 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:57,978 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,034 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,204 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,250 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,460 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,513 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,672 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,724 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,937 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:58,989 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:59,148 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:01:59,208 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:05,520 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:41,387 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:41,554 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:41,670 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:41,767 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:41,904 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:42,090 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:42,225 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:42,317 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:44,269 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:45,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:45,665 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 00:02:46,211 WARN L207 Elim1Store]: Array PQE input equivalent to false