./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.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 9692f5b55a240b01d2d0c222255869fb052ffe02a605ab1c8e72ef46a070f8cd --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:03:38,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:03:38,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:03:38,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:03:38,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:03:38,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:03:38,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:03:38,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:03:38,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:03:38,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:03:38,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:03:38,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:03:38,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:03:38,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:03:38,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:03:38,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:03:38,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:03:38,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:03:38,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:03:38,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:03:38,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:03:38,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:03:38,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:03:38,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:03:38,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:03:38,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:03:38,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:03:38,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:03:38,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:03:38,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:03:38,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:03:38,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:03:38,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:03:38,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:03:38,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:03:38,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:03:38,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:03:38,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:03:38,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:03:38,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:03:38,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:03:38,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:03:38,945 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:03:38,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:03:38,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:03:38,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:03:38,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:03:38,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:03:38,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:03:38,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:03:38,954 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:03:38,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:03:38,955 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:03:38,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:03:38,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:03:38,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:03:38,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:03:38,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:03:38,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:03:38,957 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:03:38,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:03:38,957 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:03:38,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:03:38,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:03:38,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:03:38,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:03:38,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:03:38,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:03:38,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:03:38,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:03:38,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:03:38,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:03:38,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:03:38,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:03:38,960 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:03:38,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:03:38,960 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:03:38,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9692f5b55a240b01d2d0c222255869fb052ffe02a605ab1c8e72ef46a070f8cd [2023-02-15 21:03:39,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:03:39,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:03:39,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:03:39,222 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:03:39,222 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:03:39,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c [2023-02-15 21:03:40,393 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:03:40,583 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:03:40,584 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c [2023-02-15 21:03:40,589 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1696d5d4c/aad250c55b34499eab902b807e81dd89/FLAGf1415e09f [2023-02-15 21:03:40,602 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1696d5d4c/aad250c55b34499eab902b807e81dd89 [2023-02-15 21:03:40,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:03:40,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:03:40,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:03:40,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:03:40,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:03:40,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635054f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40, skipping insertion in model container [2023-02-15 21:03:40,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:03:40,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:03:40,738 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c[537,550] [2023-02-15 21:03:40,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:03:40,777 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:03:40,789 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c[537,550] [2023-02-15 21:03:40,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:03:40,816 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:03:40,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40 WrapperNode [2023-02-15 21:03:40,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:03:40,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:03:40,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:03:40,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:03:40,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,854 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-15 21:03:40,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:03:40,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:03:40,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:03:40,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:03:40,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,886 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:03:40,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:03:40,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:03:40,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:03:40,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (1/1) ... [2023-02-15 21:03:40,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:03:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:40,920 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) [2023-02-15 21:03:40,924 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 [2023-02-15 21:03:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:03:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:03:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:03:40,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:03:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 21:03:40,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 21:03:41,013 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:03:41,015 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:03:41,129 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:03:41,137 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:03:41,138 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 21:03:41,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:03:41 BoogieIcfgContainer [2023-02-15 21:03:41,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:03:41,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:03:41,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:03:41,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:03:41,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:03:40" (1/3) ... [2023-02-15 21:03:41,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6975a01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:03:41, skipping insertion in model container [2023-02-15 21:03:41,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:03:40" (2/3) ... [2023-02-15 21:03:41,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6975a01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:03:41, skipping insertion in model container [2023-02-15 21:03:41,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:03:41" (3/3) ... [2023-02-15 21:03:41,147 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound50.c [2023-02-15 21:03:41,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:03:41,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:03:41,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:03:41,199 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;@8d1f4d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:03:41,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:03:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:03:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:03:41,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:41,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:41,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2023-02-15 21:03:41,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203907136] [2023-02-15 21:03:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:41,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:41,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203907136] [2023-02-15 21:03:41,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:03:41,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669647175] [2023-02-15 21:03:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:41,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:41,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:41,313 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) [2023-02-15 21:03:41,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:03:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 21:03:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:03:41,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:03:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669647175] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:03:41,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:03:41,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:03:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781338316] [2023-02-15 21:03:41,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:03:41,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 21:03:41,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 21:03:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:03:41,513 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:03:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:41,540 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2023-02-15 21:03:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 21:03:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 21:03:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:41,550 INFO L225 Difference]: With dead ends: 53 [2023-02-15 21:03:41,550 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 21:03:41,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:03:41,558 INFO L413 NwaCegarLoop]: 38 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, 38 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 [2023-02-15 21:03:41,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:03:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 21:03:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 21:03:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:03:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-02-15 21:03:41,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2023-02-15 21:03:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:41,602 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-02-15 21:03:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:03:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-02-15 21:03:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:03:41,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:41,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:41,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 21:03:41,804 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 [2023-02-15 21:03:41,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2023-02-15 21:03:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:41,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221231403] [2023-02-15 21:03:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:03:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:42,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221231403] [2023-02-15 21:03:42,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221231403] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:03:42,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:03:42,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:03:42,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213511512] [2023-02-15 21:03:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:03:42,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:03:42,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:03:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:03:42,049 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:03:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:42,094 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-02-15 21:03:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:03:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 21:03:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:42,096 INFO L225 Difference]: With dead ends: 38 [2023-02-15 21:03:42,096 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 21:03:42,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:03:42,098 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:42,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:03:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 21:03:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-02-15 21:03:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:03:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 21:03:42,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-15 21:03:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:42,112 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 21:03:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:03:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 21:03:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 21:03:42,114 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:42,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:03:42,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2023-02-15 21:03:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:42,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882891772] [2023-02-15 21:03:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:42,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:42,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882891772] [2023-02-15 21:03:42,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:03:42,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990650753] [2023-02-15 21:03:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:42,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:42,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:42,149 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) [2023-02-15 21:03:42,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:03:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 21:03:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:03:42,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:03:42,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990650753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:03:42,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:03:42,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:03:42,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775300142] [2023-02-15 21:03:42,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:03:42,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:03:42,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:42,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:03:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:03:42,260 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:03:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:42,288 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-02-15 21:03:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:03:42,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 21:03:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:42,291 INFO L225 Difference]: With dead ends: 44 [2023-02-15 21:03:42,291 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 21:03:42,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:03:42,294 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:42,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:03:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 21:03:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 21:03:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:03:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 21:03:42,303 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2023-02-15 21:03:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:42,303 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 21:03:42,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:03:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 21:03:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 21:03:42,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:42,305 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:42,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:03:42,510 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,SelfDestructingSolverStorable2 [2023-02-15 21:03:42,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2023-02-15 21:03:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906458967] [2023-02-15 21:03:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:42,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:03:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:03:42,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:42,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906458967] [2023-02-15 21:03:42,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906458967] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:03:42,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:03:42,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:03:42,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171895800] [2023-02-15 21:03:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:03:42,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:03:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:03:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:03:42,760 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:03:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:42,822 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-02-15 21:03:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:03:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 21:03:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:42,824 INFO L225 Difference]: With dead ends: 44 [2023-02-15 21:03:42,826 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 21:03:42,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:03:42,828 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:42,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:03:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 21:03:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-15 21:03:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:03:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-15 21:03:42,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-02-15 21:03:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:42,839 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-15 21:03:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:03:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-15 21:03:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:03:42,841 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:42,841 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:42,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:03:42,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2023-02-15 21:03:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:42,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482414627] [2023-02-15 21:03:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:42,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:03:42,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548487882] [2023-02-15 21:03:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:42,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:42,861 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) [2023-02-15 21:03:42,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:03:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:42,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:03:42,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:03:43,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:03:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:03:44,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:44,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482414627] [2023-02-15 21:03:44,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:03:44,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548487882] [2023-02-15 21:03:44,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548487882] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:03:44,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:03:44,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 21:03:44,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658683668] [2023-02-15 21:03:44,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:03:44,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:03:44,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:03:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:03:44,919 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:03:46,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:48,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:53,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:55,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:57,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:59,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:59,720 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2023-02-15 21:03:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:03:59,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-02-15 21:03:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:59,723 INFO L225 Difference]: With dead ends: 78 [2023-02-15 21:03:59,723 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 21:03:59,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:03:59,724 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 81 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:59,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 86 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 177 Invalid, 6 Unknown, 0 Unchecked, 14.5s Time] [2023-02-15 21:03:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 21:03:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-02-15 21:03:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 21:03:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-02-15 21:03:59,736 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 20 [2023-02-15 21:03:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:59,736 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-02-15 21:03:59,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:03:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-02-15 21:03:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:03:59,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:59,737 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:59,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:03:59,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:59,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2023-02-15 21:03:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:59,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263770823] [2023-02-15 21:03:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:59,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:03:59,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031099777] [2023-02-15 21:03:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:59,949 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) [2023-02-15 21:03:59,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:03:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:59,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 21:03:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:04:00,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:04:00,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:00,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263770823] [2023-02-15 21:04:00,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:00,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031099777] [2023-02-15 21:04:00,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031099777] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:04:00,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:04:00,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:04:00,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699088683] [2023-02-15 21:04:00,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:04:00,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:04:00,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:04:00,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:04:00,028 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:04:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:00,055 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2023-02-15 21:04:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:04:00,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 21:04:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:00,056 INFO L225 Difference]: With dead ends: 76 [2023-02-15 21:04:00,056 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 21:04:00,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:04:00,057 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:00,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:04:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 21:04:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-15 21:04:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 21:04:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2023-02-15 21:04:00,070 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 28 [2023-02-15 21:04:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:00,070 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2023-02-15 21:04:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:04:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2023-02-15 21:04:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:04:00,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:00,072 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:00,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 21:04:00,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:00,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:00,278 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2023-02-15 21:04:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425864794] [2023-02-15 21:04:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:00,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:00,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:00,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818917166] [2023-02-15 21:04:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:00,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:00,286 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) [2023-02-15 21:04:00,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:04:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 21:04:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:04:00,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:04:00,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:00,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425864794] [2023-02-15 21:04:00,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:00,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818917166] [2023-02-15 21:04:00,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818917166] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:04:00,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:04:00,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:04:00,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779117728] [2023-02-15 21:04:00,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:04:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:04:00,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:00,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:04:00,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:04:00,527 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:04:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:01,200 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-02-15 21:04:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:04:01,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 21:04:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:01,201 INFO L225 Difference]: With dead ends: 75 [2023-02-15 21:04:01,201 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 21:04:01,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:04:01,202 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:01,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 107 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:04:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 21:04:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-15 21:04:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 21:04:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2023-02-15 21:04:01,219 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 28 [2023-02-15 21:04:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:01,219 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2023-02-15 21:04:01,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:04:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2023-02-15 21:04:01,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 21:04:01,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:01,221 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:01,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:04:01,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:01,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2023-02-15 21:04:01,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:01,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102474776] [2023-02-15 21:04:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:01,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:01,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:01,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179872572] [2023-02-15 21:04:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:01,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:01,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:01,437 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) [2023-02-15 21:04:01,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:04:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 21:04:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:04:01,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:04:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102474776] [2023-02-15 21:04:01,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179872572] [2023-02-15 21:04:01,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179872572] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:04:01,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:04:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 21:04:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361777006] [2023-02-15 21:04:01,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:04:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:04:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:04:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:04:01,551 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 21:04:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:01,642 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2023-02-15 21:04:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:04:01,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-02-15 21:04:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:01,645 INFO L225 Difference]: With dead ends: 134 [2023-02-15 21:04:01,645 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 21:04:01,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:04:01,649 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:01,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 155 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:04:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 21:04:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2023-02-15 21:04:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 73 states have internal predecessors, (82), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-15 21:04:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2023-02-15 21:04:01,677 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 30 [2023-02-15 21:04:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:01,679 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2023-02-15 21:04:01,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 21:04:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2023-02-15 21:04:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 21:04:01,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:01,685 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:01,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 21:04:01,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:01,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:01,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2101649637, now seen corresponding path program 1 times [2023-02-15 21:04:01,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:01,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794138662] [2023-02-15 21:04:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:01,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:01,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:01,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955657115] [2023-02-15 21:04:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:01,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:01,898 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) [2023-02-15 21:04:01,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:04:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 21:04:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 21:04:02,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 21:04:02,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:02,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794138662] [2023-02-15 21:04:02,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:02,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955657115] [2023-02-15 21:04:02,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955657115] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:04:02,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:04:02,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 21:04:02,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173280050] [2023-02-15 21:04:02,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:04:02,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:04:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:04:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:04:02,083 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 21:04:02,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:02,238 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2023-02-15 21:04:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:04:02,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-15 21:04:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:02,241 INFO L225 Difference]: With dead ends: 199 [2023-02-15 21:04:02,241 INFO L226 Difference]: Without dead ends: 185 [2023-02-15 21:04:02,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:04:02,241 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 71 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:02,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 264 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:04:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-15 21:04:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2023-02-15 21:04:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 115 states have (on average 1.182608695652174) internal successors, (136), 122 states have internal predecessors, (136), 40 states have call successors, (40), 22 states have call predecessors, (40), 22 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-15 21:04:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 212 transitions. [2023-02-15 21:04:02,277 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 212 transitions. Word has length 46 [2023-02-15 21:04:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:02,277 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 212 transitions. [2023-02-15 21:04:02,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 21:04:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 212 transitions. [2023-02-15 21:04:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 21:04:02,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:02,278 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:02,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 21:04:02,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:02,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2103377515, now seen corresponding path program 1 times [2023-02-15 21:04:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323279721] [2023-02-15 21:04:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:02,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:02,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820842841] [2023-02-15 21:04:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:02,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:02,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:02,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:04:02,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:04:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 21:04:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:04:02,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:04:04,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323279721] [2023-02-15 21:04:04,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820842841] [2023-02-15 21:04:04,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820842841] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:04:04,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:04:04,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2023-02-15 21:04:04,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989701205] [2023-02-15 21:04:04,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:04:04,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:04:04,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:04:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:04:04,322 INFO L87 Difference]: Start difference. First operand 178 states and 212 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-15 21:04:06,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:09,119 INFO L93 Difference]: Finished difference Result 232 states and 285 transitions. [2023-02-15 21:04:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:04:09,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2023-02-15 21:04:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:09,122 INFO L225 Difference]: With dead ends: 232 [2023-02-15 21:04:09,122 INFO L226 Difference]: Without dead ends: 230 [2023-02-15 21:04:09,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:04:09,123 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:09,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 137 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-02-15 21:04:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-15 21:04:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2023-02-15 21:04:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 159 states have internal predecessors, (176), 51 states have call successors, (51), 26 states have call predecessors, (51), 26 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-15 21:04:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 274 transitions. [2023-02-15 21:04:09,152 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 274 transitions. Word has length 46 [2023-02-15 21:04:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:09,152 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 274 transitions. [2023-02-15 21:04:09,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-15 21:04:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 274 transitions. [2023-02-15 21:04:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 21:04:09,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:09,154 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:09,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 21:04:09,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 21:04:09,359 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:09,359 INFO L85 PathProgramCache]: Analyzing trace with hash -246714477, now seen corresponding path program 1 times [2023-02-15 21:04:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:09,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097763820] [2023-02-15 21:04:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:09,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:09,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377777282] [2023-02-15 21:04:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:09,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:09,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:04:09,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 21:04:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:09,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 21:04:09,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 21:04:09,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-02-15 21:04:10,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:10,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097763820] [2023-02-15 21:04:10,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:10,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377777282] [2023-02-15 21:04:10,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377777282] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:04:10,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:04:10,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 21:04:10,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221491053] [2023-02-15 21:04:10,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:04:10,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:04:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:04:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:04:10,161 INFO L87 Difference]: Start difference. First operand 225 states and 274 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-15 21:04:12,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:15,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:18,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:20,783 INFO L93 Difference]: Finished difference Result 276 states and 334 transitions. [2023-02-15 21:04:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:04:20,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 56 [2023-02-15 21:04:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:20,786 INFO L225 Difference]: With dead ends: 276 [2023-02-15 21:04:20,786 INFO L226 Difference]: Without dead ends: 254 [2023-02-15 21:04:20,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:04:20,787 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:20,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 248 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 491 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2023-02-15 21:04:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-02-15 21:04:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 242. [2023-02-15 21:04:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 161 states have (on average 1.173913043478261) internal successors, (189), 172 states have internal predecessors, (189), 51 states have call successors, (51), 29 states have call predecessors, (51), 29 states have return successors, (48), 40 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-15 21:04:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2023-02-15 21:04:20,816 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 56 [2023-02-15 21:04:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:20,816 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2023-02-15 21:04:20,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-15 21:04:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2023-02-15 21:04:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 21:04:20,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:20,817 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:20,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 21:04:21,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:21,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2023-02-15 21:04:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:21,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226956769] [2023-02-15 21:04:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:21,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:21,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:21,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435354180] [2023-02-15 21:04:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:21,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:21,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:21,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:04:21,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 21:04:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:21,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 21:04:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 21:04:22,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:50,168 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (or (not (= .cse0 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (= (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 (div .cse0 2)) |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~B~0#1| (div .cse1 2))) 4294967296)) (= 1 .cse1) (<= .cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)))) is different from true [2023-02-15 21:06:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 6 not checked. [2023-02-15 21:06:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226956769] [2023-02-15 21:06:33,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435354180] [2023-02-15 21:06:33,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435354180] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:33,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:33,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-02-15 21:06:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145463468] [2023-02-15 21:06:33,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:33,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 21:06:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 21:06:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=337, Unknown=10, NotChecked=38, Total=462 [2023-02-15 21:06:33,709 INFO L87 Difference]: Start difference. First operand 242 states and 288 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-15 21:06:35,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:44,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:46,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:54,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:56,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:01,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:03,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:05,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:36,672 WARN L233 SmtUtils]: Spent 23.80s on a formula simplification. DAG size of input: 47 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:07:39,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:41,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:44,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:50,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:52,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:54,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []