./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 21:23:16,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 21:23:16,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 21:23:16,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 21:23:16,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 21:23:16,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 21:23:16,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 21:23:16,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 21:23:16,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 21:23:16,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 21:23:16,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 21:23:16,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 21:23:16,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 21:23:16,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 21:23:16,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 21:23:16,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 21:23:16,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 21:23:16,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 21:23:16,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 21:23:16,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 21:23:16,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 21:23:16,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 21:23:16,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 21:23:16,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 21:23:16,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 21:23:16,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 21:23:16,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 21:23:16,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 21:23:16,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 21:23:16,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 21:23:16,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 21:23:16,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 21:23:16,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 21:23:16,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 21:23:16,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 21:23:16,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 21:23:16,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 21:23:16,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 21:23:16,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 21:23:16,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 21:23:16,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 21:23:16,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 21:23:16,974 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 21:23:16,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 21:23:16,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 21:23:16,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 21:23:16,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 21:23:16,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 21:23:16,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 21:23:16,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 21:23:16,980 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 21:23:16,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 21:23:16,981 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 21:23:16,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 21:23:16,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 21:23:16,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 21:23:16,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 21:23:16,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 21:23:16,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 21:23:16,983 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 21:23:16,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 21:23:16,983 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 21:23:16,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 21:23:16,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 21:23:16,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 21:23:16,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 21:23:16,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:23:16,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 21:23:16,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 21:23:16,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 21:23:16,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 21:23:16,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 21:23:16,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 21:23:16,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 21:23:16,986 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 21:23:16,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 21:23:16,986 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 21:23:16,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2023-02-14 21:23:17,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 21:23:17,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 21:23:17,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 21:23:17,283 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 21:23:17,283 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 21:23:17,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-02-14 21:23:18,355 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 21:23:18,549 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 21:23:18,549 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-02-14 21:23:18,555 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85382b1e/75cddc32fbb64ed98bba40faf907ebc3/FLAG39fb8aa83 [2023-02-14 21:23:18,566 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85382b1e/75cddc32fbb64ed98bba40faf907ebc3 [2023-02-14 21:23:18,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 21:23:18,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 21:23:18,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 21:23:18,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 21:23:18,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 21:23:18,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c67e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18, skipping insertion in model container [2023-02-14 21:23:18,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 21:23:18,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 21:23:18,745 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2023-02-14 21:23:18,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:23:18,775 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 21:23:18,790 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2023-02-14 21:23:18,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:23:18,820 INFO L208 MainTranslator]: Completed translation [2023-02-14 21:23:18,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18 WrapperNode [2023-02-14 21:23:18,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 21:23:18,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 21:23:18,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 21:23:18,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 21:23:18,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,856 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-02-14 21:23:18,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 21:23:18,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 21:23:18,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 21:23:18,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 21:23:18,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,896 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 21:23:18,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 21:23:18,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 21:23:18,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 21:23:18,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (1/1) ... [2023-02-14 21:23:18,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:23:18,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:18,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 21:23:18,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 21:23:18,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 21:23:18,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 21:23:18,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 21:23:18,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 21:23:18,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 21:23:18,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 21:23:18,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 21:23:18,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 21:23:19,040 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 21:23:19,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 21:23:19,228 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 21:23:19,233 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 21:23:19,234 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-14 21:23:19,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:23:19 BoogieIcfgContainer [2023-02-14 21:23:19,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 21:23:19,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 21:23:19,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 21:23:19,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 21:23:19,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:23:18" (1/3) ... [2023-02-14 21:23:19,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4009d333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:23:19, skipping insertion in model container [2023-02-14 21:23:19,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:18" (2/3) ... [2023-02-14 21:23:19,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4009d333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:23:19, skipping insertion in model container [2023-02-14 21:23:19,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:23:19" (3/3) ... [2023-02-14 21:23:19,242 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2023-02-14 21:23:19,260 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 21:23:19,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 21:23:19,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 21:23:19,311 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;@4cac64e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 21:23:19,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 21:23:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 21:23:19,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:19,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:19,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash -700880873, now seen corresponding path program 1 times [2023-02-14 21:23:19,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:19,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354291159] [2023-02-14 21:23:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:19,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:23:19,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:19,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354291159] [2023-02-14 21:23:19,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354291159] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:23:19,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:23:19,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 21:23:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153952224] [2023-02-14 21:23:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:23:19,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:23:19,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:23:19,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:23:19,608 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:19,639 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2023-02-14 21:23:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:23:19,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-14 21:23:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:19,650 INFO L225 Difference]: With dead ends: 42 [2023-02-14 21:23:19,651 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 21:23:19,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:23:19,662 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:19,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 21:23:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-02-14 21:23:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-14 21:23:19,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-14 21:23:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:19,689 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-14 21:23:19,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-14 21:23:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 21:23:19,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:19,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:19,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 21:23:19,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1756124227, now seen corresponding path program 1 times [2023-02-14 21:23:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634882814] [2023-02-14 21:23:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:23:19,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634882814] [2023-02-14 21:23:19,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634882814] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:23:19,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:23:19,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 21:23:19,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442561103] [2023-02-14 21:23:19,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:23:19,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:23:19,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:23:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:23:19,773 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:19,798 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-02-14 21:23:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:23:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 21:23:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:19,799 INFO L225 Difference]: With dead ends: 36 [2023-02-14 21:23:19,799 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 21:23:19,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:23:19,801 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:19,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 21:23:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-02-14 21:23:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-02-14 21:23:19,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-02-14 21:23:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:19,808 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-02-14 21:23:19,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-02-14 21:23:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 21:23:19,809 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:19,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 21:23:19,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1655857333, now seen corresponding path program 1 times [2023-02-14 21:23:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:19,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584674932] [2023-02-14 21:23:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:19,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:19,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584674932] [2023-02-14 21:23:19,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584674932] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:19,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331516573] [2023-02-14 21:23:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:19,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:19,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:19,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:19,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 21:23:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:19,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 21:23:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:20,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:20,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331516573] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:20,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:20,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 21:23:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689426021] [2023-02-14 21:23:20,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:20,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 21:23:20,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 21:23:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:23:20,075 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:20,107 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-14 21:23:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 21:23:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-14 21:23:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:20,109 INFO L225 Difference]: With dead ends: 43 [2023-02-14 21:23:20,109 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 21:23:20,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:23:20,111 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:20,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 21:23:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-14 21:23:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-14 21:23:20,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2023-02-14 21:23:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:20,124 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-14 21:23:20,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-14 21:23:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 21:23:20,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:20,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:20,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 21:23:20,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:20,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:20,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1161822033, now seen corresponding path program 2 times [2023-02-14 21:23:20,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:20,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611333187] [2023-02-14 21:23:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 21:23:20,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611333187] [2023-02-14 21:23:20,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611333187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506375528] [2023-02-14 21:23:20,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:23:20,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:20,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:20,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:20,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 21:23:20,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:23:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:23:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:20,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:20,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506375528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:20,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:20,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-14 21:23:20,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767260244] [2023-02-14 21:23:20,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:20,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 21:23:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 21:23:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-14 21:23:20,618 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:20,756 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2023-02-14 21:23:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 21:23:20,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-14 21:23:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:20,758 INFO L225 Difference]: With dead ends: 65 [2023-02-14 21:23:20,758 INFO L226 Difference]: Without dead ends: 49 [2023-02-14 21:23:20,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-02-14 21:23:20,759 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:20,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-14 21:23:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-02-14 21:23:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-02-14 21:23:20,766 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2023-02-14 21:23:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:20,766 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-02-14 21:23:20,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-02-14 21:23:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 21:23:20,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:20,768 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:20,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:20,973 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,SelfDestructingSolverStorable3 [2023-02-14 21:23:20,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash 194818197, now seen corresponding path program 3 times [2023-02-14 21:23:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859667450] [2023-02-14 21:23:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:20,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 21:23:21,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859667450] [2023-02-14 21:23:21,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859667450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:21,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942934260] [2023-02-14 21:23:21,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:23:21,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:21,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:21,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 21:23:21,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 21:23:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 21:23:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-14 21:23:21,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-14 21:23:21,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942934260] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:21,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:21,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-14 21:23:21,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238023917] [2023-02-14 21:23:21,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:21,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 21:23:21,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 21:23:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-14 21:23:21,408 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:21,608 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2023-02-14 21:23:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 21:23:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-14 21:23:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:21,610 INFO L225 Difference]: With dead ends: 94 [2023-02-14 21:23:21,610 INFO L226 Difference]: Without dead ends: 72 [2023-02-14 21:23:21,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2023-02-14 21:23:21,611 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:21,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 85 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:23:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-14 21:23:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2023-02-14 21:23:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2023-02-14 21:23:21,619 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 42 [2023-02-14 21:23:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:21,619 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2023-02-14 21:23:21,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2023-02-14 21:23:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 21:23:21,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:21,621 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:21,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:21,827 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 [2023-02-14 21:23:21,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash 515904919, now seen corresponding path program 4 times [2023-02-14 21:23:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:21,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117112515] [2023-02-14 21:23:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:21,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 21:23:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:22,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117112515] [2023-02-14 21:23:22,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117112515] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:22,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625188769] [2023-02-14 21:23:22,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:23:22,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:22,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:22,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:22,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 21:23:22,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:23:22,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 21:23:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 21:23:22,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 21:23:22,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625188769] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:22,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:22,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-14 21:23:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809520962] [2023-02-14 21:23:22,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:22,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 21:23:22,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 21:23:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-14 21:23:22,501 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:22,574 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2023-02-14 21:23:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 21:23:22,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-02-14 21:23:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:22,579 INFO L225 Difference]: With dead ends: 143 [2023-02-14 21:23:22,579 INFO L226 Difference]: Without dead ends: 97 [2023-02-14 21:23:22,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-14 21:23:22,581 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:22,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:23:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-14 21:23:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-02-14 21:23:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2023-02-14 21:23:22,596 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 68 [2023-02-14 21:23:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:22,597 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2023-02-14 21:23:22,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2023-02-14 21:23:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-14 21:23:22,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:22,598 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:22,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:22,803 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 [2023-02-14 21:23:22,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash 949453489, now seen corresponding path program 5 times [2023-02-14 21:23:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454452184] [2023-02-14 21:23:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 21:23:23,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454452184] [2023-02-14 21:23:23,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454452184] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440431191] [2023-02-14 21:23:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:23:23,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:23,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:23,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 21:23:27,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-14 21:23:27,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 21:23:27,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 21:23:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 21:23:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440431191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:28,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:28,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-02-14 21:23:28,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968749490] [2023-02-14 21:23:28,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:28,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-14 21:23:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-14 21:23:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 21:23:28,821 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:28,953 INFO L93 Difference]: Finished difference Result 195 states and 250 transitions. [2023-02-14 21:23:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-14 21:23:28,954 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-02-14 21:23:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:28,955 INFO L225 Difference]: With dead ends: 195 [2023-02-14 21:23:28,955 INFO L226 Difference]: Without dead ends: 149 [2023-02-14 21:23:28,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 21:23:28,957 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:28,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:23:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-14 21:23:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-02-14 21:23:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 148 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2023-02-14 21:23:28,980 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 94 [2023-02-14 21:23:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:28,981 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2023-02-14 21:23:28,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2023-02-14 21:23:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-14 21:23:28,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:28,990 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:29,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:29,201 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 [2023-02-14 21:23:29,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2079151973, now seen corresponding path program 6 times [2023-02-14 21:23:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188977041] [2023-02-14 21:23:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 21:23:31,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188977041] [2023-02-14 21:23:31,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188977041] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594688557] [2023-02-14 21:23:31,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 21:23:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:31,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:31,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 21:23:32,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-14 21:23:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:32,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 21:23:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2023-02-14 21:23:32,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2023-02-14 21:23:32,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594688557] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:32,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:32,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2023-02-14 21:23:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676747366] [2023-02-14 21:23:32,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:32,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-14 21:23:32,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-14 21:23:32,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2023-02-14 21:23:32,443 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:33,781 INFO L93 Difference]: Finished difference Result 246 states and 308 transitions. [2023-02-14 21:23:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-14 21:23:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2023-02-14 21:23:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:33,783 INFO L225 Difference]: With dead ends: 246 [2023-02-14 21:23:33,783 INFO L226 Difference]: Without dead ends: 200 [2023-02-14 21:23:33,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4914, Invalid=8892, Unknown=0, NotChecked=0, Total=13806 [2023-02-14 21:23:33,791 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 379 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:33,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 109 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:23:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-14 21:23:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2023-02-14 21:23:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1616161616161615) internal successors, (230), 198 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 230 transitions. [2023-02-14 21:23:33,808 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 230 transitions. Word has length 146 [2023-02-14 21:23:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:33,809 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 230 transitions. [2023-02-14 21:23:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 230 transitions. [2023-02-14 21:23:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-14 21:23:33,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:33,814 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:33,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:34,021 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 [2023-02-14 21:23:34,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1233622247, now seen corresponding path program 7 times [2023-02-14 21:23:34,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:34,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387577076] [2023-02-14 21:23:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-14 21:23:36,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:36,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387577076] [2023-02-14 21:23:36,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387577076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:36,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509980919] [2023-02-14 21:23:36,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 21:23:36,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:36,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:36,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:36,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 21:23:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-14 21:23:36,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-14 21:23:36,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-14 21:23:39,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509980919] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:39,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:39,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-02-14 21:23:39,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021235167] [2023-02-14 21:23:39,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:39,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-02-14 21:23:39,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-02-14 21:23:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-02-14 21:23:39,022 INFO L87 Difference]: Start difference. First operand 199 states and 230 transitions. Second operand has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:39,318 INFO L93 Difference]: Finished difference Result 399 states and 513 transitions. [2023-02-14 21:23:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-14 21:23:39,318 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2023-02-14 21:23:39,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:39,321 INFO L225 Difference]: With dead ends: 399 [2023-02-14 21:23:39,321 INFO L226 Difference]: Without dead ends: 305 [2023-02-14 21:23:39,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-02-14 21:23:39,329 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:39,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:23:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-02-14 21:23:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-02-14 21:23:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.105263157894737) internal successors, (336), 304 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 336 transitions. [2023-02-14 21:23:39,342 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 336 transitions. Word has length 196 [2023-02-14 21:23:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:39,344 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 336 transitions. [2023-02-14 21:23:39,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 336 transitions. [2023-02-14 21:23:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-02-14 21:23:39,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:39,347 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:39,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:39,553 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 [2023-02-14 21:23:39,554 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2006247343, now seen corresponding path program 8 times [2023-02-14 21:23:39,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:39,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000761363] [2023-02-14 21:23:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:39,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-14 21:23:46,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:46,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000761363] [2023-02-14 21:23:46,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000761363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:46,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979486] [2023-02-14 21:23:46,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:23:46,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:46,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:23:46,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 21:23:46,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:23:46,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 106 conjunts are in the unsatisfiable core [2023-02-14 21:23:46,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-14 21:23:46,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-14 21:23:56,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:56,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:56,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2023-02-14 21:23:56,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964941307] [2023-02-14 21:23:56,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:56,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2023-02-14 21:23:56,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2023-02-14 21:23:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-02-14 21:23:56,797 INFO L87 Difference]: Start difference. First operand 305 states and 336 transitions. Second operand has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:57,451 INFO L93 Difference]: Finished difference Result 611 states and 778 transitions. [2023-02-14 21:23:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-02-14 21:23:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2023-02-14 21:23:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:57,455 INFO L225 Difference]: With dead ends: 611 [2023-02-14 21:23:57,455 INFO L226 Difference]: Without dead ends: 517 [2023-02-14 21:23:57,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-02-14 21:23:57,459 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:57,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 21:23:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-02-14 21:23:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2023-02-14 21:23:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.062015503875969) internal successors, (548), 516 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 548 transitions. [2023-02-14 21:23:57,476 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 548 transitions. Word has length 302 [2023-02-14 21:23:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:57,476 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 548 transitions. [2023-02-14 21:23:57,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 548 transitions. [2023-02-14 21:23:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-02-14 21:23:57,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:57,485 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:57,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 21:23:57,694 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 [2023-02-14 21:23:57,694 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:57,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1109860773, now seen corresponding path program 9 times [2023-02-14 21:23:57,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:57,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150501378] [2023-02-14 21:23:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:57,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:24:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-14 21:24:20,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:24:20,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150501378] [2023-02-14 21:24:20,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150501378] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:24:20,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670343894] [2023-02-14 21:24:20,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:24:20,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:24:20,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:24:20,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:24:20,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 21:24:22,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-14 21:24:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:24:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 21:24:23,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:24:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44387 trivial. 0 not checked. [2023-02-14 21:24:24,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:24:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44387 trivial. 0 not checked. [2023-02-14 21:24:25,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670343894] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:24:25,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:24:25,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2023-02-14 21:24:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876592956] [2023-02-14 21:24:25,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:24:25,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2023-02-14 21:24:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:24:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2023-02-14 21:24:25,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2023-02-14 21:24:25,419 INFO L87 Difference]: Start difference. First operand 517 states and 548 transitions. Second operand has 243 states, 243 states have (on average 2.1893004115226335) internal successors, (532), 243 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:24:42,844 INFO L93 Difference]: Finished difference Result 710 states and 836 transitions. [2023-02-14 21:24:42,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2023-02-14 21:24:42,845 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.1893004115226335) internal successors, (532), 243 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 514 [2023-02-14 21:24:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:24:42,848 INFO L225 Difference]: With dead ends: 710 [2023-02-14 21:24:42,848 INFO L226 Difference]: Without dead ends: 616 [2023-02-14 21:24:42,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28455 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=74346, Invalid=131316, Unknown=0, NotChecked=0, Total=205662 [2023-02-14 21:24:42,861 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2085 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2085 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 21:24:42,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2085 Valid, 196 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 21:24:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-02-14 21:24:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 615. [2023-02-14 21:24:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.1042345276872965) internal successors, (678), 614 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 678 transitions. [2023-02-14 21:24:42,891 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 678 transitions. Word has length 514 [2023-02-14 21:24:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:24:42,892 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 678 transitions. [2023-02-14 21:24:42,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.1893004115226335) internal successors, (532), 243 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 678 transitions. [2023-02-14 21:24:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-02-14 21:24:42,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:24:42,896 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:24:42,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 21:24:43,105 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 [2023-02-14 21:24:43,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:24:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:24:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1095157799, now seen corresponding path program 10 times [2023-02-14 21:24:43,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:24:43,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994028893] [2023-02-14 21:24:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:24:43,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:24:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:25:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-02-14 21:25:08,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:25:08,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994028893] [2023-02-14 21:25:08,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994028893] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:25:08,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291914594] [2023-02-14 21:25:08,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:25:08,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:25:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:25:08,076 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:25:08,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 21:25:15,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:25:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:25:15,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 213 conjunts are in the unsatisfiable core [2023-02-14 21:25:15,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:25:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-02-14 21:25:16,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:25:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-02-14 21:25:56,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291914594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:25:56,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:25:56,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2023-02-14 21:25:56,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235876006] [2023-02-14 21:25:56,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:25:56,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2023-02-14 21:25:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:25:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2023-02-14 21:25:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2023-02-14 21:25:56,959 INFO L87 Difference]: Start difference. First operand 615 states and 678 transitions. Second operand has 427 states, 427 states have (on average 2.0257611241217797) internal successors, (865), 427 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:26:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:26:01,943 INFO L93 Difference]: Finished difference Result 1231 states and 1569 transitions. [2023-02-14 21:26:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2023-02-14 21:26:01,944 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0257611241217797) internal successors, (865), 427 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 612 [2023-02-14 21:26:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:26:01,948 INFO L225 Difference]: With dead ends: 1231 [2023-02-14 21:26:01,948 INFO L226 Difference]: Without dead ends: 1041 [2023-02-14 21:26:01,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1011 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2023-02-14 21:26:01,956 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 21:26:01,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 154 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 21:26:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2023-02-14 21:26:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2023-02-14 21:26:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.0615384615384615) internal successors, (1104), 1040 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:26:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1104 transitions. [2023-02-14 21:26:01,988 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1104 transitions. Word has length 612 [2023-02-14 21:26:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:26:01,988 INFO L495 AbstractCegarLoop]: Abstraction has 1041 states and 1104 transitions. [2023-02-14 21:26:01,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0257611241217797) internal successors, (865), 427 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:26:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1104 transitions. [2023-02-14 21:26:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2023-02-14 21:26:01,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:26:01,998 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:26:02,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 21:26:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 21:26:02,209 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:26:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:26:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash -40706863, now seen corresponding path program 11 times [2023-02-14 21:26:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:26:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545636225] [2023-02-14 21:26:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:26:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:26:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat