./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono5_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/loops-crafted-1/Mono5_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d27ce9425b362883f32c5ccf3973d31d4f8100e5e6b8fcc1a4527c07eb2b71c --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:06:13,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:06:13,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:06:13,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:06:13,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:06:13,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:06:13,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:06:13,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:06:13,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:06:13,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:06:13,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:06:13,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:06:13,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:06:13,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:06:13,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:06:13,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:06:13,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:06:13,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:06:13,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:06:13,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:06:13,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:06:13,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:06:13,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:06:13,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:06:13,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:06:13,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:06:13,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:06:13,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:06:13,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:06:13,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:06:13,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:06:13,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:06:13,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:06:13,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:06:13,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:06:13,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:06:13,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:06:13,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:06:13,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:06:13,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:06:13,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:06:13,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:06:14,029 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:06:14,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:06:14,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:06:14,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:06:14,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:06:14,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:06:14,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:06:14,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:06:14,032 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:06:14,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:06:14,033 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:06:14,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:06:14,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:06:14,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:06:14,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:06:14,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:06:14,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:06:14,034 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:06:14,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:06:14,034 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:06:14,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:06:14,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:06:14,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:06:14,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:06:14,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:06:14,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:06:14,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:06:14,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:06:14,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:06:14,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:06:14,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:06:14,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:06:14,036 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:06:14,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:06:14,037 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:06:14,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d27ce9425b362883f32c5ccf3973d31d4f8100e5e6b8fcc1a4527c07eb2b71c [2023-02-15 11:06:14,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:06:14,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:06:14,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:06:14,226 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:06:14,226 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:06:14,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono5_1.c [2023-02-15 11:06:15,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:06:15,315 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:06:15,315 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono5_1.c [2023-02-15 11:06:15,319 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7cf1892/e30e7275132348848b6a96bfbce844f0/FLAGd5a841f9f [2023-02-15 11:06:15,746 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7cf1892/e30e7275132348848b6a96bfbce844f0 [2023-02-15 11:06:15,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:06:15,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:06:15,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:06:15,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:06:15,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:06:15,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11732a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15, skipping insertion in model container [2023-02-15 11:06:15,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:06:15,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:06:15,885 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/loops-crafted-1/Mono5_1.c[311,324] [2023-02-15 11:06:15,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:06:15,899 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:06:15,906 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/loops-crafted-1/Mono5_1.c[311,324] [2023-02-15 11:06:15,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:06:15,916 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:06:15,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15 WrapperNode [2023-02-15 11:06:15,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:06:15,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:06:15,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:06:15,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:06:15,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,937 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2023-02-15 11:06:15,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:06:15,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:06:15,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:06:15,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:06:15,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:06:15,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:06:15,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:06:15,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:06:15,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (1/1) ... [2023-02-15 11:06:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:06:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:15,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 11:06:15,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 11:06:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:06:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:06:15,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:06:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:06:16,035 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:06:16,037 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:06:16,116 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:06:16,119 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:06:16,120 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:06:16,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:06:16 BoogieIcfgContainer [2023-02-15 11:06:16,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:06:16,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:06:16,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:06:16,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:06:16,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:06:15" (1/3) ... [2023-02-15 11:06:16,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3318ed22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:06:16, skipping insertion in model container [2023-02-15 11:06:16,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:06:15" (2/3) ... [2023-02-15 11:06:16,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3318ed22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:06:16, skipping insertion in model container [2023-02-15 11:06:16,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:06:16" (3/3) ... [2023-02-15 11:06:16,126 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2023-02-15 11:06:16,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:06:16,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:06:16,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:06:16,198 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;@70554c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:06:16,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:06:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 11:06:16,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:16,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 11:06:16,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2023-02-15 11:06:16,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712159026] [2023-02-15 11:06:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:16,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712159026] [2023-02-15 11:06:16,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712159026] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:06:16,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:06:16,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:06:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668235932] [2023-02-15 11:06:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:06:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:06:16,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:16,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:06:16,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:06:16,342 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-15 11:06:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:16,355 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-02-15 11:06:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:06:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-02-15 11:06:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:16,361 INFO L225 Difference]: With dead ends: 21 [2023-02-15 11:06:16,362 INFO L226 Difference]: Without dead ends: 9 [2023-02-15 11:06:16,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:06:16,368 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:16,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:06:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-02-15 11:06:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-02-15 11:06:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2023-02-15 11:06:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-02-15 11:06:16,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2023-02-15 11:06:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:16,387 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-02-15 11:06:16,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-15 11:06:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-02-15 11:06:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 11:06:16,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:16,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 11:06:16,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 11:06:16,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:16,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:16,389 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2023-02-15 11:06:16,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:16,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306043162] [2023-02-15 11:06:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:16,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:16,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306043162] [2023-02-15 11:06:16,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306043162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:06:16,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:06:16,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:06:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781086963] [2023-02-15 11:06:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:06:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:06:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:06:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:06:16,511 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 11:06:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:16,528 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-02-15 11:06:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:06:16,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-02-15 11:06:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:16,529 INFO L225 Difference]: With dead ends: 16 [2023-02-15 11:06:16,529 INFO L226 Difference]: Without dead ends: 12 [2023-02-15 11:06:16,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:06:16,530 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:16,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:06:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-15 11:06:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-15 11:06:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-15 11:06:16,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2023-02-15 11:06:16,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:16,533 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-15 11:06:16,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 11:06:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-15 11:06:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 11:06:16,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:16,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:16,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 11:06:16,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:16,535 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2023-02-15 11:06:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:16,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703622726] [2023-02-15 11:06:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:16,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703622726] [2023-02-15 11:06:16,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703622726] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:06:16,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:06:16,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:06:16,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087308007] [2023-02-15 11:06:16,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:06:16,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 11:06:16,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 11:06:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:06:16,601 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-15 11:06:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:16,612 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-02-15 11:06:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 11:06:16,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2023-02-15 11:06:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:16,613 INFO L225 Difference]: With dead ends: 22 [2023-02-15 11:06:16,613 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 11:06:16,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:06:16,614 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:16,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:06:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 11:06:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-02-15 11:06:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-02-15 11:06:16,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2023-02-15 11:06:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:16,618 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-02-15 11:06:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-15 11:06:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-02-15 11:06:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 11:06:16,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:16,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:16,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 11:06:16,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2007312204, now seen corresponding path program 1 times [2023-02-15 11:06:16,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:16,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359945494] [2023-02-15 11:06:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:16,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359945494] [2023-02-15 11:06:16,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359945494] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124572858] [2023-02-15 11:06:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:16,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:16,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:16,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:06:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:16,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 11:06:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 11:06:16,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 11:06:16,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124572858] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:16,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:16,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-02-15 11:06:16,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378042101] [2023-02-15 11:06:16,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:16,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:06:16,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:16,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:06:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:06:16,999 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:17,087 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-02-15 11:06:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 11:06:17,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 11:06:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:17,088 INFO L225 Difference]: With dead ends: 40 [2023-02-15 11:06:17,088 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 11:06:17,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:06:17,090 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:17,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:06:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 11:06:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-15 11:06:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-02-15 11:06:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-15 11:06:17,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 12 [2023-02-15 11:06:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:17,095 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-15 11:06:17,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-15 11:06:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 11:06:17,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:17,096 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:17,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:17,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:17,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:17,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1502357326, now seen corresponding path program 2 times [2023-02-15 11:06:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:17,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035616504] [2023-02-15 11:06:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:06:17,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035616504] [2023-02-15 11:06:17,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035616504] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851330685] [2023-02-15 11:06:17,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:06:17,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:17,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:17,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:17,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:06:17,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:06:17,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:17,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 11:06:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 11:06:17,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 11:06:17,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851330685] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:17,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:17,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 17 [2023-02-15 11:06:17,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178774220] [2023-02-15 11:06:17,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:17,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 11:06:17,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 11:06:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:06:17,683 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 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) [2023-02-15 11:06:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:18,088 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2023-02-15 11:06:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 11:06:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 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 [2023-02-15 11:06:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:18,089 INFO L225 Difference]: With dead ends: 76 [2023-02-15 11:06:18,089 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 11:06:18,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2023-02-15 11:06:18,090 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:18,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 133 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:06:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 11:06:18,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-15 11:06:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 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) [2023-02-15 11:06:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-02-15 11:06:18,096 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 24 [2023-02-15 11:06:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:18,096 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-02-15 11:06:18,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 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) [2023-02-15 11:06:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-02-15 11:06:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 11:06:18,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:18,098 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:18,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:18,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:18,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash 314984633, now seen corresponding path program 3 times [2023-02-15 11:06:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:18,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788431204] [2023-02-15 11:06:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:18,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 11:06:18,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:18,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788431204] [2023-02-15 11:06:18,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788431204] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:18,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455347787] [2023-02-15 11:06:18,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:06:18,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:18,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:18,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:06:18,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-15 11:06:18,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:18,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 11:06:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 11:06:18,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 11:06:18,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455347787] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:18,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:18,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-02-15 11:06:18,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229974999] [2023-02-15 11:06:18,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:18,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 11:06:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 11:06:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:06:18,712 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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) [2023-02-15 11:06:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:19,054 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2023-02-15 11:06:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 11:06:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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 45 [2023-02-15 11:06:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:19,054 INFO L225 Difference]: With dead ends: 106 [2023-02-15 11:06:19,054 INFO L226 Difference]: Without dead ends: 72 [2023-02-15 11:06:19,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:06:19,055 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:19,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 33 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:06:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-15 11:06:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2023-02-15 11:06:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 states have internal predecessors, (73), 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) [2023-02-15 11:06:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-02-15 11:06:19,063 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 45 [2023-02-15 11:06:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:19,063 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-02-15 11:06:19,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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) [2023-02-15 11:06:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-02-15 11:06:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 11:06:19,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:19,064 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 10, 8, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:19,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 11:06:19,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:19,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -487009614, now seen corresponding path program 4 times [2023-02-15 11:06:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:19,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474681436] [2023-02-15 11:06:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 11:06:19,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474681436] [2023-02-15 11:06:19,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474681436] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:19,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116613911] [2023-02-15 11:06:19,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:06:19,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:19,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:19,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:19,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:06:19,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:06:19,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 11:06:19,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-15 11:06:19,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-15 11:06:20,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116613911] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:20,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:20,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 35 [2023-02-15 11:06:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704688178] [2023-02-15 11:06:20,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:20,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 11:06:20,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 11:06:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 11:06:20,131 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 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) [2023-02-15 11:06:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:34,514 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2023-02-15 11:06:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 11:06:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 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 60 [2023-02-15 11:06:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:34,516 INFO L225 Difference]: With dead ends: 160 [2023-02-15 11:06:34,516 INFO L226 Difference]: Without dead ends: 102 [2023-02-15 11:06:34,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=935, Invalid=3354, Unknown=1, NotChecked=0, Total=4290 [2023-02-15 11:06:34,517 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 254 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:34,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 478 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:06:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-15 11:06:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-02-15 11:06:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.24) internal successors, (124), 100 states have internal predecessors, (124), 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) [2023-02-15 11:06:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2023-02-15 11:06:34,533 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 60 [2023-02-15 11:06:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:34,534 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2023-02-15 11:06:34,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 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) [2023-02-15 11:06:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2023-02-15 11:06:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 11:06:34,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:34,535 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 22, 9, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:34,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:34,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:34,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:34,743 INFO L85 PathProgramCache]: Analyzing trace with hash 157606297, now seen corresponding path program 5 times [2023-02-15 11:06:34,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:34,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079938564] [2023-02-15 11:06:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:34,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 628 proven. 126 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-02-15 11:06:34,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079938564] [2023-02-15 11:06:34,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079938564] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137363818] [2023-02-15 11:06:34,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:06:34,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:34,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:35,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:35,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:06:46,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-02-15 11:06:46,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-15 11:06:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 11:06:46,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 11:06:48,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137363818] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:48,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:48,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26, 26] total 60 [2023-02-15 11:06:48,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554814645] [2023-02-15 11:06:48,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:48,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 11:06:48,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 11:06:48,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=2884, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 11:06:48,038 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 60 states, 60 states have (on average 3.033333333333333) internal successors, (182), 60 states have internal predecessors, (182), 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) [2023-02-15 11:06:50,908 WARN L837 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967278) 4294967296))) (not (= (mod (+ 4294967283 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967274 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0)) (not (= (mod (+ 4294967275 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0)) (not (= (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967279 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967289) 4294967296) 0)) (not (= (mod (+ 4294967288 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967282 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967284) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967286) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967285) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967281) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967287) 4294967296) 0)) (not (= (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967276 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) is different from false [2023-02-15 11:06:52,932 WARN L837 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967278) 4294967296))) (not (= (mod (+ 4294967283 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967274 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967275 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0)) (not (= (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967279 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967289) 4294967296) 0)) (not (= (mod (+ 4294967288 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967282 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967284) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967286) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967285) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967281) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967287) 4294967296) 0)) (not (= (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967276 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) is different from false [2023-02-15 11:06:54,976 WARN L837 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967278) 4294967296))) (not (= (mod (+ 4294967283 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0)) (not (= (mod (+ 4294967275 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0)) (not (= (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967279 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967289) 4294967296) 0)) (not (= (mod (+ 4294967288 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967282 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967284) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967286) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967285) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967281) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967287) 4294967296) 0)) (not (= (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967276 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) is different from false [2023-02-15 11:07:51,982 WARN L233 SmtUtils]: Spent 30.74s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:08:46,303 WARN L233 SmtUtils]: Spent 35.18s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:09:35,779 WARN L233 SmtUtils]: Spent 24.58s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:09:37,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:10:10,873 WARN L233 SmtUtils]: Spent 16.55s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:10:54,342 WARN L233 SmtUtils]: Spent 23.00s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)