./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono3_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/Mono3_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 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:08:52,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:08:52,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:08:52,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:08:52,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:08:52,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:08:52,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:08:52,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:08:52,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:08:52,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:08:52,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:08:52,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:08:52,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:08:52,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:08:52,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:08:52,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:08:52,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:08:52,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:08:52,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:08:52,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:08:52,908 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:08:52,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:08:52,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:08:52,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:08:52,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:08:52,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:08:52,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:08:52,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:08:52,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:08:52,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:08:52,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:08:52,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:08:52,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:08:52,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:08:52,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:08:52,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:08:52,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:08:52,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:08:52,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:08:52,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:08:52,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:08:52,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:08:52,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:08:52,952 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:08:52,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:08:52,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:08:52,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:08:52,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:08:52,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:08:52,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:08:52,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:08:52,969 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:08:52,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:08:52,970 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:08:52,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:08:52,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:08:52,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:08:52,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:08:52,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:08:52,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:08:52,971 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:08:52,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:08:52,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:08:52,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:08:52,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:08:52,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:08:52,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:08:52,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:08:52,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:08:52,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:08:52,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:08:52,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:08:52,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:08:52,973 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:08:52,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:08:52,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:08:52,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2022-07-19 15:08:53,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:08:53,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:08:53,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:08:53,149 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:08:53,149 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:08:53,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-07-19 15:08:53,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acd8dc26/317c963e9ed441a087636df9e35b9f9c/FLAGe306d1220 [2022-07-19 15:08:53,581 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:08:53,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-07-19 15:08:53,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acd8dc26/317c963e9ed441a087636df9e35b9f9c/FLAGe306d1220 [2022-07-19 15:08:53,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acd8dc26/317c963e9ed441a087636df9e35b9f9c [2022-07-19 15:08:53,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:08:53,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:08:53,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:08:53,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:08:53,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:08:53,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c0db5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53, skipping insertion in model container [2022-07-19 15:08:53,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:08:53,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:08:53,805 WARN L230 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/Mono3_1.c[311,324] [2022-07-19 15:08:53,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:08:53,819 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:08:53,827 WARN L230 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/Mono3_1.c[311,324] [2022-07-19 15:08:53,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:08:53,838 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:08:53,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53 WrapperNode [2022-07-19 15:08:53,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:08:53,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:08:53,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:08:53,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:08:53,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,859 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-07-19 15:08:53,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:08:53,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:08:53,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:08:53,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:08:53,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:08:53,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:08:53,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:08:53,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:08:53,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (1/1) ... [2022-07-19 15:08:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:08:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:08:53,919 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) [2022-07-19 15:08:53,936 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 [2022-07-19 15:08:53,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:08:53,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:08:53,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:08:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:08:53,987 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:08:53,988 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:08:54,058 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:08:54,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:08:54,062 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 15:08:54,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:08:54 BoogieIcfgContainer [2022-07-19 15:08:54,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:08:54,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:08:54,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:08:54,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:08:54,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:08:53" (1/3) ... [2022-07-19 15:08:54,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c24de42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:08:54, skipping insertion in model container [2022-07-19 15:08:54,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:08:53" (2/3) ... [2022-07-19 15:08:54,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c24de42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:08:54, skipping insertion in model container [2022-07-19 15:08:54,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:08:54" (3/3) ... [2022-07-19 15:08:54,069 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2022-07-19 15:08:54,079 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:08:54,079 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:08:54,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:08:54,117 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46c3e0f5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a35c700 [2022-07-19 15:08:54,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:08:54,121 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) [2022-07-19 15:08:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 15:08:54,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:08:54,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 15:08:54,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:08:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:08:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-19 15:08:54,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:08:54,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966016271] [2022-07-19 15:08:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:54,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:08:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:08:54,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:08:54,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966016271] [2022-07-19 15:08:54,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966016271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:08:54,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:08:54,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:08:54,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156647932] [2022-07-19 15:08:54,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:08:54,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:08:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:08:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:08:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:08:54,279 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) [2022-07-19 15:08:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:08:54,290 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-19 15:08:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:08:54,291 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 [2022-07-19 15:08:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:08:54,296 INFO L225 Difference]: With dead ends: 21 [2022-07-19 15:08:54,296 INFO L226 Difference]: Without dead ends: 9 [2022-07-19 15:08:54,299 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 [2022-07-19 15:08:54,302 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 [2022-07-19 15:08:54,303 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] [2022-07-19 15:08:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-19 15:08:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-19 15:08:54,322 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) [2022-07-19 15:08:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-19 15:08:54,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-19 15:08:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:08:54,325 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-19 15:08:54,325 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) [2022-07-19 15:08:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-19 15:08:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 15:08:54,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:08:54,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 15:08:54,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:08:54,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:08:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:08:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-19 15:08:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:08:54,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74117825] [2022-07-19 15:08:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:08:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:08:54,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:08:54,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74117825] [2022-07-19 15:08:54,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74117825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:08:54,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:08:54,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:08:54,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879258848] [2022-07-19 15:08:54,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:08:54,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:08:54,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:08:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:08:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:08:54,399 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-07-19 15:08:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:08:54,441 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-07-19 15:08:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:08:54,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-07-19 15:08:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:08:54,442 INFO L225 Difference]: With dead ends: 19 [2022-07-19 15:08:54,442 INFO L226 Difference]: Without dead ends: 12 [2022-07-19 15:08:54,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:08:54,443 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:08:54,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:08:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-19 15:08:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-07-19 15:08:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:08:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-19 15:08:54,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-07-19 15:08:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:08:54,447 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-19 15:08:54,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-07-19 15:08:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-19 15:08:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 15:08:54,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:08:54,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:08:54,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:08:54,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:08:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:08:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2022-07-19 15:08:54,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:08:54,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963138707] [2022-07-19 15:08:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:08:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:08:54,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:08:54,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963138707] [2022-07-19 15:08:54,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963138707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:08:54,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811616352] [2022-07-19 15:08:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:54,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:54,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:08:54,513 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) [2022-07-19 15:08:54,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:08:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:08:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:08:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:08:54,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:08:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:08:54,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811616352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:08:54,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:08:54,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 12 [2022-07-19 15:08:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182830478] [2022-07-19 15:08:54,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:08:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:08:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:08:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:08:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:08:54,764 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:08:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:08:54,951 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-07-19 15:08:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:08:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-19 15:08:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:08:54,953 INFO L225 Difference]: With dead ends: 31 [2022-07-19 15:08:54,953 INFO L226 Difference]: Without dead ends: 20 [2022-07-19 15:08:54,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:08:54,957 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:08:54,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:08:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-19 15:08:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-07-19 15:08:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2022-07-19 15:08:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-19 15:08:54,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2022-07-19 15:08:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:08:54,965 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-19 15:08:54,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:08:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-19 15:08:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 15:08:54,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:08:54,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:08:54,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 15:08:55,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:55,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:08:55,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:08:55,184 INFO L85 PathProgramCache]: Analyzing trace with hash 329880921, now seen corresponding path program 1 times [2022-07-19 15:08:55,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:08:55,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194929602] [2022-07-19 15:08:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:55,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:08:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:08:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:08:55,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194929602] [2022-07-19 15:08:55,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194929602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:08:55,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683765877] [2022-07-19 15:08:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:55,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:55,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:08:55,287 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) [2022-07-19 15:08:55,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:08:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:08:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:08:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:08:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:08:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:08:55,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683765877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:08:55,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:08:55,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-07-19 15:08:55,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471319531] [2022-07-19 15:08:55,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:08:55,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:08:55,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:08:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:08:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:08:55,480 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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) [2022-07-19 15:08:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:08:55,775 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-07-19 15:08:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:08:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 15 [2022-07-19 15:08:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:08:55,776 INFO L225 Difference]: With dead ends: 56 [2022-07-19 15:08:55,776 INFO L226 Difference]: Without dead ends: 43 [2022-07-19 15:08:55,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:08:55,778 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:08:55,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:08:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-19 15:08:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-07-19 15:08:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-07-19 15:08:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-19 15:08:55,789 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-07-19 15:08:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:08:55,790 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-19 15:08:55,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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) [2022-07-19 15:08:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-19 15:08:55,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 15:08:55,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:08:55,791 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 15:08:55,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 15:08:55,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 15:08:55,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:08:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:08:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1412883461, now seen corresponding path program 2 times [2022-07-19 15:08:55,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:08:55,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698540325] [2022-07-19 15:08:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:55,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:08:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:08:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:08:56,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698540325] [2022-07-19 15:08:56,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698540325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:08:56,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369829235] [2022-07-19 15:08:56,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:08:56,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:56,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:08:56,112 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) [2022-07-19 15:08:56,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:08:56,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:08:56,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:08:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:08:56,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:08:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 15:08:56,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:08:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 15:08:56,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369829235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:08:56,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:08:56,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-19 15:08:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614434765] [2022-07-19 15:08:56,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:08:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 15:08:56,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:08:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 15:08:56,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:08:56,319 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-07-19 15:08:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:08:56,702 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2022-07-19 15:08:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:08:56,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 21 [2022-07-19 15:08:56,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:08:56,703 INFO L225 Difference]: With dead ends: 111 [2022-07-19 15:08:56,703 INFO L226 Difference]: Without dead ends: 81 [2022-07-19 15:08:56,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-07-19 15:08:56,704 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:08:56,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:08:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-19 15:08:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-07-19 15:08:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 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) [2022-07-19 15:08:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-19 15:08:56,715 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 21 [2022-07-19 15:08:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:08:56,715 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-19 15:08:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-07-19 15:08:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-19 15:08:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:08:56,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:08:56,716 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2022-07-19 15:08:56,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:08:56,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:56,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:08:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:08:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -922085543, now seen corresponding path program 3 times [2022-07-19 15:08:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:08:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926521278] [2022-07-19 15:08:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:08:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 15:08:57,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:08:57,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926521278] [2022-07-19 15:08:57,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926521278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:08:57,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172611727] [2022-07-19 15:08:57,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:08:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:08:57,007 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) [2022-07-19 15:08:57,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:08:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 15:08:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:08:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:08:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:08:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 15:08:57,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:08:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 15:08:57,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172611727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:08:57,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:08:57,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-07-19 15:08:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036816950] [2022-07-19 15:08:57,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:08:57,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 15:08:57,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:08:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 15:08:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:08:57,430 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2022-07-19 15:08:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:08:59,341 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2022-07-19 15:08:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 15:08:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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 27 [2022-07-19 15:08:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:08:59,343 INFO L225 Difference]: With dead ends: 115 [2022-07-19 15:08:59,343 INFO L226 Difference]: Without dead ends: 77 [2022-07-19 15:08:59,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2022-07-19 15:08:59,345 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:08:59,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:08:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-19 15:08:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 52. [2022-07-19 15:08:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 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) [2022-07-19 15:08:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-07-19 15:08:59,353 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 27 [2022-07-19 15:08:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:08:59,353 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-07-19 15:08:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2022-07-19 15:08:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-07-19 15:08:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 15:08:59,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:08:59,355 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 15:08:59,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 15:08:59,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:59,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:08:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:08:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash -522566631, now seen corresponding path program 4 times [2022-07-19 15:08:59,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:08:59,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650788815] [2022-07-19 15:08:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:08:59,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:08:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:08:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 173 proven. 57 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 15:08:59,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:08:59,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650788815] [2022-07-19 15:08:59,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650788815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:08:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853930503] [2022-07-19 15:08:59,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:08:59,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:08:59,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:08:59,708 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) [2022-07-19 15:08:59,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:08:59,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:08:59,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:08:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 15:08:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:08:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 15:08:59,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:09:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 15:09:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853930503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:09:00,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:09:00,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-07-19 15:09:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31302506] [2022-07-19 15:09:00,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:09:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 15:09:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:09:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 15:09:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-07-19 15:09:00,199 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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) [2022-07-19 15:09:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:09:11,386 INFO L93 Difference]: Finished difference Result 1187 states and 1366 transitions. [2022-07-19 15:09:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-07-19 15:09:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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 51 [2022-07-19 15:09:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:09:11,390 INFO L225 Difference]: With dead ends: 1187 [2022-07-19 15:09:11,391 INFO L226 Difference]: Without dead ends: 1152 [2022-07-19 15:09:11,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3209, Invalid=15151, Unknown=0, NotChecked=0, Total=18360 [2022-07-19 15:09:11,397 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:09:11,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 101 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 15:09:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-07-19 15:09:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 814. [2022-07-19 15:09:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 1.1832718327183271) internal successors, (962), 813 states have internal predecessors, (962), 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) [2022-07-19 15:09:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 962 transitions. [2022-07-19 15:09:11,474 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 962 transitions. Word has length 51 [2022-07-19 15:09:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:09:11,474 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 962 transitions. [2022-07-19 15:09:11,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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) [2022-07-19 15:09:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 962 transitions. [2022-07-19 15:09:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 15:09:11,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:09:11,478 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 1, 1, 1, 1, 1, 1] [2022-07-19 15:09:11,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:09:11,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:09:11,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:09:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:09:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash 617649339, now seen corresponding path program 5 times [2022-07-19 15:09:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:09:11,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99688203] [2022-07-19 15:09:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:09:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:09:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:09:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 222 proven. 77 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-19 15:09:11,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:09:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99688203] [2022-07-19 15:09:11,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99688203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:09:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673243751] [2022-07-19 15:09:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:09:11,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:09:11,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:09:11,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:09:11,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:09:12,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-19 15:09:12,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:09:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 15:09:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:09:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 1 proven. 405 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:09:12,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:09:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:09:12,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673243751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:09:12,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:09:12,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 35 [2022-07-19 15:09:12,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352466147] [2022-07-19 15:09:12,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:09:12,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:09:12,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:09:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:09:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:09:12,638 INFO L87 Difference]: Start difference. First operand 814 states and 962 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:09:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:09:38,904 INFO L93 Difference]: Finished difference Result 3471 states and 4041 transitions. [2022-07-19 15:09:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-07-19 15:09:38,904 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-19 15:09:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:09:38,911 INFO L225 Difference]: With dead ends: 3471 [2022-07-19 15:09:38,911 INFO L226 Difference]: Without dead ends: 2831 [2022-07-19 15:09:38,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14307 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=6498, Invalid=31332, Unknown=0, NotChecked=0, Total=37830 [2022-07-19 15:09:38,919 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:09:38,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 15:09:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-07-19 15:09:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 939. [2022-07-19 15:09:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.183368869936034) internal successors, (1110), 938 states have internal predecessors, (1110), 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) [2022-07-19 15:09:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1110 transitions. [2022-07-19 15:09:38,985 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1110 transitions. Word has length 57 [2022-07-19 15:09:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:09:38,986 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1110 transitions. [2022-07-19 15:09:38,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:09:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1110 transitions. [2022-07-19 15:09:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 15:09:38,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:09:38,989 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-19 15:09:38,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:09:39,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:09:39,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:09:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:09:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1480398352, now seen corresponding path program 6 times [2022-07-19 15:09:39,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:09:39,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868737884] [2022-07-19 15:09:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:09:39,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:09:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:09:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 15:09:39,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:09:39,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868737884] [2022-07-19 15:09:39,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868737884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:09:39,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304726435] [2022-07-19 15:09:39,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:09:39,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:09:39,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:09:39,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:09:39,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:09:39,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-19 15:09:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:09:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 15:09:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:09:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 221 proven. 227 refuted. 3 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 15:09:43,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:09:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 15:09:45,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304726435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:09:45,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:09:45,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 14] total 44 [2022-07-19 15:09:45,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230485594] [2022-07-19 15:09:45,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:09:45,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 15:09:45,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:09:45,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 15:09:45,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1335, Unknown=1, NotChecked=0, Total=1892 [2022-07-19 15:09:45,536 INFO L87 Difference]: Start difference. First operand 939 states and 1110 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 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) [2022-07-19 15:10:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:10:20,359 INFO L93 Difference]: Finished difference Result 1333 states and 1604 transitions. [2022-07-19 15:10:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 15:10:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 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 [2022-07-19 15:10:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:10:20,361 INFO L225 Difference]: With dead ends: 1333 [2022-07-19 15:10:20,361 INFO L226 Difference]: Without dead ends: 431 [2022-07-19 15:10:20,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=1119, Invalid=2072, Unknown=1, NotChecked=0, Total=3192 [2022-07-19 15:10:20,362 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 276 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:10:20,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 42 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 15:10:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-07-19 15:10:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 103. [2022-07-19 15:10:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 states have internal predecessors, (115), 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) [2022-07-19 15:10:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-07-19 15:10:20,371 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 60 [2022-07-19 15:10:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:10:20,371 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-07-19 15:10:20,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 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) [2022-07-19 15:10:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-07-19 15:10:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 15:10:20,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:10:20,372 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 21, 11, 1, 1, 1, 1, 1, 1] [2022-07-19 15:10:20,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:10:20,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:10:20,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:10:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:10:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2038282736, now seen corresponding path program 7 times [2022-07-19 15:10:20,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:10:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986488724] [2022-07-19 15:10:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:10:20,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:10:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:10:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 723 proven. 187 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-19 15:10:20,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:10:20,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986488724] [2022-07-19 15:10:20,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986488724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:10:20,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655129547] [2022-07-19 15:10:20,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:10:20,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:10:20,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:10:20,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:10:20,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:10:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:10:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-19 15:10:20,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:10:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:10:21,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:10:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:10:22,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655129547] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:10:22,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:10:22,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 59 [2022-07-19 15:10:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324383630] [2022-07-19 15:10:22,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:10:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-19 15:10:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:10:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-19 15:10:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 15:10:22,298 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 59 states, 59 states have (on average 3.406779661016949) internal successors, (201), 59 states have internal predecessors, (201), 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) [2022-07-19 15:10:58,752 WARN L233 SmtUtils]: Spent 16.56s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:10:59,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 15:11:01,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 15:11:49,054 WARN L233 SmtUtils]: Spent 20.63s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:11:52,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 15:12:31,638 WARN L233 SmtUtils]: Spent 18.29s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:12:33,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 15:13:01,785 WARN L233 SmtUtils]: Spent 10.77s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:13:03,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 15:13:08,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 15:13:35,647 WARN L233 SmtUtils]: Spent 13.21s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:13:37,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []