./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/mapsum1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/mapsum1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash befec220f7e47e3c672ecda510923d232ca8d73dd5b744e98031f552117225df --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:26:49,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:26:49,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:26:49,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:26:49,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:26:49,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:26:49,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:26:49,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:26:49,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:26:49,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:26:49,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:26:49,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:26:49,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:26:49,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:26:49,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:26:49,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:26:49,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:26:49,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:26:49,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:26:49,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:26:49,927 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:26:49,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:26:49,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:26:49,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:26:49,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:26:49,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:26:49,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:26:49,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:26:49,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:26:49,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:26:49,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:26:49,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:26:49,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:26:49,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:26:49,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:26:49,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:26:49,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:26:49,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:26:49,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:26:49,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:26:49,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:26:49,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:26:49,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:26:49,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:26:49,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:26:49,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:26:49,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:26:49,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:26:49,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:26:49,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:26:49,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:26:49,977 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:26:49,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:26:49,978 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:26:49,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:26:49,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:26:49,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:26:49,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:26:49,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:26:49,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:26:49,980 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:26:49,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:26:49,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:26:49,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:26:49,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:26:49,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:26:49,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:26:49,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:26:49,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:26:49,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:26:49,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:26:49,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:26:49,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:26:49,983 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:26:49,983 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:26:49,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:26:49,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> befec220f7e47e3c672ecda510923d232ca8d73dd5b744e98031f552117225df [2022-07-13 10:26:50,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:26:50,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:26:50,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:26:50,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:26:50,227 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:26:50,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum1.i [2022-07-13 10:26:50,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/956bdba6e/ae3ac8a95f12442cb3321472101cfbfe/FLAG8ce909404 [2022-07-13 10:26:50,606 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:26:50,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum1.i [2022-07-13 10:26:50,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/956bdba6e/ae3ac8a95f12442cb3321472101cfbfe/FLAG8ce909404 [2022-07-13 10:26:51,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/956bdba6e/ae3ac8a95f12442cb3321472101cfbfe [2022-07-13 10:26:51,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:26:51,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:26:51,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:26:51,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:26:51,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:26:51,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae3a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51, skipping insertion in model container [2022-07-13 10:26:51,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:26:51,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:26:51,207 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/array-crafted/mapsum1.i[1300,1313] [2022-07-13 10:26:51,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:26:51,218 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:26:51,239 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/array-crafted/mapsum1.i[1300,1313] [2022-07-13 10:26:51,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:26:51,255 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:26:51,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51 WrapperNode [2022-07-13 10:26:51,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:26:51,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:26:51,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:26:51,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:26:51,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,283 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-13 10:26:51,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:26:51,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:26:51,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:26:51,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:26:51,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:26:51,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:26:51,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:26:51,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:26:51,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (1/1) ... [2022-07-13 10:26:51,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:26:51,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:51,351 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) [2022-07-13 10:26:51,352 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 [2022-07-13 10:26:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:26:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2022-07-13 10:26:51,377 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2022-07-13 10:26:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:26:51,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:26:51,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:26:51,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:26:51,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:26:51,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:26:51,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:26:51,423 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:26:51,424 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:26:51,536 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:26:51,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:26:51,542 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 10:26:51,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:26:51 BoogieIcfgContainer [2022-07-13 10:26:51,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:26:51,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:26:51,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:26:51,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:26:51,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:26:51" (1/3) ... [2022-07-13 10:26:51,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d46fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:26:51, skipping insertion in model container [2022-07-13 10:26:51,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:51" (2/3) ... [2022-07-13 10:26:51,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d46fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:26:51, skipping insertion in model container [2022-07-13 10:26:51,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:26:51" (3/3) ... [2022-07-13 10:26:51,568 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum1.i [2022-07-13 10:26:51,580 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:26:51,580 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:26:51,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:26:51,664 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@66f07487, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@fc919aa [2022-07-13 10:26:51,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:26:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:26:51,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:51,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:51,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-07-13 10:26:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:51,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254444736] [2022-07-13 10:26:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:51,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:26:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:51,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 10:26:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:26:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 10:26:51,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:51,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254444736] [2022-07-13 10:26:51,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254444736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980163271] [2022-07-13 10:26:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:51,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:51,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:52,001 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) [2022-07-13 10:26:52,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:26:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:52,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:26:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:26:52,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:26:52,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980163271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:26:52,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:26:52,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 10:26:52,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107056426] [2022-07-13 10:26:52,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:26:52,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:26:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:26:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:26:52,162 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:26:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:52,195 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-13 10:26:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:26:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 10:26:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:52,210 INFO L225 Difference]: With dead ends: 50 [2022-07-13 10:26:52,210 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 10:26:52,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:26:52,215 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:52,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:26:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 10:26:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-13 10:26:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-13 10:26:52,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-13 10:26:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:52,246 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-13 10:26:52,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:26:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-13 10:26:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 10:26:52,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:52,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:52,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:52,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-13 10:26:52,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:52,465 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-07-13 10:26:52,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:52,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672559587] [2022-07-13 10:26:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:52,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:26:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:52,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 10:26:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:26:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:26:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:52,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672559587] [2022-07-13 10:26:52,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672559587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:52,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537101334] [2022-07-13 10:26:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:52,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:52,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:52,560 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) [2022-07-13 10:26:52,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:26:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:26:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:26:52,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:26:52,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537101334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:26:52,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:26:52,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 10:26:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595412776] [2022-07-13 10:26:52,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:26:52,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:26:52,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:52,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:26:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:26:52,658 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:26:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:52,671 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-07-13 10:26:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:26:52,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-13 10:26:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:52,673 INFO L225 Difference]: With dead ends: 42 [2022-07-13 10:26:52,673 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:26:52,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:26:52,675 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:52,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:26:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:26:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-13 10:26:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-13 10:26:52,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-07-13 10:26:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:52,681 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-13 10:26:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:26:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-13 10:26:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 10:26:52,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:52,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:52,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:52,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-13 10:26:52,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-07-13 10:26:52,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:52,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249812553] [2022-07-13 10:26:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:52,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:26:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 10:26:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:26:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 10:26:53,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:53,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249812553] [2022-07-13 10:26:53,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249812553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:53,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368861834] [2022-07-13 10:26:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:53,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:53,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:53,065 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) [2022-07-13 10:26:53,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:26:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:26:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 10:26:53,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:26:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368861834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:26:53,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:26:53,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 10:26:53,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64565312] [2022-07-13 10:26:53,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:26:53,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:26:53,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:26:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:26:53,175 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:26:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:53,191 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-13 10:26:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:26:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-13 10:26:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:53,193 INFO L225 Difference]: With dead ends: 39 [2022-07-13 10:26:53,193 INFO L226 Difference]: Without dead ends: 26 [2022-07-13 10:26:53,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:26:53,194 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:53,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:26:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-13 10:26:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-13 10:26:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-13 10:26:53,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-07-13 10:26:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:53,201 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-13 10:26:53,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:26:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-13 10:26:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 10:26:53,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:53,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:53,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:53,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:53,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:53,422 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-07-13 10:26:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:53,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306106558] [2022-07-13 10:26:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:53,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:26:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 10:26:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:26:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 10:26:53,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306106558] [2022-07-13 10:26:53,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306106558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214151748] [2022-07-13 10:26:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:53,486 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) [2022-07-13 10:26:53,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:26:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:26:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-13 10:26:53,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:26:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-13 10:26:53,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214151748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:26:53,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:26:53,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-13 10:26:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291939046] [2022-07-13 10:26:53,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:26:53,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:26:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:26:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:26:53,640 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:26:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:53,685 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-13 10:26:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:26:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-07-13 10:26:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:53,689 INFO L225 Difference]: With dead ends: 54 [2022-07-13 10:26:53,689 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 10:26:53,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:26:53,691 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:53,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:26:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 10:26:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-07-13 10:26:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-13 10:26:53,704 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-07-13 10:26:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:53,704 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-13 10:26:53,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:26:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-13 10:26:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:26:53,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:53,706 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:53,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:53,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:53,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:53,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:53,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-07-13 10:26:53,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:53,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266810835] [2022-07-13 10:26:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:53,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 10:26:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 10:26:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 10:26:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 10:26:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:54,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266810835] [2022-07-13 10:26:54,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266810835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:54,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429107452] [2022-07-13 10:26:54,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:26:54,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:54,074 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) [2022-07-13 10:26:54,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:26:54,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:26:54,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:26:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:26:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 10:26:54,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:26:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 10:26:54,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429107452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:26:54,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:26:54,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-13 10:26:54,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131949205] [2022-07-13 10:26:54,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:26:54,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:26:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:26:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:26:54,299 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:26:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:54,343 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-07-13 10:26:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:26:54,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-07-13 10:26:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:54,345 INFO L225 Difference]: With dead ends: 70 [2022-07-13 10:26:54,345 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 10:26:54,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:26:54,346 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:54,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:26:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 10:26:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-13 10:26:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-13 10:26:54,353 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-07-13 10:26:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:54,353 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-13 10:26:54,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:26:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-13 10:26:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:26:54,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:54,355 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:54,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:54,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:54,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2022-07-13 10:26:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:54,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623517457] [2022-07-13 10:26:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:26:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 10:26:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:26:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-13 10:26:54,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:54,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623517457] [2022-07-13 10:26:54,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623517457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:54,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823463763] [2022-07-13 10:26:54,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:26:54,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:54,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:54,765 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) [2022-07-13 10:26:54,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:26:54,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:26:54,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:26:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:26:54,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-13 10:26:54,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:26:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-13 10:26:54,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823463763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:26:54,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:26:54,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-13 10:26:54,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965796416] [2022-07-13 10:26:54,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:26:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:26:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:26:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:26:54,920 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:54,988 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-07-13 10:26:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:26:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-07-13 10:26:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:54,991 INFO L225 Difference]: With dead ends: 82 [2022-07-13 10:26:54,992 INFO L226 Difference]: Without dead ends: 58 [2022-07-13 10:26:54,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:26:54,994 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:54,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:26:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-13 10:26:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-07-13 10:26:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-13 10:26:55,005 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-07-13 10:26:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:55,005 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-13 10:26:55,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-13 10:26:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 10:26:55,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:55,007 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:55,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:55,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:55,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash 161581377, now seen corresponding path program 4 times [2022-07-13 10:26:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:55,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609802681] [2022-07-13 10:26:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:55,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:26:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:55,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 10:26:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:55,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 10:26:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-13 10:26:55,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:55,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609802681] [2022-07-13 10:26:55,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609802681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:55,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198593542] [2022-07-13 10:26:55,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:26:55,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:55,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:55,404 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) [2022-07-13 10:26:55,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:26:55,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:26:55,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:26:55,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:26:55,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-13 10:26:55,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:26:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-13 10:26:55,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198593542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:26:55,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:26:55,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-07-13 10:26:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224911341] [2022-07-13 10:26:55,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:26:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:26:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:26:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:26:55,604 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:55,668 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-13 10:26:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:26:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-07-13 10:26:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:55,672 INFO L225 Difference]: With dead ends: 100 [2022-07-13 10:26:55,672 INFO L226 Difference]: Without dead ends: 68 [2022-07-13 10:26:55,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:26:55,676 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:55,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:26:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-13 10:26:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-13 10:26:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-13 10:26:55,694 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-07-13 10:26:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:55,694 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-13 10:26:55,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-13 10:26:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-13 10:26:55,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:55,701 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:55,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:55,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:55,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1010910917, now seen corresponding path program 5 times [2022-07-13 10:26:55,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:55,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065085853] [2022-07-13 10:26:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:55,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:56,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:26:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:56,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 10:26:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 10:26:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-07-13 10:26:56,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:56,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065085853] [2022-07-13 10:26:56,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065085853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:56,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562312085] [2022-07-13 10:26:56,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:26:56,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:56,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:56,075 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) [2022-07-13 10:26:56,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:26:56,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-13 10:26:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:26:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:26:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-13 10:26:56,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:26:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-13 10:26:56,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562312085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:26:56,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:26:56,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-07-13 10:26:56,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366444309] [2022-07-13 10:26:56,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:26:56,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 10:26:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 10:26:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:26:56,952 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:57,032 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-07-13 10:26:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 10:26:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-07-13 10:26:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:57,034 INFO L225 Difference]: With dead ends: 126 [2022-07-13 10:26:57,034 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 10:26:57,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:26:57,036 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:57,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:26:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 10:26:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-13 10:26:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-13 10:26:57,051 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-07-13 10:26:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:57,053 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-13 10:26:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-13 10:26:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-13 10:26:57,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:57,059 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:57,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:57,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-13 10:26:57,264 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1009519917, now seen corresponding path program 6 times [2022-07-13 10:26:57,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:57,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771457518] [2022-07-13 10:26:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:57,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:57,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 10:26:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:57,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 10:26:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:57,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-13 10:26:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-13 10:26:57,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771457518] [2022-07-13 10:26:57,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771457518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746818114] [2022-07-13 10:26:57,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:26:57,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:57,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:57,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:26:57,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:26:57,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-13 10:26:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:26:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:26:57,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-07-13 10:26:57,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:26:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-07-13 10:26:58,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746818114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:26:58,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:26:58,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-07-13 10:26:58,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635612537] [2022-07-13 10:26:58,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:26:58,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 10:26:58,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 10:26:58,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:26:58,071 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:58,152 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-07-13 10:26:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 10:26:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-07-13 10:26:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:58,154 INFO L225 Difference]: With dead ends: 160 [2022-07-13 10:26:58,154 INFO L226 Difference]: Without dead ends: 104 [2022-07-13 10:26:58,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:26:58,158 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:58,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:26:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-13 10:26:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-07-13 10:26:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-07-13 10:26:58,168 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-07-13 10:26:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:58,168 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-07-13 10:26:58,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:26:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-07-13 10:26:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-13 10:26:58,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:58,170 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:58,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:58,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:58,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -794036833, now seen corresponding path program 7 times [2022-07-13 10:26:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:58,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208196180] [2022-07-13 10:26:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:58,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 10:26:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:58,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-13 10:26:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:58,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-13 10:26:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:26:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:58,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208196180] [2022-07-13 10:26:58,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208196180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:58,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049412628] [2022-07-13 10:26:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:26:58,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:58,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:26:58,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:26:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:26:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:26:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:26:58,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:26:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:26:59,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049412628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:26:59,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:26:59,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-13 10:26:59,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739274517] [2022-07-13 10:26:59,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:26:59,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 10:26:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:26:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 10:26:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:26:59,092 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:26:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:26:59,168 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-07-13 10:26:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 10:26:59,168 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-07-13 10:26:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:26:59,169 INFO L225 Difference]: With dead ends: 207 [2022-07-13 10:26:59,169 INFO L226 Difference]: Without dead ends: 135 [2022-07-13 10:26:59,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:26:59,171 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:26:59,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:26:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-13 10:26:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-13 10:26:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:26:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-07-13 10:26:59,177 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-07-13 10:26:59,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:26:59,178 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-07-13 10:26:59,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:26:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-07-13 10:26:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-13 10:26:59,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:26:59,180 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:26:59,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:26:59,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:26:59,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:26:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:26:59,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1814541889, now seen corresponding path program 8 times [2022-07-13 10:26:59,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:26:59,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791379688] [2022-07-13 10:26:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:26:59,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:26:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:59,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:26:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:59,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 10:26:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:59,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-07-13 10:26:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:26:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:26:59,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:26:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791379688] [2022-07-13 10:26:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791379688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:26:59,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296078057] [2022-07-13 10:26:59,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:26:59,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:26:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:59,932 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:26:59,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:27:00,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:27:00,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 10:27:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:00,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:01,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296078057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:01,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:01,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-07-13 10:27:01,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470094655] [2022-07-13 10:27:01,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:01,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-13 10:27:01,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:01,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-13 10:27:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:27:01,354 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:01,511 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2022-07-13 10:27:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-13 10:27:01,511 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-07-13 10:27:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:01,513 INFO L225 Difference]: With dead ends: 271 [2022-07-13 10:27:01,513 INFO L226 Difference]: Without dead ends: 199 [2022-07-13 10:27:01,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:27:01,515 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:01,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:27:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-13 10:27:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-07-13 10:27:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-07-13 10:27:01,522 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2022-07-13 10:27:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:01,523 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-07-13 10:27:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-07-13 10:27:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-13 10:27:01,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:01,526 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:01,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 10:27:01,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 10:27:01,743 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:01,744 INFO L85 PathProgramCache]: Analyzing trace with hash 438792703, now seen corresponding path program 9 times [2022-07-13 10:27:01,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:01,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092152636] [2022-07-13 10:27:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:01,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-13 10:27:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-07-13 10:27:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-07-13 10:27:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092152636] [2022-07-13 10:27:03,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092152636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985163994] [2022-07-13 10:27:03,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:27:03,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:03,324 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:03,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:27:05,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-13 10:27:05,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:27:05,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-07-13 10:27:05,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-07-13 10:27:06,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985163994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:06,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:06,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2022-07-13 10:27:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549701362] [2022-07-13 10:27:06,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:06,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-13 10:27:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:06,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-13 10:27:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-07-13 10:27:06,548 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:06,767 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2022-07-13 10:27:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-13 10:27:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 264 [2022-07-13 10:27:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:06,773 INFO L225 Difference]: With dead ends: 306 [2022-07-13 10:27:06,773 INFO L226 Difference]: Without dead ends: 234 [2022-07-13 10:27:06,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-07-13 10:27:06,776 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:06,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 122 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:27:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-13 10:27:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-07-13 10:27:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-07-13 10:27:06,784 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2022-07-13 10:27:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:06,785 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-07-13 10:27:06,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-07-13 10:27:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-07-13 10:27:06,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:06,790 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:06,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:07,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 10:27:07,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1765547295, now seen corresponding path program 10 times [2022-07-13 10:27:07,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:07,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588343255] [2022-07-13 10:27:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:07,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:08,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-07-13 10:27:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:08,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-07-13 10:27:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:08,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2022-07-13 10:27:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2022-07-13 10:27:08,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:08,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588343255] [2022-07-13 10:27:08,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588343255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:08,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058394049] [2022-07-13 10:27:08,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:27:08,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:08,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:08,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:08,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:27:08,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:27:08,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:08,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 10:27:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2022-07-13 10:27:09,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 1864 proven. 2764 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-07-13 10:27:11,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058394049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:11,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:11,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 33] total 128 [2022-07-13 10:27:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705542195] [2022-07-13 10:27:11,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:11,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-13 10:27:11,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-13 10:27:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-07-13 10:27:11,469 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:11,772 INFO L93 Difference]: Finished difference Result 404 states and 447 transitions. [2022-07-13 10:27:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-07-13 10:27:11,778 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 362 [2022-07-13 10:27:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:11,779 INFO L225 Difference]: With dead ends: 404 [2022-07-13 10:27:11,779 INFO L226 Difference]: Without dead ends: 300 [2022-07-13 10:27:11,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-07-13 10:27:11,783 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:11,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 202 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:27:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-13 10:27:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-07-13 10:27:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2022-07-13 10:27:11,792 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 362 [2022-07-13 10:27:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:11,793 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2022-07-13 10:27:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2022-07-13 10:27:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-07-13 10:27:11,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:11,803 INFO L195 NwaCegarLoop]: trace histogram [186, 186, 64, 64, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:11,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:12,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 10:27:12,028 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1972129571, now seen corresponding path program 11 times [2022-07-13 10:27:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:12,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313195327] [2022-07-13 10:27:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:13,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-13 10:27:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-07-13 10:27:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:13,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2022-07-13 10:27:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39275 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 35179 trivial. 0 not checked. [2022-07-13 10:27:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313195327] [2022-07-13 10:27:13,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313195327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911508722] [2022-07-13 10:27:13,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:27:13,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:13,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:13,752 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:13,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process