./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/Flip2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 35987657 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/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/Flip2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-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(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 01:30:16,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 01:30:16,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 01:30:16,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 01:30:16,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 01:30:16,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 01:30:16,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 01:30:16,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 01:30:16,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 01:30:16,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 01:30:16,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 01:30:16,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 01:30:16,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 01:30:16,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 01:30:16,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 01:30:16,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 01:30:16,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 01:30:16,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 01:30:16,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 01:30:16,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 01:30:16,175 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 01:30:16,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 01:30:16,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 01:30:16,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 01:30:16,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 01:30:16,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 01:30:16,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 01:30:16,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 01:30:16,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 01:30:16,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 01:30:16,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 01:30:16,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 01:30:16,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 01:30:16,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 01:30:16,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 01:30:16,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 01:30:16,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 01:30:16,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 01:30:16,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 01:30:16,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 01:30:16,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 01:30:16,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 01:30:16,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-07-22 01:30:16,218 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 01:30:16,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 01:30:16,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 01:30:16,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 01:30:16,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 01:30:16,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 01:30:16,221 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 01:30:16,221 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 01:30:16,221 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 01:30:16,222 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 01:30:16,222 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 01:30:16,222 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 01:30:16,222 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 01:30:16,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 01:30:16,226 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 01:30:16,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 01:30:16,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 01:30:16,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 01:30:16,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 01:30:16,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 01:30:16,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 01:30:16,227 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 01:30:16,227 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 01:30:16,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 01:30:16,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 01:30:16,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 01:30:16,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 01:30:16,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 01:30:16,228 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 01:30:16,228 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac [2022-07-22 01:30:16,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 01:30:16,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 01:30:16,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 01:30:16,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 01:30:16,529 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 01:30:16,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/Flip2.c [2022-07-22 01:30:16,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e522de1/1ecc3adb34b94113b1455307ca51b4e8/FLAG4f5f1eac7 [2022-07-22 01:30:16,933 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 01:30:16,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/Flip2.c [2022-07-22 01:30:16,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e522de1/1ecc3adb34b94113b1455307ca51b4e8/FLAG4f5f1eac7 [2022-07-22 01:30:16,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e522de1/1ecc3adb34b94113b1455307ca51b4e8 [2022-07-22 01:30:16,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 01:30:16,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 01:30:16,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 01:30:16,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 01:30:16,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 01:30:16,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:30:16" (1/1) ... [2022-07-22 01:30:16,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db594d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:16, skipping insertion in model container [2022-07-22 01:30:16,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:30:16" (1/1) ... [2022-07-22 01:30:16,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 01:30:16,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 01:30:17,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:30:17,090 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 01:30:17,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:30:17,131 INFO L208 MainTranslator]: Completed translation [2022-07-22 01:30:17,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17 WrapperNode [2022-07-22 01:30:17,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 01:30:17,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 01:30:17,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 01:30:17,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 01:30:17,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,157 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-07-22 01:30:17,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 01:30:17,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 01:30:17,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 01:30:17,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 01:30:17,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 01:30:17,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 01:30:17,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 01:30:17,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 01:30:17,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (1/1) ... [2022-07-22 01:30:17,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:17,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:17,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:17,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-22 01:30:17,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 01:30:17,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 01:30:17,296 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 01:30:17,298 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 01:30:17,380 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 01:30:17,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 01:30:17,385 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 01:30:17,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:30:17 BoogieIcfgContainer [2022-07-22 01:30:17,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 01:30:17,388 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 01:30:17,388 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 01:30:17,390 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 01:30:17,391 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:30:17,391 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 01:30:16" (1/3) ... [2022-07-22 01:30:17,392 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b7f6ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:30:17, skipping insertion in model container [2022-07-22 01:30:17,392 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:30:17,392 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:30:17" (2/3) ... [2022-07-22 01:30:17,393 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b7f6ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:30:17, skipping insertion in model container [2022-07-22 01:30:17,393 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:30:17,393 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:30:17" (3/3) ... [2022-07-22 01:30:17,394 INFO L354 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2022-07-22 01:30:17,443 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 01:30:17,443 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-22 01:30:17,444 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 01:30:17,444 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 01:30:17,444 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 01:30:17,444 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-22 01:30:17,444 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 01:30:17,444 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 01:30:17,448 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:17,465 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-07-22 01:30:17,465 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:30:17,465 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:30:17,471 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-22 01:30:17,472 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-07-22 01:30:17,472 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 01:30:17,472 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:17,473 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-07-22 01:30:17,473 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:30:17,473 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:30:17,474 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-22 01:30:17,474 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-07-22 01:30:17,479 INFO L752 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 2#L19-2true [2022-07-22 01:30:17,480 INFO L754 eck$LassoCheckResult]: Loop: 2#L19-2true assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 9#L14true assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 2#L19-2true [2022-07-22 01:30:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-07-22 01:30:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:17,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570484335] [2022-07-22 01:30:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:17,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:17,548 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:17,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 1 times [2022-07-22 01:30:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081396283] [2022-07-22 01:30:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:17,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:17,597 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:17,607 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-07-22 01:30:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:17,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133407127] [2022-07-22 01:30:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:17,622 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:17,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:17,718 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:17,719 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:17,719 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:17,719 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:17,719 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:30:17,719 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:17,720 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:17,720 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:17,720 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2022-07-22 01:30:17,720 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:17,720 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:17,743 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:17,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:17,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:17,823 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:17,824 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:30:17,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:17,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:17,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-07-22 01:30:17,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:17,864 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:17,877 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:17,877 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:17,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2022-07-22 01:30:17,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:17,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:17,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:17,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-07-22 01:30:17,900 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:17,900 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:17,920 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:17,920 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:17,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:17,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:17,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:17,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:17,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-07-22 01:30:17,943 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:17,943 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:17,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2022-07-22 01:30:17,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:17,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:17,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-07-22 01:30:17,988 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:30:17,988 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:18,179 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:30:18,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,184 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:18,184 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:18,184 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:18,184 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:18,184 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:30:18,184 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,184 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:18,184 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:18,184 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2022-07-22 01:30:18,185 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:18,185 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:18,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,257 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:18,261 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:30:18,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,271 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:18,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-07-22 01:30:18,277 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:18,277 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:18,277 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:18,277 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:18,281 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:30:18,281 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:30:18,294 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:30:18,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-07-22 01:30:18,316 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:18,321 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:18,321 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:18,321 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:18,321 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:18,324 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:30:18,324 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:30:18,331 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:30:18,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2022-07-22 01:30:18,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-07-22 01:30:18,349 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:18,354 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:18,355 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:30:18,355 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:18,355 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:18,355 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:18,357 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:30:18,357 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:30:18,375 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:30:18,377 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 01:30:18,377 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 01:30:18,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-07-22 01:30:18,381 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:30:18,381 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:30:18,381 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:30:18,382 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2022-07-22 01:30:18,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,399 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:30:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:18,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:30:18,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:18,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 01:30:18,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:30:18,483 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-07-22 01:30:18,484 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:18,516 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 31 states and 44 transitions. Complement of second has 8 states. [2022-07-22 01:30:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 01:30:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2022-07-22 01:30:18,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 2 letters. Loop has 2 letters. [2022-07-22 01:30:18,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:18,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 4 letters. Loop has 2 letters. [2022-07-22 01:30:18,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:18,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 2 letters. Loop has 4 letters. [2022-07-22 01:30:18,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:18,526 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 44 transitions. [2022-07-22 01:30:18,531 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2022-07-22 01:30:18,543 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 14 states and 20 transitions. [2022-07-22 01:30:18,543 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2022-07-22 01:30:18,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2022-07-22 01:30:18,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2022-07-22 01:30:18,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:30:18,545 INFO L369 hiAutomatonCegarLoop]: Abstraction has 14 states and 20 transitions. [2022-07-22 01:30:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2022-07-22 01:30:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-07-22 01:30:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-07-22 01:30:18,565 INFO L392 hiAutomatonCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-07-22 01:30:18,565 INFO L374 stractBuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-07-22 01:30:18,565 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-22 01:30:18,565 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 19 transitions. [2022-07-22 01:30:18,566 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2022-07-22 01:30:18,566 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:30:18,566 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:30:18,567 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 01:30:18,567 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:30:18,567 INFO L752 eck$LassoCheckResult]: Stem: 84#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 85#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 86#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 81#L14 [2022-07-22 01:30:18,568 INFO L754 eck$LassoCheckResult]: Loop: 81#L14 assume !(main_~i~0#1 < main_~j~0#1); 90#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 80#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 81#L14 [2022-07-22 01:30:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2022-07-22 01:30:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806643930] [2022-07-22 01:30:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:18,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:18,575 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:18,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash 45829, now seen corresponding path program 1 times [2022-07-22 01:30:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:18,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258192471] [2022-07-22 01:30:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:18,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:18,598 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:18,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash 889694462, now seen corresponding path program 1 times [2022-07-22 01:30:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:18,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826349587] [2022-07-22 01:30:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:18,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:18,620 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:18,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:18,660 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:18,660 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:18,660 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:18,660 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:18,660 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:30:18,660 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,660 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:18,660 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:18,661 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2022-07-22 01:30:18,661 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:18,661 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:18,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,708 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:18,709 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:30:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-07-22 01:30:18,712 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:18,713 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:18,747 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:18,748 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:18,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-07-22 01:30:18,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:18,766 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:18,776 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:18,776 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:18,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-07-22 01:30:18,795 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:18,795 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:18,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:18,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-07-22 01:30:18,828 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:30:18,828 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:18,929 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:30:18,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:18,933 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:18,933 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:18,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:18,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:18,933 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:30:18,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:18,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:18,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2022-07-22 01:30:18,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:18,933 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:18,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:18,974 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:18,975 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:30:18,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:18,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:18,991 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,036 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:19,042 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:19,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:19,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:19,042 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:19,044 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:30:19,044 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:30:19,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-07-22 01:30:19,049 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:30:19,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:19,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,069 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-07-22 01:30:19,070 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:19,076 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:19,076 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:19,076 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:19,076 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:19,085 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:30:19,085 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:30:19,120 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:30:19,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:19,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,156 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,167 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:19,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-07-22 01:30:19,173 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:19,174 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:30:19,174 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:19,174 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:19,174 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:19,175 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:30:19,175 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:30:19,177 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:30:19,181 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2022-07-22 01:30:19,181 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2022-07-22 01:30:19,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,182 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-07-22 01:30:19,231 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:30:19,231 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:30:19,231 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:30:19,231 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2022-07-22 01:30:19,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2022-07-22 01:30:19,249 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:30:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:19,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:30:19,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:19,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:30:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:30:19,329 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-07-22 01:30:19,329 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:19,361 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 35 states and 50 transitions. Complement of second has 7 states. [2022-07-22 01:30:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 01:30:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-07-22 01:30:19,363 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 3 letters. [2022-07-22 01:30:19,363 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:19,363 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 6 letters. Loop has 3 letters. [2022-07-22 01:30:19,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:19,364 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 6 letters. [2022-07-22 01:30:19,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:19,364 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 50 transitions. [2022-07-22 01:30:19,365 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2022-07-22 01:30:19,365 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 31 states and 45 transitions. [2022-07-22 01:30:19,365 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2022-07-22 01:30:19,366 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2022-07-22 01:30:19,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 45 transitions. [2022-07-22 01:30:19,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:30:19,366 INFO L369 hiAutomatonCegarLoop]: Abstraction has 31 states and 45 transitions. [2022-07-22 01:30:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 45 transitions. [2022-07-22 01:30:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-07-22 01:30:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 38 transitions. [2022-07-22 01:30:19,372 INFO L392 hiAutomatonCegarLoop]: Abstraction has 25 states and 38 transitions. [2022-07-22 01:30:19,372 INFO L374 stractBuchiCegarLoop]: Abstraction has 25 states and 38 transitions. [2022-07-22 01:30:19,372 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-22 01:30:19,372 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 38 transitions. [2022-07-22 01:30:19,373 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2022-07-22 01:30:19,373 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:30:19,373 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:30:19,373 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-22 01:30:19,374 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:30:19,374 INFO L752 eck$LassoCheckResult]: Stem: 174#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 175#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 180#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 184#L14 assume !(main_~i~0#1 < main_~j~0#1); 176#L19 [2022-07-22 01:30:19,374 INFO L754 eck$LassoCheckResult]: Loop: 176#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 177#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 190#L14 assume !(main_~i~0#1 < main_~j~0#1); 176#L19 [2022-07-22 01:30:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 925800, now seen corresponding path program 1 times [2022-07-22 01:30:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:19,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675701161] [2022-07-22 01:30:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:19,377 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:19,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash 48407, now seen corresponding path program 1 times [2022-07-22 01:30:19,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:19,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086300776] [2022-07-22 01:30:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:19,384 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:19,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1810722640, now seen corresponding path program 1 times [2022-07-22 01:30:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:19,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772888129] [2022-07-22 01:30:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:19,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:19,390 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:19,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:19,407 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:19,407 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:19,407 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:19,408 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:19,408 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:30:19,408 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,408 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:19,408 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:19,408 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2022-07-22 01:30:19,408 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:19,408 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:19,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:19,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:19,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:19,437 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:19,437 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:30:19,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,439 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-07-22 01:30:19,441 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:19,441 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:19,456 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:19,456 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:19,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:19,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-07-22 01:30:19,492 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:19,492 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:19,514 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:19,514 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:19,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2022-07-22 01:30:19,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,544 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-07-22 01:30:19,546 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:19,546 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:19,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2022-07-22 01:30:19,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,577 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-07-22 01:30:19,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:30:19,579 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:19,697 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:30:19,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:19,703 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:19,703 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:19,703 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:19,703 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:19,703 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:30:19,703 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,703 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:19,703 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:19,703 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2022-07-22 01:30:19,703 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:19,703 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:19,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:19,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:19,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:19,736 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:19,737 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:30:19,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,738 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-07-22 01:30:19,740 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:19,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:19,746 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:19,746 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:19,751 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:19,759 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:30:19,759 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:30:19,788 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:30:19,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:19,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:19,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,804 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-07-22 01:30:19,806 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:19,817 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:19,817 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:30:19,817 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:19,817 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:19,817 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:19,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:30:19,818 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:30:19,839 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:30:19,843 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2022-07-22 01:30:19,843 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 01:30:19,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:19,853 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:19,859 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:30:19,859 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:30:19,859 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:30:19,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-07-22 01:30:19,859 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~i~0#1 - 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2022-07-22 01:30:19,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:19,876 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:30:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:30:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:19,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:30:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:30:19,912 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-07-22 01:30:19,912 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 38 transitions. cyclomatic complexity: 19 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:19,938 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 38 transitions. cyclomatic complexity: 19. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 63 states and 92 transitions. Complement of second has 5 states. [2022-07-22 01:30:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-07-22 01:30:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2022-07-22 01:30:19,941 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2022-07-22 01:30:19,941 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:19,941 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2022-07-22 01:30:19,941 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:19,941 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2022-07-22 01:30:19,942 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:19,942 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 92 transitions. [2022-07-22 01:30:19,946 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2022-07-22 01:30:19,949 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 56 states and 81 transitions. [2022-07-22 01:30:19,949 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-22 01:30:19,949 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2022-07-22 01:30:19,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 81 transitions. [2022-07-22 01:30:19,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:30:19,949 INFO L369 hiAutomatonCegarLoop]: Abstraction has 56 states and 81 transitions. [2022-07-22 01:30:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 81 transitions. [2022-07-22 01:30:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2022-07-22 01:30:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 61 transitions. [2022-07-22 01:30:19,955 INFO L392 hiAutomatonCegarLoop]: Abstraction has 42 states and 61 transitions. [2022-07-22 01:30:19,955 INFO L374 stractBuchiCegarLoop]: Abstraction has 42 states and 61 transitions. [2022-07-22 01:30:19,955 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-22 01:30:19,955 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 61 transitions. [2022-07-22 01:30:19,957 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2022-07-22 01:30:19,957 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:30:19,958 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:30:19,958 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2022-07-22 01:30:19,958 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-07-22 01:30:19,958 INFO L752 eck$LassoCheckResult]: Stem: 304#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 305#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 309#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 332#L14 assume !(main_~i~0#1 < main_~j~0#1); 306#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 307#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 318#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 315#L19-2 [2022-07-22 01:30:19,958 INFO L754 eck$LassoCheckResult]: Loop: 315#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 325#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 315#L19-2 [2022-07-22 01:30:19,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1810722638, now seen corresponding path program 1 times [2022-07-22 01:30:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:19,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274320095] [2022-07-22 01:30:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:30:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:30:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274320095] [2022-07-22 01:30:20,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274320095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 01:30:20,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 01:30:20,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 01:30:20,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949303128] [2022-07-22 01:30:20,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 01:30:20,007 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 01:30:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:20,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 2 times [2022-07-22 01:30:20,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:20,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119839279] [2022-07-22 01:30:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:20,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:20,016 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:20,023 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:20,048 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:20,048 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:20,048 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:20,048 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:20,048 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:30:20,048 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:20,048 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:20,048 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2022-07-22 01:30:20,048 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:20,048 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:20,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,095 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:20,095 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:30:20,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,111 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-07-22 01:30:20,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:20,114 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:20,130 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:20,130 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:20,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:20,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,147 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-07-22 01:30:20,149 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:20,149 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:20,161 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:30:20,161 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:30:20,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2022-07-22 01:30:20,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,178 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-07-22 01:30:20,180 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:20,180 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:20,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2022-07-22 01:30:20,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,209 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-07-22 01:30:20,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:30:20,211 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:20,410 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:30:20,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2022-07-22 01:30:20,414 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:20,414 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:20,414 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:20,414 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:20,414 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:30:20,414 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,414 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:20,415 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:20,415 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2022-07-22 01:30:20,415 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:20,415 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:20,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,476 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:20,476 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:30:20,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,477 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-07-22 01:30:20,480 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:20,485 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:20,485 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:30:20,486 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:20,486 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:20,486 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:20,487 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:30:20,487 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:30:20,505 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:30:20,514 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:30:20,514 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 01:30:20,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,521 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2022-07-22 01:30:20,522 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:30:20,522 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:30:20,522 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:30:20,522 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2022-07-22 01:30:20,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2022-07-22 01:30:20,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:20,540 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:30:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:30:20,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:20,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 01:30:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:30:20,585 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-07-22 01:30:20,585 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 61 transitions. cyclomatic complexity: 29 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:20,596 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 61 transitions. cyclomatic complexity: 29. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 74 states and 105 transitions. Complement of second has 7 states. [2022-07-22 01:30:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 01:30:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2022-07-22 01:30:20,597 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 7 letters. Loop has 2 letters. [2022-07-22 01:30:20,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:20,597 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 9 letters. Loop has 2 letters. [2022-07-22 01:30:20,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:20,597 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-22 01:30:20,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:20,597 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 105 transitions. [2022-07-22 01:30:20,598 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2022-07-22 01:30:20,599 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 58 states and 84 transitions. [2022-07-22 01:30:20,599 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2022-07-22 01:30:20,599 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2022-07-22 01:30:20,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 84 transitions. [2022-07-22 01:30:20,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:30:20,599 INFO L369 hiAutomatonCegarLoop]: Abstraction has 58 states and 84 transitions. [2022-07-22 01:30:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 84 transitions. [2022-07-22 01:30:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-07-22 01:30:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 42 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2022-07-22 01:30:20,601 INFO L392 hiAutomatonCegarLoop]: Abstraction has 43 states and 63 transitions. [2022-07-22 01:30:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:30:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 01:30:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 01:30:20,604 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:30:20,615 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-22 01:30:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 01:30:20,615 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 69 transitions. [2022-07-22 01:30:20,616 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 14 [2022-07-22 01:30:20,616 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 45 states and 62 transitions. [2022-07-22 01:30:20,616 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2022-07-22 01:30:20,616 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2022-07-22 01:30:20,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 62 transitions. [2022-07-22 01:30:20,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:30:20,617 INFO L369 hiAutomatonCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-07-22 01:30:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 62 transitions. [2022-07-22 01:30:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-07-22 01:30:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 40 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-07-22 01:30:20,619 INFO L392 hiAutomatonCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-07-22 01:30:20,619 INFO L374 stractBuchiCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-07-22 01:30:20,619 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-22 01:30:20,619 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 58 transitions. [2022-07-22 01:30:20,619 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 14 [2022-07-22 01:30:20,619 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:30:20,619 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:30:20,619 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2022-07-22 01:30:20,620 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:30:20,620 INFO L752 eck$LassoCheckResult]: Stem: 563#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 564#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 568#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 574#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 598#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 569#L14 assume !(main_~i~0#1 < main_~j~0#1); 570#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 566#L19-2 [2022-07-22 01:30:20,620 INFO L754 eck$LassoCheckResult]: Loop: 566#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 597#L14 assume !(main_~i~0#1 < main_~j~0#1); 565#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 566#L19-2 [2022-07-22 01:30:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1810655530, now seen corresponding path program 1 times [2022-07-22 01:30:20,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:20,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570194467] [2022-07-22 01:30:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:20,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:30:20,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:30:20,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570194467] [2022-07-22 01:30:20,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570194467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 01:30:20,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 01:30:20,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 01:30:20,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257847582] [2022-07-22 01:30:20,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 01:30:20,635 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 01:30:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 40879, now seen corresponding path program 2 times [2022-07-22 01:30:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:20,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124103621] [2022-07-22 01:30:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:20,637 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:20,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:20,656 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:20,656 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:20,656 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:20,656 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:20,656 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:30:20,656 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,656 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:20,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:20,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2022-07-22 01:30:20,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:20,656 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:20,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,686 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:20,687 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:30:20,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,692 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2022-07-22 01:30:20,694 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:30:20,694 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:20,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:20,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,733 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2022-07-22 01:30:20,735 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:30:20,735 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:30:20,819 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:30:20,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2022-07-22 01:30:20,823 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:30:20,823 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:30:20,823 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:30:20,823 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:30:20,823 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:30:20,823 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,823 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:30:20,823 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:30:20,823 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2022-07-22 01:30:20,823 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:30:20,823 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:30:20,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:30:20,867 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:30:20,867 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:30:20,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,868 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2022-07-22 01:30:20,870 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:20,876 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:20,876 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:20,876 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:20,876 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:20,877 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:30:20,878 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:30:20,881 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:30:20,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:20,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,901 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-07-22 01:30:20,904 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:30:20,909 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:30:20,910 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:30:20,910 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:30:20,910 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:30:20,910 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:30:20,911 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:30:20,911 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:30:20,912 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:30:20,915 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2022-07-22 01:30:20,915 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2022-07-22 01:30:20,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:30:20,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:30:20,917 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:30:20,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2022-07-22 01:30:20,918 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:30:20,918 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:30:20,918 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:30:20,919 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2022-07-22 01:30:20,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:20,936 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:30:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:30:20,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:30:20,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:30:20,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:30:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:30:20,993 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-07-22 01:30:20,993 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 58 transitions. cyclomatic complexity: 25 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:21,004 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 58 transitions. cyclomatic complexity: 25. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 74 states and 102 transitions. Complement of second has 5 states. [2022-07-22 01:30:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-07-22 01:30:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2022-07-22 01:30:21,005 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2022-07-22 01:30:21,006 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:21,006 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 3 letters. [2022-07-22 01:30:21,006 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:21,006 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 6 letters. [2022-07-22 01:30:21,006 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:30:21,006 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 102 transitions. [2022-07-22 01:30:21,007 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2022-07-22 01:30:21,007 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 57 states and 79 transitions. [2022-07-22 01:30:21,007 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2022-07-22 01:30:21,007 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2022-07-22 01:30:21,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 79 transitions. [2022-07-22 01:30:21,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:30:21,007 INFO L369 hiAutomatonCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-07-22 01:30:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 79 transitions. [2022-07-22 01:30:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-07-22 01:30:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-07-22 01:30:21,010 INFO L392 hiAutomatonCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-07-22 01:30:21,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:30:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 01:30:21,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 01:30:21,010 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:30:21,017 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-07-22 01:30:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 01:30:21,018 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 66 transitions. [2022-07-22 01:30:21,019 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2022-07-22 01:30:21,019 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 47 states and 61 transitions. [2022-07-22 01:30:21,019 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2022-07-22 01:30:21,019 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2022-07-22 01:30:21,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 61 transitions. [2022-07-22 01:30:21,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:30:21,019 INFO L369 hiAutomatonCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-07-22 01:30:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 61 transitions. [2022-07-22 01:30:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-07-22 01:30:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:30:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-07-22 01:30:21,022 INFO L392 hiAutomatonCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-07-22 01:30:21,023 INFO L374 stractBuchiCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-07-22 01:30:21,023 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-22 01:30:21,023 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 47 transitions. [2022-07-22 01:30:21,024 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2022-07-22 01:30:21,024 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:30:21,024 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:30:21,024 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2022-07-22 01:30:21,024 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2022-07-22 01:30:21,024 INFO L752 eck$LassoCheckResult]: Stem: 828#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 829#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 830#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 841#L14 assume !(main_~i~0#1 < main_~j~0#1); 837#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 852#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 835#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 824#L19-2 [2022-07-22 01:30:21,025 INFO L754 eck$LassoCheckResult]: Loop: 824#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 825#L14 assume !(main_~i~0#1 < main_~j~0#1); 831#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 832#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 858#L14 assume !(main_~i~0#1 < main_~j~0#1); 855#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 856#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 857#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 824#L19-2 [2022-07-22 01:30:21,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1810724560, now seen corresponding path program 2 times [2022-07-22 01:30:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:21,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882571016] [2022-07-22 01:30:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:21,030 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:21,032 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2053356838, now seen corresponding path program 1 times [2022-07-22 01:30:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:21,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79326544] [2022-07-22 01:30:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:21,038 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:21,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:30:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash 399570165, now seen corresponding path program 1 times [2022-07-22 01:30:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:30:21,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33372472] [2022-07-22 01:30:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:30:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:30:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:21,049 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:30:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:30:21,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:30:21,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:21,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2022-07-22 01:30:21,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 01:30:21 BoogieIcfgContainer [2022-07-22 01:30:21,186 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 01:30:21,187 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 01:30:21,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 01:30:21,187 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 01:30:21,187 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:30:17" (3/4) ... [2022-07-22 01:30:21,189 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-07-22 01:30:21,230 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 01:30:21,230 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 01:30:21,231 INFO L158 Benchmark]: Toolchain (without parser) took 4275.16ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 35.2MB in the beginning and 57.2MB in the end (delta: -22.0MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. [2022-07-22 01:30:21,231 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 56.6MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:30:21,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.41ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 41.0MB in the end (delta: -6.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-22 01:30:21,231 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.55ms. Allocated memory is still 56.6MB. Free memory was 41.0MB in the beginning and 39.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:30:21,232 INFO L158 Benchmark]: Boogie Preprocessor took 13.08ms. Allocated memory is still 56.6MB. Free memory was 39.7MB in the beginning and 38.8MB in the end (delta: 938.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 01:30:21,232 INFO L158 Benchmark]: RCFGBuilder took 214.75ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 30.9MB in the end (delta: 7.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 01:30:21,232 INFO L158 Benchmark]: BuchiAutomizer took 3798.29ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 30.8MB in the beginning and 59.3MB in the end (delta: -28.5MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2022-07-22 01:30:21,232 INFO L158 Benchmark]: Witness Printer took 43.77ms. Allocated memory is still 83.9MB. Free memory was 59.3MB in the beginning and 57.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 01:30:21,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 56.6MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.41ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 41.0MB in the end (delta: -6.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.55ms. Allocated memory is still 56.6MB. Free memory was 41.0MB in the beginning and 39.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.08ms. Allocated memory is still 56.6MB. Free memory was 39.7MB in the beginning and 38.8MB in the end (delta: 938.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 214.75ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 30.9MB in the end (delta: 7.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 3798.29ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 30.8MB in the beginning and 59.3MB in the end (delta: -28.5MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. * Witness Printer took 43.77ms. Allocated memory is still 83.9MB. Free memory was 59.3MB in the beginning and 57.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 5 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function j and consists of 5 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -1 * j + i and consists of 3 locations. One deterministic module has affine ranking function j and consists of 4 locations. One deterministic module has affine ranking function i and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 35 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.7s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 3.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 47 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 80 IncrementalHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 39 mSDtfsCounter, 80 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax176 hnf100 lsp57 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq148 hnf92 smp100 dnf100 smp100 tf109 neg96 sie114 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {j=1, i=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@46350f44=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@34ae1f67=0, t=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int j; [L8] int t; [L9] i = __VERIFIER_nondet_int() [L10] j = __VERIFIER_nondet_int() [L11] t = 0 [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t Loop: [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND TRUE i > j [L20] j = i [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-07-22 01:30:21,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)