./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loops/while_infinite_loop_3.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/loops/while_infinite_loop_3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d98e71a1078b2449fb14cda1ae702f0946372561 ....................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-8bd4bc6 [2020-07-29 02:06:37,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-29 02:06:37,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-29 02:06:37,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-29 02:06:37,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-29 02:06:37,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-29 02:06:37,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-29 02:06:37,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-29 02:06:37,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-29 02:06:37,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-29 02:06:37,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-29 02:06:37,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-29 02:06:37,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-29 02:06:37,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-29 02:06:37,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-29 02:06:37,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-29 02:06:37,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-29 02:06:37,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-29 02:06:37,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-29 02:06:37,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-29 02:06:37,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-29 02:06:37,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-29 02:06:37,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-29 02:06:37,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-29 02:06:37,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-29 02:06:37,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-29 02:06:37,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-29 02:06:37,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-29 02:06:37,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-29 02:06:37,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-29 02:06:37,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-29 02:06:37,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-29 02:06:37,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-29 02:06:37,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-29 02:06:37,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-29 02:06:37,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-29 02:06:37,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-29 02:06:37,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-29 02:06:37,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-29 02:06:37,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-29 02:06:37,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-29 02:06:37,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-07-29 02:06:37,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-29 02:06:37,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-29 02:06:37,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-29 02:06:37,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-29 02:06:37,320 INFO L138 SettingsManager]: * Use SBE=true [2020-07-29 02:06:37,320 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-29 02:06:37,320 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-07-29 02:06:37,320 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-29 02:06:37,321 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-29 02:06:37,321 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-29 02:06:37,321 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-29 02:06:37,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-29 02:06:37,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-29 02:06:37,322 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-29 02:06:37,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-29 02:06:37,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-29 02:06:37,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-29 02:06:37,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-07-29 02:06:37,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-07-29 02:06:37,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-07-29 02:06:37,324 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-29 02:06:37,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-29 02:06:37,325 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-29 02:06:37,325 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-29 02:06:37,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-07-29 02:06:37,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-29 02:06:37,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-29 02:06:37,326 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-29 02:06:37,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-29 02:06:37,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-29 02:06:37,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-29 02:06:37,327 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-07-29 02:06:37,328 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-07-29 02:06:37,328 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d98e71a1078b2449fb14cda1ae702f0946372561 [2020-07-29 02:06:37,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-29 02:06:37,659 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-29 02:06:37,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-29 02:06:37,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-29 02:06:37,664 INFO L275 PluginConnector]: CDTParser initialized [2020-07-29 02:06:37,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/while_infinite_loop_3.c [2020-07-29 02:06:37,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed5a73ea4/a76d6006b0444462a43b691f8575499d/FLAG061b49462 [2020-07-29 02:06:38,142 INFO L306 CDTParser]: Found 1 translation units. [2020-07-29 02:06:38,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/while_infinite_loop_3.c [2020-07-29 02:06:38,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed5a73ea4/a76d6006b0444462a43b691f8575499d/FLAG061b49462 [2020-07-29 02:06:38,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed5a73ea4/a76d6006b0444462a43b691f8575499d [2020-07-29 02:06:38,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-29 02:06:38,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-29 02:06:38,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-29 02:06:38,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-29 02:06:38,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-29 02:06:38,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b85cab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38, skipping insertion in model container [2020-07-29 02:06:38,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-29 02:06:38,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-29 02:06:38,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-29 02:06:38,760 INFO L203 MainTranslator]: Completed pre-run [2020-07-29 02:06:38,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-29 02:06:38,790 INFO L208 MainTranslator]: Completed translation [2020-07-29 02:06:38,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38 WrapperNode [2020-07-29 02:06:38,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-29 02:06:38,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-29 02:06:38,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-29 02:06:38,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-29 02:06:38,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-29 02:06:38,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-29 02:06:38,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-29 02:06:38,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-29 02:06:38,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... [2020-07-29 02:06:38,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-29 02:06:38,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-29 02:06:38,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-29 02:06:38,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-29 02:06:38,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-07-29 02:06:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-29 02:06:39,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-29 02:06:39,191 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-29 02:06:39,191 INFO L295 CfgBuilder]: Removed 12 assume(true) statements. [2020-07-29 02:06:39,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.07 02:06:39 BoogieIcfgContainer [2020-07-29 02:06:39,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-29 02:06:39,195 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-29 02:06:39,196 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-29 02:06:39,199 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-29 02:06:39,200 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-29 02:06:39,201 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.07 02:06:38" (1/3) ... [2020-07-29 02:06:39,202 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@68d4d89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.07 02:06:39, skipping insertion in model container [2020-07-29 02:06:39,202 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-29 02:06:39,202 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.07 02:06:38" (2/3) ... [2020-07-29 02:06:39,203 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@68d4d89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.07 02:06:39, skipping insertion in model container [2020-07-29 02:06:39,203 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-29 02:06:39,203 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.07 02:06:39" (3/3) ... [2020-07-29 02:06:39,205 INFO L371 chiAutomizerObserver]: Analyzing ICFG while_infinite_loop_3.c [2020-07-29 02:06:39,254 INFO L356 BuchiCegarLoop]: Interprodecural is true [2020-07-29 02:06:39,254 INFO L357 BuchiCegarLoop]: Hoare is false [2020-07-29 02:06:39,254 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-29 02:06:39,255 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-29 02:06:39,255 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-29 02:06:39,255 INFO L361 BuchiCegarLoop]: Difference is false [2020-07-29 02:06:39,255 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-29 02:06:39,256 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-07-29 02:06:39,269 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-07-29 02:06:39,295 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-07-29 02:06:39,296 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-07-29 02:06:39,296 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-07-29 02:06:39,303 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-07-29 02:06:39,303 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-07-29 02:06:39,303 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2020-07-29 02:06:39,304 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-07-29 02:06:39,307 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-07-29 02:06:39,307 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-07-29 02:06:39,307 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-07-29 02:06:39,308 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-07-29 02:06:39,308 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-07-29 02:06:39,316 INFO L794 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue ~x~0 := 0; 4#L-1true havoc main_#res; 12#L4-2true [2020-07-29 02:06:39,316 INFO L796 eck$LassoCheckResult]: Loop: 12#L4-2true assume !false; 14#L14loopEntrytrue assume false; 10#L14-2true __VERIFIER_assert_#in~cond := (if 0 == ~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 16#L4true assume !(0 == __VERIFIER_assert_~cond); 12#L4-2true [2020-07-29 02:06:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-29 02:06:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-07-29 02:06:39,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-29 02:06:39,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807787938] [2020-07-29 02:06:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-29 02:06:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,400 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,415 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-29 02:06:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-29 02:06:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1269327, now seen corresponding path program 1 times [2020-07-29 02:06:39,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-29 02:06:39,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032590842] [2020-07-29 02:06:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-29 02:06:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-29 02:06:39,459 INFO L280 TraceCheckUtils]: 0: Hoare triple {20#true} assume !false; {20#true} is VALID [2020-07-29 02:06:39,461 INFO L280 TraceCheckUtils]: 1: Hoare triple {20#true} assume false; {21#false} is VALID [2020-07-29 02:06:39,461 INFO L280 TraceCheckUtils]: 2: Hoare triple {21#false} __VERIFIER_assert_#in~cond := (if 0 == ~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {21#false} is VALID [2020-07-29 02:06:39,462 INFO L280 TraceCheckUtils]: 3: Hoare triple {21#false} assume !(0 == __VERIFIER_assert_~cond); {21#false} is VALID [2020-07-29 02:06:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-29 02:06:39,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032590842] [2020-07-29 02:06:39,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-29 02:06:39,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-29 02:06:39,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876027021] [2020-07-29 02:06:39,473 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-07-29 02:06:39,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-29 02:06:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-29 02:06:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-29 02:06:39,494 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-07-29 02:06:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-29 02:06:39,514 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2020-07-29 02:06:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-29 02:06:39,517 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-29 02:06:39,533 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-29 02:06:39,536 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 7 transitions. [2020-07-29 02:06:39,537 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-07-29 02:06:39,542 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 6 states and 6 transitions. [2020-07-29 02:06:39,543 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-07-29 02:06:39,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-07-29 02:06:39,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 6 transitions. [2020-07-29 02:06:39,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-07-29 02:06:39,545 INFO L688 BuchiCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-07-29 02:06:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 6 transitions. [2020-07-29 02:06:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-07-29 02:06:39,578 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-29 02:06:39,579 INFO L82 GeneralOperation]: Start isEquivalent. First operand 6 states and 6 transitions. Second operand 6 states. [2020-07-29 02:06:39,579 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states and 6 transitions. Second operand 6 states. [2020-07-29 02:06:39,581 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2020-07-29 02:06:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-29 02:06:39,583 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2020-07-29 02:06:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-07-29 02:06:39,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-29 02:06:39,584 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-29 02:06:39,584 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states and 6 transitions. [2020-07-29 02:06:39,584 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states and 6 transitions. [2020-07-29 02:06:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-29 02:06:39,586 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2020-07-29 02:06:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-07-29 02:06:39,586 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-29 02:06:39,586 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-29 02:06:39,586 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-29 02:06:39,587 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-29 02:06:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-29 02:06:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-07-29 02:06:39,589 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-07-29 02:06:39,590 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-07-29 02:06:39,590 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2020-07-29 02:06:39,590 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 6 transitions. [2020-07-29 02:06:39,590 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-07-29 02:06:39,590 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-07-29 02:06:39,591 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-07-29 02:06:39,591 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-07-29 02:06:39,591 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-07-29 02:06:39,591 INFO L794 eck$LassoCheckResult]: Stem: 31#ULTIMATE.startENTRY ~x~0 := 0; 29#L-1 havoc main_#res; 30#L4-2 [2020-07-29 02:06:39,592 INFO L796 eck$LassoCheckResult]: Loop: 30#L4-2 assume !false; 34#L14loopEntry assume !false;~x~0 := 0; 32#L14-2 __VERIFIER_assert_#in~cond := (if 0 == ~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 33#L4 assume !(0 == __VERIFIER_assert_~cond); 30#L4-2 [2020-07-29 02:06:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-29 02:06:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2020-07-29 02:06:39,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-29 02:06:39,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380123455] [2020-07-29 02:06:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-29 02:06:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,596 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,599 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-29 02:06:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-29 02:06:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1271249, now seen corresponding path program 1 times [2020-07-29 02:06:39,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-29 02:06:39,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361086656] [2020-07-29 02:06:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-29 02:06:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,612 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,620 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-29 02:06:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-29 02:06:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash 889698451, now seen corresponding path program 1 times [2020-07-29 02:06:39,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-29 02:06:39,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500301368] [2020-07-29 02:06:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-29 02:06:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,629 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-29 02:06:39,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-29 02:06:39,636 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-29 02:06:39,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.07 02:06:39 BoogieIcfgContainer [2020-07-29 02:06:39,750 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-07-29 02:06:39,750 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-29 02:06:39,750 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-29 02:06:39,751 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-29 02:06:39,751 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.07 02:06:39" (3/4) ... [2020-07-29 02:06:39,754 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-07-29 02:06:39,795 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-29 02:06:39,796 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-29 02:06:39,799 INFO L168 Benchmark]: Toolchain (without parser) took 1249.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 958.9 MB in the beginning and 1.1 GB in the end (delta: -136.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2020-07-29 02:06:39,800 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-29 02:06:39,800 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.53 ms. Allocated memory is still 1.0 GB. Free memory was 958.9 MB in the beginning and 948.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-29 02:06:39,801 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.12 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-29 02:06:39,802 INFO L168 Benchmark]: Boogie Preprocessor took 119.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -199.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-07-29 02:06:39,802 INFO L168 Benchmark]: RCFGBuilder took 245.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2020-07-29 02:06:39,803 INFO L168 Benchmark]: BuchiAutomizer took 554.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 40.1 MB). Peak memory consumption was 40.1 MB. Max. memory is 11.5 GB. [2020-07-29 02:06:39,804 INFO L168 Benchmark]: Witness Printer took 45.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-29 02:06:39,813 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 240.53 ms. Allocated memory is still 1.0 GB. Free memory was 958.9 MB in the beginning and 948.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.12 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 119.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -199.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 245.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 554.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 40.1 MB). Peak memory consumption was 40.1 MB. Max. memory is 11.5 GB. * Witness Printer took 45.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 2 locations. The remainder module has 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.4s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 6 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 7 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 24]: 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 {cond=1, \result=0, \old(cond)=1, x=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 3]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L10] int x=0; Loop: [L24] COND TRUE 1 [L14] COND TRUE 1 [L15] x=0 [L4] COND FALSE !(!(cond)) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...