./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/Ex07.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec 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/Ex07.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 f77d0d21d7cb1d6a29608eb65655982c4edaf4ed ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-20ed64e [2021-08-27 14:10:06,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 14:10:06,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 14:10:06,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 14:10:06,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 14:10:06,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 14:10:06,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 14:10:06,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 14:10:06,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 14:10:06,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 14:10:06,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 14:10:06,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 14:10:06,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 14:10:06,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 14:10:06,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 14:10:06,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 14:10:06,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 14:10:06,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 14:10:06,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 14:10:06,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 14:10:06,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 14:10:06,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 14:10:06,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 14:10:06,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 14:10:06,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 14:10:06,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 14:10:06,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 14:10:06,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 14:10:06,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 14:10:06,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 14:10:06,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 14:10:06,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 14:10:06,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 14:10:06,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 14:10:06,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 14:10:06,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 14:10:06,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 14:10:06,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 14:10:06,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 14:10:06,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 14:10:06,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 14:10:06,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 14:10:06,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 14:10:06,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 14:10:06,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 14:10:06,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 14:10:06,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 14:10:06,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 14:10:06,803 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 14:10:06,803 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 14:10:06,803 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 14:10:06,803 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 14:10:06,806 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 14:10:06,806 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 14:10:06,806 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 14:10:06,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 14:10:06,813 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 14:10:06,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 14:10:06,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 14:10:06,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 14:10:06,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 14:10:06,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 14:10:06,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 14:10:06,814 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 14:10:06,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 14:10:06,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 14:10:06,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 14:10:06,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 14:10:06,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 14:10:06,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 14:10:06,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 14:10:06,816 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 14:10:06,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f77d0d21d7cb1d6a29608eb65655982c4edaf4ed [2021-08-27 14:10:07,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 14:10:07,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 14:10:07,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 14:10:07,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 14:10:07,159 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 14:10:07,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/Ex07.c [2021-08-27 14:10:07,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec2f7e8c/9c269219c66241adb69839736072aea6/FLAG13e14bbbd [2021-08-27 14:10:07,694 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 14:10:07,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/Ex07.c [2021-08-27 14:10:07,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec2f7e8c/9c269219c66241adb69839736072aea6/FLAG13e14bbbd [2021-08-27 14:10:08,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec2f7e8c/9c269219c66241adb69839736072aea6 [2021-08-27 14:10:08,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 14:10:08,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 14:10:08,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 14:10:08,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 14:10:08,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 14:10:08,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b653099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08, skipping insertion in model container [2021-08-27 14:10:08,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 14:10:08,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 14:10:08,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:10:08,220 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 14:10:08,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:10:08,240 INFO L208 MainTranslator]: Completed translation [2021-08-27 14:10:08,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08 WrapperNode [2021-08-27 14:10:08,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 14:10:08,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 14:10:08,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 14:10:08,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 14:10:08,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 14:10:08,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 14:10:08,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 14:10:08,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 14:10:08,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 14:10:08,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 14:10:08,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 14:10:08,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 14:10:08,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (1/1) ... [2021-08-27 14:10:08,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:08,332 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) [2021-08-27 14:10:08,344 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 [2021-08-27 14:10:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 14:10:08,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 14:10:08,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 14:10:08,519 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 14:10:08,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:10:08 BoogieIcfgContainer [2021-08-27 14:10:08,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 14:10:08,523 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 14:10:08,523 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 14:10:08,526 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 14:10:08,527 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:10:08,527 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 02:10:08" (1/3) ... [2021-08-27 14:10:08,528 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@66d3b273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:10:08, skipping insertion in model container [2021-08-27 14:10:08,528 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:10:08,528 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:08" (2/3) ... [2021-08-27 14:10:08,529 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@66d3b273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:10:08, skipping insertion in model container [2021-08-27 14:10:08,529 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:10:08,529 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:10:08" (3/3) ... [2021-08-27 14:10:08,530 INFO L389 chiAutomizerObserver]: Analyzing ICFG Ex07.c [2021-08-27 14:10:08,576 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 14:10:08,576 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 14:10:08,576 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 14:10:08,576 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 14:10:08,576 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 14:10:08,576 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 14:10:08,576 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 14:10:08,576 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 14:10:08,587 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-08-27 14:10:08,600 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 14:10:08,600 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:10:08,601 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:10:08,605 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:10:08,605 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:10:08,605 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 14:10:08,605 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-08-27 14:10:08,606 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 14:10:08,606 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:10:08,607 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:10:08,607 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:10:08,607 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:10:08,613 INFO L791 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 4#L13-1true [2021-08-27 14:10:08,613 INFO L793 eck$LassoCheckResult]: Loop: 4#L13-1true assume !!(0 != ~unnamed0~0~true); 8#L10true assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 6#L10-2true assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 4#L13-1true [2021-08-27 14:10:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 14:10:08,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:08,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512855099] [2021-08-27 14:10:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:08,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,692 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,711 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash 39823, now seen corresponding path program 1 times [2021-08-27 14:10:08,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:08,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152428694] [2021-08-27 14:10:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:08,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:10:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:10:08,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:10:08,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152428694] [2021-08-27 14:10:08,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152428694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:10:08,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:10:08,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 14:10:08,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579769660] [2021-08-27 14:10:08,820 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 14:10:08,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:10:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 14:10:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 14:10:08,839 INFO L87 Difference]: Start difference. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-08-27 14:10:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:10:08,902 INFO L93 Difference]: Finished difference Result 7 states and 10 transitions. [2021-08-27 14:10:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 14:10:08,904 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 10 transitions. [2021-08-27 14:10:08,905 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 14:10:08,908 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 10 transitions. [2021-08-27 14:10:08,909 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-27 14:10:08,909 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 14:10:08,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2021-08-27 14:10:08,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:10:08,910 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 14:10:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2021-08-27 14:10:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-27 14:10:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:10:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2021-08-27 14:10:08,941 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 14:10:08,941 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 14:10:08,942 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 14:10:08,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2021-08-27 14:10:08,942 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 14:10:08,942 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:10:08,942 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:10:08,943 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:10:08,943 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:10:08,943 INFO L791 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 24#L13-1 [2021-08-27 14:10:08,943 INFO L793 eck$LassoCheckResult]: Loop: 24#L13-1 assume !!(0 != ~unnamed0~0~true); 25#L10 assume !(main_~i~0 > 0); 29#L10-2 assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 24#L13-1 [2021-08-27 14:10:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-08-27 14:10:08,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:08,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225548236] [2021-08-27 14:10:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:08,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,947 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,949 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash 39885, now seen corresponding path program 1 times [2021-08-27 14:10:08,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:08,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94230829] [2021-08-27 14:10:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:08,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,971 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,986 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 1 times [2021-08-27 14:10:08,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:08,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123825861] [2021-08-27 14:10:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:08,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,992 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:08,995 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:09,076 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:10:09,078 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:10:09,078 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:10:09,078 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:10:09,078 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 14:10:09,078 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,083 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:10:09,084 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:10:09,084 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration2_Loop [2021-08-27 14:10:09,084 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:10:09,084 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:10:09,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,212 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:10:09,213 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 14:10:09,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,216 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) [2021-08-27 14:10:09,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:10:09,228 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:10:09,238 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 [2021-08-27 14:10:09,246 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:10:09,247 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: [] [2021-08-27 14:10:09,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 14:10:09,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,268 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) [2021-08-27 14:10:09,269 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 [2021-08-27 14:10:09,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:10:09,273 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:10:09,294 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:10:09,295 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: [] [2021-08-27 14:10:09,313 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 [2021-08-27 14:10:09,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,314 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) [2021-08-27 14:10:09,316 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 [2021-08-27 14:10:09,317 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:10:09,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:10:09,348 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 [2021-08-27 14:10:09,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,354 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) [2021-08-27 14:10:09,357 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 [2021-08-27 14:10:09,358 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 14:10:09,358 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:10:09,396 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 14:10:09,401 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 [2021-08-27 14:10:09,402 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:10:09,402 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:10:09,402 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:10:09,402 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:10:09,402 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:10:09,402 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,402 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:10:09,402 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:10:09,403 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration2_Loop [2021-08-27 14:10:09,403 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:10:09,403 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:10:09,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,478 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:10:09,481 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:10:09,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,483 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) [2021-08-27 14:10:09,494 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 [2021-08-27 14:10:09,503 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:10:09,503 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:10:09,503 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:10:09,503 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:10:09,509 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:10:09,509 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:10:09,513 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 [2021-08-27 14:10:09,521 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:10:09,544 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 [2021-08-27 14:10:09,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,545 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) [2021-08-27 14:10:09,546 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 [2021-08-27 14:10:09,548 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 [2021-08-27 14:10:09,557 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:10:09,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:10:09,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:10:09,558 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:10:09,558 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:10:09,559 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:10:09,559 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:10:09,585 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:10:09,591 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 14:10:09,591 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 14:10:09,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,593 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) [2021-08-27 14:10:09,594 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 [2021-08-27 14:10:09,610 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:10:09,610 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 14:10:09,611 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:10:09,611 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-27 14:10:09,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 14:10:09,635 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 14:10:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:10:09,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:10:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:10:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:10:09,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:10:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:10:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:10:09,743 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 14:10:09,744 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-08-27 14:10:09,782 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 16 states and 22 transitions. Complement of second has 5 states. [2021-08-27 14:10:09,783 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 [2021-08-27 14:10:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-08-27 14:10:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-08-27 14:10:09,785 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 3 letters. [2021-08-27 14:10:09,786 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:10:09,786 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 4 letters. Loop has 3 letters. [2021-08-27 14:10:09,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:10:09,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 6 letters. [2021-08-27 14:10:09,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:10:09,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 22 transitions. [2021-08-27 14:10:09,789 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 14:10:09,793 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 18 transitions. [2021-08-27 14:10:09,793 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-08-27 14:10:09,794 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-08-27 14:10:09,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2021-08-27 14:10:09,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:10:09,794 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-08-27 14:10:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2021-08-27 14:10:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2021-08-27 14:10:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-08-27 14:10:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-08-27 14:10:09,797 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-08-27 14:10:09,797 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-08-27 14:10:09,797 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 14:10:09,797 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-08-27 14:10:09,798 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 14:10:09,798 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:10:09,798 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:10:09,799 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 14:10:09,799 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:10:09,799 INFO L791 eck$LassoCheckResult]: Stem: 85#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 86#L13-1 assume !!(0 != ~unnamed0~0~true); 83#L10 [2021-08-27 14:10:09,799 INFO L793 eck$LassoCheckResult]: Loop: 83#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 79#L10-2 assume !(main_~i~0 < 0); 80#L13-1 assume !!(0 != ~unnamed0~0~true); 83#L10 [2021-08-27 14:10:09,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:09,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-08-27 14:10:09,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:09,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016205313] [2021-08-27 14:10:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:09,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:09,816 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:09,819 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash 42945, now seen corresponding path program 1 times [2021-08-27 14:10:09,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:09,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953517558] [2021-08-27 14:10:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:09,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:09,823 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:09,826 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash 29863736, now seen corresponding path program 1 times [2021-08-27 14:10:09,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:09,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972946700] [2021-08-27 14:10:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:09,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:09,830 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:09,832 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:09,862 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:10:09,862 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:10:09,862 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:10:09,862 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:10:09,862 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 14:10:09,862 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,862 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:10:09,863 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:10:09,863 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration3_Loop [2021-08-27 14:10:09,863 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:10:09,863 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:10:09,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:09,933 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 [2021-08-27 14:10:09,982 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:10:09,982 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 14:10:09,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:09,985 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) [2021-08-27 14:10:09,996 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:10:09,997 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:10:10,012 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 [2021-08-27 14:10:10,022 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:10:10,022 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: [] [2021-08-27 14:10:10,045 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 [2021-08-27 14:10:10,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:10,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:10,047 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) [2021-08-27 14:10:10,048 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 [2021-08-27 14:10:10,050 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:10:10,050 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:10:10,111 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 [2021-08-27 14:10:10,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:10,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:10,113 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) [2021-08-27 14:10:10,120 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 14:10:10,120 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:10:10,144 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 [2021-08-27 14:10:10,181 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 14:10:10,188 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 [2021-08-27 14:10:10,189 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:10:10,189 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:10:10,189 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:10:10,189 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:10:10,189 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:10:10,189 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:10,189 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:10:10,189 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:10:10,189 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration3_Loop [2021-08-27 14:10:10,189 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:10:10,189 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:10:10,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:10,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:10,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:10:10,262 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:10:10,262 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:10:10,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:10,264 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) [2021-08-27 14:10:10,275 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 [2021-08-27 14:10:10,285 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:10:10,285 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:10:10,285 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:10:10,285 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:10:10,285 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:10:10,287 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:10:10,287 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:10:10,290 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 [2021-08-27 14:10:10,300 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:10:10,304 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 14:10:10,304 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 14:10:10,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:10,305 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) [2021-08-27 14:10:10,307 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 [2021-08-27 14:10:10,309 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:10:10,310 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 14:10:10,310 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:10:10,310 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-27 14:10:10,336 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 [2021-08-27 14:10:10,337 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 14:10:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:10:10,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:10:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:10:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:10:10,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:10:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:10:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:10:10,460 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 [2021-08-27 14:10:10,461 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-08-27 14:10:10,480 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 21 states and 28 transitions. Complement of second has 5 states. [2021-08-27 14:10:10,481 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 [2021-08-27 14:10:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-08-27 14:10:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-08-27 14:10:10,481 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 3 letters. [2021-08-27 14:10:10,482 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:10:10,482 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 3 letters. [2021-08-27 14:10:10,482 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:10:10,482 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 6 letters. [2021-08-27 14:10:10,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:10:10,483 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 28 transitions. [2021-08-27 14:10:10,486 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 14:10:10,486 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 27 transitions. [2021-08-27 14:10:10,486 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-08-27 14:10:10,487 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 14:10:10,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 27 transitions. [2021-08-27 14:10:10,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:10:10,487 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-08-27 14:10:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 27 transitions. [2021-08-27 14:10:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-08-27 14:10:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 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) [2021-08-27 14:10:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2021-08-27 14:10:10,489 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-08-27 14:10:10,489 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-08-27 14:10:10,490 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 14:10:10,490 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 23 transitions. [2021-08-27 14:10:10,490 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 14:10:10,490 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:10:10,490 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:10:10,491 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 14:10:10,491 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:10:10,491 INFO L791 eck$LassoCheckResult]: Stem: 151#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 152#L13-1 assume !!(0 != ~unnamed0~0~true); 158#L10 assume !(main_~i~0 > 0); 144#L10-2 [2021-08-27 14:10:10,491 INFO L793 eck$LassoCheckResult]: Loop: 144#L10-2 assume !(main_~i~0 < 0); 145#L13-1 assume !!(0 != ~unnamed0~0~true); 153#L10 assume !(main_~i~0 > 0); 144#L10-2 [2021-08-27 14:10:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-08-27 14:10:10,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:10,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961363957] [2021-08-27 14:10:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:10,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:10,495 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:10,498 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash 50297, now seen corresponding path program 1 times [2021-08-27 14:10:10,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:10,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020500375] [2021-08-27 14:10:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:10,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:10,501 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:10,503 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:10,504 INFO L82 PathProgramCache]: Analyzing trace with hash 925835413, now seen corresponding path program 1 times [2021-08-27 14:10:10,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:10,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543482703] [2021-08-27 14:10:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:10,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:10,507 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:10,510 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:10,550 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 [2021-08-27 14:10:10,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 02:10:10 BoogieIcfgContainer [2021-08-27 14:10:10,608 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 14:10:10,609 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 14:10:10,609 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 14:10:10,610 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 14:10:10,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:10:08" (3/4) ... [2021-08-27 14:10:10,612 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-08-27 14:10:10,644 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 14:10:10,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 14:10:10,646 INFO L168 Benchmark]: Toolchain (without parser) took 2545.36 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 45.1 MB in the beginning and 55.9 MB in the end (delta: -10.8 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:10,646 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 65.0 MB. Free memory is still 46.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:10:10,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.85 ms. Allocated memory is still 65.0 MB. Free memory was 44.8 MB in the beginning and 36.5 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:10,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.39 ms. Allocated memory is still 65.0 MB. Free memory was 36.5 MB in the beginning and 35.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:10:10,649 INFO L168 Benchmark]: Boogie Preprocessor took 36.43 ms. Allocated memory is still 65.0 MB. Free memory was 35.2 MB in the beginning and 48.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:10,651 INFO L168 Benchmark]: RCFGBuilder took 220.53 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 40.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:10,652 INFO L168 Benchmark]: BuchiAutomizer took 2085.38 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 39.8 MB in the beginning and 57.3 MB in the end (delta: -17.5 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:10,652 INFO L168 Benchmark]: Witness Printer took 35.00 ms. Allocated memory is still 81.8 MB. Free memory was 57.3 MB in the beginning and 55.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:10,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 65.0 MB. Free memory is still 46.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 139.85 ms. Allocated memory is still 65.0 MB. Free memory was 44.8 MB in the beginning and 36.5 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.39 ms. Allocated memory is still 65.0 MB. Free memory was 36.5 MB in the beginning and 35.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.43 ms. Allocated memory is still 65.0 MB. Free memory was 35.2 MB in the beginning and 48.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 220.53 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 40.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2085.38 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 39.8 MB in the beginning and 57.3 MB in the end (delta: -17.5 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. * Witness Printer took 35.00 ms. Allocated memory is still 81.8 MB. Free memory was 57.3 MB in the beginning and 55.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 3 locations. One deterministic module has affine ranking function i and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 16 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.0s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 26.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 16 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 11 SDtfs, 10 SDslu, 3 SDs, 0 SdLazy, 22 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51.7ms Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax220 hnf100 lsp45 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 38ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - 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 {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2056b8e7=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE \read(true) [L10] COND FALSE !(i > 0) Loop: [L13] COND FALSE !(i < 0) [L9] COND TRUE \read(true) [L10] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-08-27 14:10:10,692 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...