./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 54858612 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-crafted/RecursiveNonterminating-1.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 f21f1881350863de740f7b7321104b53617dd8ce .............................................................................................................................................................................................................................................................................. 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 0.2.0-5485861 [2020-10-26 04:14:26,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 04:14:26,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 04:14:26,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 04:14:26,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 04:14:26,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 04:14:26,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 04:14:26,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 04:14:26,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 04:14:26,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 04:14:26,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 04:14:26,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 04:14:26,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 04:14:26,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 04:14:26,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 04:14:26,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 04:14:26,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 04:14:26,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 04:14:26,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 04:14:26,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 04:14:26,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 04:14:26,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 04:14:26,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 04:14:26,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 04:14:26,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 04:14:26,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 04:14:26,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 04:14:26,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 04:14:26,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 04:14:26,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 04:14:26,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 04:14:26,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 04:14:26,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 04:14:26,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 04:14:26,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 04:14:26,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 04:14:26,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 04:14:26,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 04:14:26,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 04:14:26,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 04:14:26,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 04:14:26,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-26 04:14:26,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 04:14:26,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 04:14:26,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 04:14:26,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 04:14:26,799 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 04:14:26,799 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-26 04:14:26,799 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-26 04:14:26,799 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-26 04:14:26,799 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-26 04:14:26,800 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-26 04:14:26,801 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-26 04:14:26,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 04:14:26,801 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 04:14:26,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 04:14:26,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 04:14:26,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-26 04:14:26,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-26 04:14:26,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-26 04:14:26,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 04:14:26,803 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-26 04:14:26,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 04:14:26,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-26 04:14:26,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 04:14:26,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 04:14:26,804 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-26 04:14:26,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 04:14:26,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 04:14:26,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 04:14:26,805 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-26 04:14:26,807 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-26 04:14:26,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f21f1881350863de740f7b7321104b53617dd8ce [2020-10-26 04:14:27,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 04:14:27,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 04:14:27,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 04:14:27,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 04:14:27,303 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 04:14:27,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2020-10-26 04:14:27,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63109d332/175592ed7ba448219988b8cd014cf6ef/FLAGefa42d973 [2020-10-26 04:14:27,984 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 04:14:27,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2020-10-26 04:14:27,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63109d332/175592ed7ba448219988b8cd014cf6ef/FLAGefa42d973 [2020-10-26 04:14:28,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63109d332/175592ed7ba448219988b8cd014cf6ef [2020-10-26 04:14:28,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 04:14:28,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 04:14:28,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 04:14:28,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 04:14:28,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 04:14:28,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b79323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28, skipping insertion in model container [2020-10-26 04:14:28,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 04:14:28,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 04:14:28,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:14:28,568 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 04:14:28,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:14:28,597 INFO L208 MainTranslator]: Completed translation [2020-10-26 04:14:28,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28 WrapperNode [2020-10-26 04:14:28,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 04:14:28,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 04:14:28,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 04:14:28,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 04:14:28,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 04:14:28,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 04:14:28,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 04:14:28,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 04:14:28,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (1/1) ... [2020-10-26 04:14:28,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 04:14:28,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 04:14:28,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 04:14:28,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 04:14:28,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (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 [2020-10-26 04:14:28,741 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2020-10-26 04:14:28,742 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2020-10-26 04:14:28,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 04:14:28,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 04:14:28,975 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 04:14:28,976 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 04:14:28,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:14:28 BoogieIcfgContainer [2020-10-26 04:14:28,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 04:14:28,982 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-26 04:14:28,982 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-26 04:14:28,988 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-26 04:14:28,989 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:14:28,989 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.10 04:14:28" (1/3) ... [2020-10-26 04:14:28,992 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6f5f0994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:14:28, skipping insertion in model container [2020-10-26 04:14:28,993 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:14:28,993 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:14:28" (2/3) ... [2020-10-26 04:14:28,994 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6f5f0994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:14:28, skipping insertion in model container [2020-10-26 04:14:28,995 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:14:28,995 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:14:28" (3/3) ... [2020-10-26 04:14:28,997 INFO L373 chiAutomizerObserver]: Analyzing ICFG RecursiveNonterminating-1.c [2020-10-26 04:14:29,110 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-26 04:14:29,110 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-26 04:14:29,110 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-26 04:14:29,111 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 04:14:29,111 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 04:14:29,111 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-26 04:14:29,111 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 04:14:29,112 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-26 04:14:29,129 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-10-26 04:14:29,160 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:14:29,160 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:14:29,161 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:14:29,171 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 04:14:29,171 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:14:29,171 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-26 04:14:29,173 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-10-26 04:14:29,176 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:14:29,176 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:14:29,176 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:14:29,177 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 04:14:29,177 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:14:29,186 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~n~0;main_~n~0 := main_#t~nondet0;havoc main_#t~nondet0; 8#L18true assume !!(main_~n~0 <= 2147483646); 11#L19true call rec(main_~n~0, 1 + main_~n~0);< 3#recENTRYtrue [2020-10-26 04:14:29,187 INFO L796 eck$LassoCheckResult]: Loop: 3#recENTRYtrue ~x := #in~x;~y := #in~y; 10#L11true assume ~x <= 23 && ~x >= -42; 5#L12true call rec(2 * ~y - 2, 1 + ~x);< 3#recENTRYtrue [2020-10-26 04:14:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:29,199 INFO L82 PathProgramCache]: Analyzing trace with hash 39889, now seen corresponding path program 1 times [2020-10-26 04:14:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:29,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306706652] [2020-10-26 04:14:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:29,333 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:29,352 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:29,378 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash 29905, now seen corresponding path program 1 times [2020-10-26 04:14:29,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:29,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924351718] [2020-10-26 04:14:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:29,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:29,427 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:29,433 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:29,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1188333313, now seen corresponding path program 1 times [2020-10-26 04:14:29,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:29,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635131429] [2020-10-26 04:14:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:29,477 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:29,502 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:29,506 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:29,746 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-10-26 04:14:29,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.10 04:14:29 BoogieIcfgContainer [2020-10-26 04:14:29,955 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-26 04:14:29,956 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 04:14:29,956 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 04:14:29,957 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 04:14:29,957 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:14:28" (3/4) ... [2020-10-26 04:14:29,961 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-26 04:14:29,997 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 04:14:29,997 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 04:14:29,999 INFO L168 Benchmark]: Toolchain (without parser) took 1642.31 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 22.3 MB in the beginning and 33.2 MB in the end (delta: -10.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:30,000 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 24.5 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:14:30,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.66 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 24.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:30,002 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.64 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 23.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:30,003 INFO L168 Benchmark]: Boogie Preprocessor took 17.54 ms. Allocated memory is still 44.0 MB. Free memory was 23.3 MB in the beginning and 22.5 MB in the end (delta: 816.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:14:30,004 INFO L168 Benchmark]: RCFGBuilder took 328.41 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 22.5 MB in the beginning and 34.4 MB in the end (delta: -11.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:30,005 INFO L168 Benchmark]: BuchiAutomizer took 973.42 ms. Allocated memory is still 54.5 MB. Free memory was 34.2 MB in the beginning and 34.7 MB in the end (delta: -454.2 kB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:30,006 INFO L168 Benchmark]: Witness Printer took 41.46 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 33.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:14:30,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 24.5 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 235.66 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 24.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.64 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 23.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.54 ms. Allocated memory is still 44.0 MB. Free memory was 23.3 MB in the beginning and 22.5 MB in the end (delta: 816.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 328.41 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 22.5 MB in the beginning and 34.4 MB in the end (delta: -11.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 973.42 ms. Allocated memory is still 54.5 MB. Free memory was 34.2 MB in the beginning and 34.7 MB in the end (delta: -454.2 kB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Witness Printer took 41.46 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 33.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.8s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: No data available LassoAnalysisResults: nont1 unkn0 SFLI0 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: 10]: 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 {x=0, y=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3a416fbf=0, \result=0, \old(x)=0, NULL=0, n=0, \old(y)=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 10]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L17] int n = __VERIFIER_nondet_int(); [L18] COND FALSE !(!(n<=2147483646)) [L19] CALL rec(n, n + 1) Loop: [L11] COND TRUE x <= 23 && x >= -42 [L12] CALL rec(2*y-2, x + 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...