./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-15/array04_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-15/array04_alloca.i -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 ede187b1b02320b6ac4ee708403ec99e5631a2e0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:48:48,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:48:48,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:48:48,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:48:48,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:48:48,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:48:48,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:48:48,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:48:48,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:48:48,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:48:48,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:48:48,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:48:48,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:48:48,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:48:48,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:48:48,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:48:48,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:48:48,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:48:48,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:48:48,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:48:48,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:48:48,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:48:48,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:48:48,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:48:48,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:48:48,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:48:48,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:48:48,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:48:48,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:48:48,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:48:48,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:48:48,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:48:48,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:48:48,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:48:48,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:48:48,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:48:48,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:48:48,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:48:48,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:48:48,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:48:48,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:48:48,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:48:48,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:48:48,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:48:48,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:48:48,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:48:48,863 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:48:48,863 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:48:48,863 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:48:48,863 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:48:48,864 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:48:48,864 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:48:48,864 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:48:48,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:48:48,864 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:48:48,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:48:48,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:48:48,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:48:48,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:48:48,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:48:48,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:48:48,866 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:48:48,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:48:48,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:48:48,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:48:48,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:48:48,867 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:48:48,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:48:48,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:48:48,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:48:48,868 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:48:48,869 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:48:48,869 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede187b1b02320b6ac4ee708403ec99e5631a2e0 [2020-10-19 18:48:49,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:48:49,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:48:49,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:48:49,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:48:49,236 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:48:49,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-15/array04_alloca.i [2020-10-19 18:48:49,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61558d3cd/d754289b561c45b5b07c518aba46e529/FLAGa864551d5 [2020-10-19 18:48:49,784 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:48:49,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-15/array04_alloca.i [2020-10-19 18:48:49,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61558d3cd/d754289b561c45b5b07c518aba46e529/FLAGa864551d5 [2020-10-19 18:48:50,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61558d3cd/d754289b561c45b5b07c518aba46e529 [2020-10-19 18:48:50,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:48:50,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:48:50,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:48:50,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:48:50,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:48:50,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63bb5352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50, skipping insertion in model container [2020-10-19 18:48:50,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:48:50,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:48:50,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:48:50,483 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:48:50,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:48:50,686 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:48:50,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50 WrapperNode [2020-10-19 18:48:50,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:48:50,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:48:50,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:48:50,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:48:50,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:48:50,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:48:50,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:48:50,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:48:50,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (1/1) ... [2020-10-19 18:48:50,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:48:50,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:48:50,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:48:50,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:48:50,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (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 [2020-10-19 18:48:50,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:48:50,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:48:50,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:48:50,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:48:50,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:48:50,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:48:51,048 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:48:51,048 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 18:48:51,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:48:51 BoogieIcfgContainer [2020-10-19 18:48:51,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:48:51,051 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:48:51,052 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:48:51,055 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:48:51,056 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:48:51,057 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:48:50" (1/3) ... [2020-10-19 18:48:51,058 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@36f4a159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:48:51, skipping insertion in model container [2020-10-19 18:48:51,058 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:48:51,058 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:48:50" (2/3) ... [2020-10-19 18:48:51,059 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@36f4a159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:48:51, skipping insertion in model container [2020-10-19 18:48:51,059 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:48:51,059 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:48:51" (3/3) ... [2020-10-19 18:48:51,061 INFO L373 chiAutomizerObserver]: Analyzing ICFG array04_alloca.i [2020-10-19 18:48:51,124 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:48:51,125 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:48:51,125 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:48:51,125 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:48:51,126 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:48:51,126 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:48:51,126 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:48:51,127 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:48:51,143 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-10-19 18:48:51,172 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 3 [2020-10-19 18:48:51,172 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:48:51,173 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:48:51,180 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:48:51,181 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:48:51,181 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:48:51,181 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-10-19 18:48:51,183 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 3 [2020-10-19 18:48:51,183 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:48:51,183 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:48:51,184 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:48:51,184 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:48:51,194 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 6#L-1true havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~post207, main_#t~mem209, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 14#L367true assume !(main_~length~0 < 1); 5#L367-2true call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 11#L369true assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 15#L370-3true [2020-10-19 18:48:51,195 INFO L796 eck$LassoCheckResult]: Loop: 15#L370-3true assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208; 13#L370-2true main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 15#L370-3true [2020-10-19 18:48:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:51,202 INFO L82 PathProgramCache]: Analyzing trace with hash 28695753, now seen corresponding path program 1 times [2020-10-19 18:48:51,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:51,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220718944] [2020-10-19 18:48:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:51,313 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:51,325 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:51,347 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:48:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1667, now seen corresponding path program 1 times [2020-10-19 18:48:51,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:51,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242609387] [2020-10-19 18:48:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:51,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:51,368 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:51,371 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:48:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815563, now seen corresponding path program 1 times [2020-10-19 18:48:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:51,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439837073] [2020-10-19 18:48:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:51,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:51,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:51,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:48:51,656 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:48:51,657 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:48:51,657 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:48:51,657 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:48:51,658 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:48:51,658 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:48:51,658 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:48:51,658 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:48:51,659 INFO L133 ssoRankerPreferences]: Filename of dumped script: array04_alloca.i_Iteration1_Lasso [2020-10-19 18:48:51,659 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:48:51,659 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:48:51,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:51,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:51,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:51,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:51,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:51,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:51,834 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:51,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:48:52,074 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:48:52,080 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:48:52,100 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:48:52,103 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:48:52,103 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:48:52,104 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:48:52,104 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:48:52,104 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:48:52,107 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:48:52,107 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:48:52,111 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:48:52,155 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:48:52,158 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:48:52,158 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:48:52,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:48:52,159 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:48:52,159 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:48:52,160 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:48:52,160 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:48:52,162 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:48:52,197 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:48:52,199 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:48:52,199 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:48:52,199 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:48:52,200 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:48:52,204 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:48:52,204 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:48:52,209 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:48:52,247 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:48:52,249 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:48:52,249 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:48:52,249 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:48:52,249 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:48:52,259 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:48:52,259 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:48:52,276 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:48:52,338 INFO L443 ModelExtractionUtils]: Simplification made 12 calls to the SMT solver. [2020-10-19 18:48:52,339 INFO L444 ModelExtractionUtils]: 6 out of 22 variables were initially zero. Simplification set additionally 12 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:48:52,353 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:48:52,362 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2020-10-19 18:48:52,362 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:48:52,363 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~arr~0.offset, v_rep(select #length ULTIMATE.start_main_#t~malloc206.base)_1) = -4*ULTIMATE.start_main_~i~0 - 1*ULTIMATE.start_main_~arr~0.offset + 2*v_rep(select #length ULTIMATE.start_main_#t~malloc206.base)_1 Supporting invariants [] [2020-10-19 18:48:52,410 INFO L297 tatePredicateManager]: 2 out of 3 supporting invariants were superfluous and have been removed [2020-10-19 18:48:52,424 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-10-19 18:48:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:48:52,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:48:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:48:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:48:52,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:48:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:48:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:48:52,552 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 2 loop predicates [2020-10-19 18:48:52,554 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2020-10-19 18:48:52,645 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states.. Second operand 4 states. Result 27 states and 37 transitions. Complement of second has 9 states. [2020-10-19 18:48:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:48:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:48:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2020-10-19 18:48:52,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 5 letters. Loop has 2 letters. [2020-10-19 18:48:52,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:48:52,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 7 letters. Loop has 2 letters. [2020-10-19 18:48:52,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:48:52,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 5 letters. Loop has 4 letters. [2020-10-19 18:48:52,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:48:52,654 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 37 transitions. [2020-10-19 18:48:52,658 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:48:52,662 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 10 states and 13 transitions. [2020-10-19 18:48:52,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-19 18:48:52,664 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-19 18:48:52,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-10-19 18:48:52,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:48:52,665 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-19 18:48:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-10-19 18:48:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-19 18:48:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 18:48:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-10-19 18:48:52,695 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-19 18:48:52,695 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-19 18:48:52,695 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:48:52,696 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2020-10-19 18:48:52,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:48:52,697 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:48:52,697 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:48:52,697 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:48:52,698 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:48:52,698 INFO L794 eck$LassoCheckResult]: Stem: 112#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 108#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~post207, main_#t~mem209, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 109#L367 assume !(main_~length~0 < 1); 113#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 114#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 115#L370-3 assume !(main_~i~0 < main_~length~0); 111#L370-4 main_~j~0 := 0; 110#L374-2 [2020-10-19 18:48:52,698 INFO L796 eck$LassoCheckResult]: Loop: 110#L374-2 assume !!(0 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 + main_#t~mem209;havoc main_#t~mem209; 110#L374-2 [2020-10-19 18:48:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815505, now seen corresponding path program 1 times [2020-10-19 18:48:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:52,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327152634] [2020-10-19 18:48:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:48:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:48:52,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327152634] [2020-10-19 18:48:52,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:48:52,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:48:52,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208082178] [2020-10-19 18:48:52,762 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:48:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash 68, now seen corresponding path program 1 times [2020-10-19 18:48:52,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:52,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841593917] [2020-10-19 18:48:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,771 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,777 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:48:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:48:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:48:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:48:52,813 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-10-19 18:48:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:48:52,841 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2020-10-19 18:48:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:48:52,842 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2020-10-19 18:48:52,843 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:48:52,844 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 13 transitions. [2020-10-19 18:48:52,844 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-19 18:48:52,844 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-19 18:48:52,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 13 transitions. [2020-10-19 18:48:52,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:48:52,845 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-10-19 18:48:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 13 transitions. [2020-10-19 18:48:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-10-19 18:48:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 18:48:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-10-19 18:48:52,848 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-10-19 18:48:52,848 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-10-19 18:48:52,848 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:48:52,848 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2020-10-19 18:48:52,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:48:52,849 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:48:52,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:48:52,850 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:48:52,850 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:48:52,851 INFO L794 eck$LassoCheckResult]: Stem: 140#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 137#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~post207, main_#t~mem209, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 138#L367 assume !(main_~length~0 < 1); 141#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 142#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 143#L370-3 assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208; 144#L370-2 main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 145#L370-3 assume !(main_~i~0 < main_~length~0); 139#L370-4 main_~j~0 := 0; 136#L374-2 [2020-10-19 18:48:52,851 INFO L796 eck$LassoCheckResult]: Loop: 136#L374-2 assume !!(0 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 + main_#t~mem209;havoc main_#t~mem209; 136#L374-2 [2020-10-19 18:48:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1182969107, now seen corresponding path program 1 times [2020-10-19 18:48:52,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:52,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579397882] [2020-10-19 18:48:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,867 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,880 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,884 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:48:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash 68, now seen corresponding path program 2 times [2020-10-19 18:48:52,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:52,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801655301] [2020-10-19 18:48:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:48:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:48:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1982663310, now seen corresponding path program 1 times [2020-10-19 18:48:52,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:48:52,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008141206] [2020-10-19 18:48:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:48:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:48:52,928 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:48:52,933 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:48:53,100 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-19 18:48:53,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:48:53 BoogieIcfgContainer [2020-10-19 18:48:53,186 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:48:53,187 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:48:53,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:48:53,187 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:48:53,188 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:48:51" (3/4) ... [2020-10-19 18:48:53,192 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:48:53,237 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:48:53,237 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:48:53,240 INFO L168 Benchmark]: Toolchain (without parser) took 3180.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 958.6 MB in the beginning and 873.8 MB in the end (delta: 84.8 MB). Peak memory consumption was 214.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:48:53,240 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:48:53,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -151.5 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:48:53,242 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:48:53,243 INFO L168 Benchmark]: Boogie Preprocessor took 22.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:48:53,243 INFO L168 Benchmark]: RCFGBuilder took 295.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:48:53,244 INFO L168 Benchmark]: BuchiAutomizer took 2134.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 873.8 MB in the end (delta: 210.6 MB). Peak memory consumption was 210.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:48:53,245 INFO L168 Benchmark]: Witness Printer took 50.92 ms. Allocated memory is still 1.2 GB. Free memory is still 873.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:48:53,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 621.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -151.5 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 295.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2134.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 873.8 MB in the end (delta: 210.6 MB). Peak memory consumption was 210.6 MB. Max. memory is 11.5 GB. * Witness Printer took 50.92 ms. Allocated memory is still 1.2 GB. Free memory is still 873.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #length * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -4 * i + -1 * arr + 2 * unknown-#length-unknown[__builtin_alloca(length*sizeof(int))] and consists of 6 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.0s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 1.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 10 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 21 SDslu, 11 SDs, 0 SdLazy, 29 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU1 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital100 mio100 ax100 hnf99 lsp93 ukn82 mio100 lsp64 div100 bol100 ite100 ukn100 eq167 hnf91 smp100 dnf100 smp100 tf100 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 16ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: 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: 374]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {NULL=0, \result=0, NULL=1, arr=2, arr=0, i=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4953102c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@243d13d2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2221415d=0, length=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@514f3930=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2221415d=2, j=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@746daad1=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 374]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L365] int i, j; [L366] int length = __VERIFIER_nondet_int(); [L367] COND FALSE !(length < 1) [L368] int *arr = __builtin_alloca(length*sizeof(int)); [L369] COND FALSE !(!arr) [L370] i=0 [L370] COND TRUE i