./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-15/array19_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/array19_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 1ea3ac03f270ffde8f9fa6679f30ddad451a463f .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:49:28,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:49:28,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:49:28,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:49:28,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:49:28,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:49:28,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:49:28,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:49:28,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:49:28,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:49:28,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:49:28,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:49:28,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:49:28,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:49:28,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:49:28,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:49:28,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:49:28,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:49:28,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:49:28,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:49:28,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:49:28,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:49:28,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:49:28,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:49:28,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:49:28,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:49:28,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:49:28,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:49:28,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:49:28,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:49:28,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:49:28,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:49:28,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:49:28,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:49:28,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:49:28,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:49:28,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:49:28,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:49:28,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:49:28,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:49:28,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:49:28,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:49:28,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:49:28,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:49:28,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:49:28,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:49:28,248 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:49:28,248 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:49:28,249 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:49:28,249 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:49:28,249 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:49:28,249 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:49:28,250 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:49:28,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:49:28,250 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:49:28,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:49:28,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:49:28,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:49:28,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:49:28,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:49:28,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:49:28,252 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:49:28,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:49:28,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:49:28,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:49:28,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:49:28,253 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:49:28,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:49:28,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:49:28,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:49:28,254 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:49:28,255 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:49:28,255 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 -> 1ea3ac03f270ffde8f9fa6679f30ddad451a463f [2020-10-19 18:49:28,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:49:28,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:49:28,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:49:28,610 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:49:28,611 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:49:28,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-15/array19_alloca.i [2020-10-19 18:49:28,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6584f7ad/019592b5cc3a4ff993cad23d074c4b97/FLAG76181be7d [2020-10-19 18:49:29,129 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:49:29,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-15/array19_alloca.i [2020-10-19 18:49:29,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6584f7ad/019592b5cc3a4ff993cad23d074c4b97/FLAG76181be7d [2020-10-19 18:49:29,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6584f7ad/019592b5cc3a4ff993cad23d074c4b97 [2020-10-19 18:49:29,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:49:29,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:49:29,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:49:29,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:49:29,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:49:29,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:49:29" (1/1) ... [2020-10-19 18:49:29,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777b0a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:29, skipping insertion in model container [2020-10-19 18:49:29,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:49:29" (1/1) ... [2020-10-19 18:49:29,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:49:29,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:49:29,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:49:29,931 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:49:30,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:49:30,107 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:49:30,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30 WrapperNode [2020-10-19 18:49:30,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:49:30,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:49:30,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:49:30,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:49:30,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:49:30,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:49:30,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:49:30,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:49:30,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (1/1) ... [2020-10-19 18:49:30,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:49:30,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:49:30,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:49:30,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:49:30,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (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 18:49:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:49:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:49:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:49:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:49:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:49:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:49:30,489 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:49:30,489 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 18:49:30,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:49:30 BoogieIcfgContainer [2020-10-19 18:49:30,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:49:30,493 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:49:30,493 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:49:30,497 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:49:30,499 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:49:30,499 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:49:29" (1/3) ... [2020-10-19 18:49:30,500 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7a5ff0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:49:30, skipping insertion in model container [2020-10-19 18:49:30,501 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:49:30,501 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:49:30" (2/3) ... [2020-10-19 18:49:30,501 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7a5ff0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:49:30, skipping insertion in model container [2020-10-19 18:49:30,501 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:49:30,502 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:49:30" (3/3) ... [2020-10-19 18:49:30,504 INFO L373 chiAutomizerObserver]: Analyzing ICFG array19_alloca.i [2020-10-19 18:49:30,593 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:49:30,594 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:49:30,594 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:49:30,594 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:49:30,594 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:49:30,595 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:49:30,595 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:49:30,595 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:49:30,611 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-10-19 18:49:30,637 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 3 [2020-10-19 18:49:30,638 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:49:30,638 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:49:30,647 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:49:30,647 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:49:30,647 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:49:30,648 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-10-19 18:49:30,649 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 3 [2020-10-19 18:49:30,650 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:49:30,650 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:49:30,650 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:49:30,651 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:49:30,661 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 6#L-1true havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~post207, main_#t~mem209, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 14#L367true assume !(main_~length~0 < 1); 5#L367-2true call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 11#L369true assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 15#L370-3true [2020-10-19 18:49:30,661 INFO L796 eck$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 18:49:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash 28695753, now seen corresponding path program 1 times [2020-10-19 18:49:30,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:30,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470257311] [2020-10-19 18:49:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:30,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:30,834 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:30,855 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:49:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1667, now seen corresponding path program 1 times [2020-10-19 18:49:30,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:30,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078542114] [2020-10-19 18:49:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:30,866 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:30,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:30,876 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:49:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:30,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815563, now seen corresponding path program 1 times [2020-10-19 18:49:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:30,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143209547] [2020-10-19 18:49:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:30,901 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:30,930 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:30,936 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:49:31,112 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-19 18:49:31,179 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:49:31,180 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:49:31,180 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:49:31,181 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:49:31,181 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:49:31,181 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:49:31,181 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:49:31,182 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:49:31,182 INFO L133 ssoRankerPreferences]: Filename of dumped script: array19_alloca.i_Iteration1_Lasso [2020-10-19 18:49:31,182 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:49:31,183 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:49:31,209 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 18:49:31,218 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 18:49:31,224 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 18:49:31,231 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 18:49:31,414 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-19 18:49:31,443 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 18:49:31,446 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 18:49:31,450 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 18:49:31,454 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 18:49:31,697 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:49:31,703 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 18:49:31,717 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 18:49:31,720 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:49:31,721 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:49:31,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:49:31,722 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:49:31,722 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:49:31,725 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:49:31,726 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 18:49:31,729 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) [2020-10-19 18:49:31,777 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 18:49:31,779 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:49:31,780 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:49:31,780 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:49:31,780 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:49:31,781 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:49:31,782 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:49:31,782 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:49:31,784 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 18:49:31,828 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 18:49:31,830 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:49:31,830 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:49:31,831 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:49:31,831 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:49:31,836 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:49:31,836 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:49:31,840 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 18:49:31,878 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 18:49:31,880 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:49:31,880 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:49:31,881 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:49:31,881 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:49:31,893 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:49:31,893 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:49:31,909 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:49:31,965 INFO L443 ModelExtractionUtils]: Simplification made 12 calls to the SMT solver. [2020-10-19 18:49:31,965 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:49:31,982 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:49:31,986 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2020-10-19 18:49:31,986 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:49:31,987 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 18:49:32,034 INFO L297 tatePredicateManager]: 2 out of 3 supporting invariants were superfluous and have been removed [2020-10-19 18:49:32,046 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-10-19 18:49:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:49:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:49:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:49:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:49:32,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:49:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:49:32,142 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 18:49:32,160 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 18:49:32,162 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2020-10-19 18:49:32,255 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 18:49:32,256 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 18:49:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:49:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2020-10-19 18:49:32,261 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 5 letters. Loop has 2 letters. [2020-10-19 18:49:32,262 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:49:32,263 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 7 letters. Loop has 2 letters. [2020-10-19 18:49:32,263 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:49:32,263 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 5 letters. Loop has 4 letters. [2020-10-19 18:49:32,264 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:49:32,265 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 37 transitions. [2020-10-19 18:49:32,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:49:32,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 10 states and 13 transitions. [2020-10-19 18:49:32,275 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-19 18:49:32,275 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-19 18:49:32,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-10-19 18:49:32,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:49:32,277 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-19 18:49:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-10-19 18:49:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-19 18:49:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 18:49:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-10-19 18:49:32,310 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-19 18:49:32,311 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-19 18:49:32,311 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:49:32,311 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2020-10-19 18:49:32,312 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:49:32,312 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:49:32,312 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:49:32,312 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:49:32,313 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:49:32,313 INFO L794 eck$LassoCheckResult]: Stem: 112#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 108#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~post207, main_#t~mem209, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 109#L367 assume !(main_~length~0 < 1); 113#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 114#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 115#L370-3 assume !(main_~i~0 < main_~length~0); 111#L370-4 main_~j~0 := 0; 110#L374-2 [2020-10-19 18:49:32,313 INFO L796 eck$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 + (1 + main_#t~mem209);havoc main_#t~mem209; 110#L374-2 [2020-10-19 18:49:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:32,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815505, now seen corresponding path program 1 times [2020-10-19 18:49:32,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:32,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059856600] [2020-10-19 18:49:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:49:32,370 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 18:49:32,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059856600] [2020-10-19 18:49:32,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:49:32,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:49:32,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597542422] [2020-10-19 18:49:32,376 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:49:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash 68, now seen corresponding path program 1 times [2020-10-19 18:49:32,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:32,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754834566] [2020-10-19 18:49:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,390 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,392 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:49:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:49:32,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:49:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:49:32,432 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-10-19 18:49:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:49:32,464 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2020-10-19 18:49:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:49:32,465 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2020-10-19 18:49:32,466 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:49:32,467 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 13 transitions. [2020-10-19 18:49:32,467 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-19 18:49:32,467 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-19 18:49:32,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 13 transitions. [2020-10-19 18:49:32,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:49:32,468 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-10-19 18:49:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 13 transitions. [2020-10-19 18:49:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-10-19 18:49:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 18:49:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-10-19 18:49:32,470 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-10-19 18:49:32,471 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-10-19 18:49:32,471 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:49:32,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2020-10-19 18:49:32,472 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:49:32,472 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:49:32,472 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:49:32,473 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:49:32,473 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:49:32,473 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 18:49:32,473 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 + (1 + main_#t~mem209);havoc main_#t~mem209; 136#L374-2 [2020-10-19 18:49:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1182969107, now seen corresponding path program 1 times [2020-10-19 18:49:32,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:32,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494350446] [2020-10-19 18:49:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,489 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,502 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,506 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:49:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 68, now seen corresponding path program 2 times [2020-10-19 18:49:32,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:32,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246175639] [2020-10-19 18:49:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,514 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,520 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:49:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:49:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1982663310, now seen corresponding path program 1 times [2020-10-19 18:49:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:49:32,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927988272] [2020-10-19 18:49:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:49:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,536 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:49:32,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:49:32,554 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:49:32,718 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-19 18:49:32,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:49:32 BoogieIcfgContainer [2020-10-19 18:49:32,804 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:49:32,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:49:32,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:49:32,805 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:49:32,805 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:49:30" (3/4) ... [2020-10-19 18:49:32,809 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:49:32,855 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:49:32,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:49:32,857 INFO L168 Benchmark]: Toolchain (without parser) took 3425.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 953.2 MB in the beginning and 873.7 MB in the end (delta: 79.6 MB). Peak memory consumption was 204.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:49:32,858 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:49:32,859 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -150.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:49:32,859 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.06 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 18:49:32,860 INFO L168 Benchmark]: Boogie Preprocessor took 28.25 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 18:49:32,860 INFO L168 Benchmark]: RCFGBuilder took 304.82 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:49:32,861 INFO L168 Benchmark]: BuchiAutomizer took 2311.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 873.7 MB in the end (delta: 206.6 MB). Peak memory consumption was 206.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:49:32,861 INFO L168 Benchmark]: Witness Printer took 50.98 ms. Allocated memory is still 1.2 GB. Free memory is still 873.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:49:32,865 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 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 670.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -150.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 49.06 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. * Boogie Preprocessor took 28.25 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 304.82 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2311.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 873.7 MB in the end (delta: 206.6 MB). Peak memory consumption was 206.6 MB. Max. memory is 11.5 GB. * Witness Printer took 50.98 ms. Allocated memory is still 1.2 GB. Free memory is still 873.7 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 2.2s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 1.8s. 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: 21ms 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@197ddbd5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@61e5b5f7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e2e2112=0, length=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@76fda19=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e2e2112=2, j=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@328254be=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