./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-15/array20_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-15/array20_alloca.i -s /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer --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 15cc26ae0dc42c909592f114b7003fa240a2d07d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:55:22,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:55:22,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:55:22,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:55:22,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:55:22,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:55:22,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:55:22,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:55:22,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:55:22,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:55:22,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:55:22,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:55:22,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:55:22,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:55:22,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:55:22,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:55:22,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:55:22,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:55:22,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:55:22,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:55:22,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:55:22,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:55:22,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:55:22,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:55:22,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:55:22,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:55:22,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:55:22,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:55:22,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:55:22,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:55:22,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:55:22,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:55:22,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:55:22,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:55:22,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:55:22,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:55:22,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:55:22,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:55:22,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:55:22,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:55:22,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:55:22,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 23:55:22,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:55:22,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:55:22,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:55:22,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:55:22,362 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:55:22,363 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:55:22,363 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:55:22,363 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:55:22,363 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:55:22,363 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:55:22,364 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:55:22,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:55:22,364 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:55:22,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:55:22,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:55:22,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:55:22,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:55:22,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:55:22,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:55:22,366 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:55:22,366 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:55:22,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:55:22,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:55:22,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:55:22,367 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:55:22,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:55:22,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:55:22,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:55:22,367 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:55:22,369 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:55:22,369 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15cc26ae0dc42c909592f114b7003fa240a2d07d [2020-11-29 23:55:22,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:55:22,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:55:22,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:55:22,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:55:22,667 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:55:22,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/../../sv-benchmarks/c/termination-15/array20_alloca.i [2020-11-29 23:55:22,786 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/data/880614268/8d1747dd0301421798acbc7bd662a71d/FLAG48dd85e06 [2020-11-29 23:55:23,291 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:55:23,296 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/sv-benchmarks/c/termination-15/array20_alloca.i [2020-11-29 23:55:23,319 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/data/880614268/8d1747dd0301421798acbc7bd662a71d/FLAG48dd85e06 [2020-11-29 23:55:23,614 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/data/880614268/8d1747dd0301421798acbc7bd662a71d [2020-11-29 23:55:23,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:55:23,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:55:23,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:23,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:55:23,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:55:23,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:23" (1/1) ... [2020-11-29 23:55:23,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6401c1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:23, skipping insertion in model container [2020-11-29 23:55:23,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:23" (1/1) ... [2020-11-29 23:55:23,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:55:23,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:55:24,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:24,087 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:55:24,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:24,222 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:55:24,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24 WrapperNode [2020-11-29 23:55:24,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:24,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:24,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:55:24,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:55:24,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:24,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:55:24,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:55:24,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:55:24,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... [2020-11-29 23:55:24,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:55:24,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:55:24,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:55:24,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:55:24,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/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 [2020-11-29 23:55:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:55:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:55:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:55:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:55:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:55:24,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:55:24,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:55:24,617 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 23:55:24,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:24 BoogieIcfgContainer [2020-11-29 23:55:24,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:55:24,620 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:55:24,620 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:55:24,623 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:55:24,624 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:55:24,624 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:55:23" (1/3) ... [2020-11-29 23:55:24,625 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@12da3c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:55:24, skipping insertion in model container [2020-11-29 23:55:24,626 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:55:24,626 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:24" (2/3) ... [2020-11-29 23:55:24,626 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@12da3c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:55:24, skipping insertion in model container [2020-11-29 23:55:24,626 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:55:24,626 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:24" (3/3) ... [2020-11-29 23:55:24,628 INFO L373 chiAutomizerObserver]: Analyzing ICFG array20_alloca.i [2020-11-29 23:55:24,672 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:55:24,672 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:55:24,672 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:55:24,672 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:55:24,672 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:55:24,672 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:55:24,673 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:55:24,673 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:55:24,684 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 23:55:24,702 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-11-29 23:55:24,702 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:55:24,702 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:55:24,708 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-29 23:55:24,709 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:55:24,709 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:55:24,709 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 23:55:24,711 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-11-29 23:55:24,711 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:55:24,711 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:55:24,711 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-29 23:55:24,711 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:55:24,718 INFO L794 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 7#L-1true havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, 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; 15#L367true assume !(main_~length~0 < 1); 4#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; 12#L369true assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 16#L370-3true [2020-11-29 23:55:24,719 INFO L796 eck$LassoCheckResult]: Loop: 16#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;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 8#L372true assume main_#t~mem209 < 1;havoc main_#t~mem209;call write~int(1, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 14#L370-2true main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 16#L370-3true [2020-11-29 23:55:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 28695753, now seen corresponding path program 1 times [2020-11-29 23:55:24,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:24,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277385312] [2020-11-29 23:55:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:24,839 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:24,852 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:24,870 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 51737, now seen corresponding path program 1 times [2020-11-29 23:55:24,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:24,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108128214] [2020-11-29 23:55:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:24,887 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:24,898 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:24,901 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:24,903 INFO L82 PathProgramCache]: Analyzing trace with hash 176707665, now seen corresponding path program 1 times [2020-11-29 23:55:24,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:24,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105179096] [2020-11-29 23:55:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:24,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:24,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:24,953 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:25,223 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-11-29 23:55:25,290 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:55:25,291 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:55:25,291 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:55:25,291 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:55:25,292 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:55:25,292 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:55:25,292 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:55:25,292 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:55:25,293 INFO L133 ssoRankerPreferences]: Filename of dumped script: array20_alloca.i_Iteration1_Lasso [2020-11-29 23:55:25,293 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:55:25,294 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:55:25,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:55:25,766 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:55:25,772 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:55:25,786 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 [2020-11-29 23:55:25,789 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:55:25,789 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:55:25,790 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:55:25,790 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:55:25,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:55:25,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:55:25,795 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 [2020-11-29 23:55:25,798 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:55:25,839 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 [2020-11-29 23:55:25,841 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:55:25,842 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:55:25,842 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:55:25,842 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:55:25,842 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:55:25,843 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:55:25,844 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 [2020-11-29 23:55:25,846 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:55:25,889 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 [2020-11-29 23:55:25,891 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:55:25,891 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:55:25,891 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:55:25,891 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:55:25,892 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:55:25,893 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:55:25,893 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:55:25,896 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:55:25,938 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 [2020-11-29 23:55:25,940 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:55:25,941 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:55:25,941 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:55:25,941 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:55:25,949 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:55:25,949 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:55:25,955 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/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 [2020-11-29 23:55:25,987 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 [2020-11-29 23:55:25,989 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:55:25,989 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:55:25,989 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:55:25,989 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:55:25,989 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:55:25,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:55:25,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:55:25,994 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 7 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:55:26,026 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 [2020-11-29 23:55:26,028 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:55:26,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:55:26,029 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:55:26,029 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:55:26,042 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:55:26,042 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 23:55:26,056 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:55:26,121 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2020-11-29 23:55:26,121 INFO L444 ModelExtractionUtils]: 6 out of 22 variables were initially zero. Simplification set additionally 12 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:55:26,157 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:55:26,160 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2020-11-29 23:55:26,161 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:55:26,161 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, v_rep(select #length ULTIMATE.start_main_#t~malloc206.base)_1) = -4*ULTIMATE.start_main_~i~0 + 1*v_rep(select #length ULTIMATE.start_main_#t~malloc206.base)_1 Supporting invariants [1*ULTIMATE.start_main_~arr~0.offset >= 0] [2020-11-29 23:55:26,210 INFO L297 tatePredicateManager]: 2 out of 4 supporting invariants were superfluous and have been removed [2020-11-29 23:55:26,222 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-11-29 23:55:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:55:26,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:26,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:55:26,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:26,364 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 [2020-11-29 23:55:26,366 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2020-11-29 23:55:26,507 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 4 states. Result 29 states and 41 transitions. Complement of second has 9 states. [2020-11-29 23:55:26,509 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 [2020-11-29 23:55:26,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:55:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2020-11-29 23:55:26,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-29 23:55:26,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:55:26,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 8 letters. Loop has 3 letters. [2020-11-29 23:55:26,515 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:55:26,515 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 5 letters. Loop has 6 letters. [2020-11-29 23:55:26,515 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:55:26,517 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 41 transitions. [2020-11-29 23:55:26,525 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:55:26,529 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 11 states and 15 transitions. [2020-11-29 23:55:26,530 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-29 23:55:26,531 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-29 23:55:26,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 15 transitions. [2020-11-29 23:55:26,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:55:26,532 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-11-29 23:55:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 15 transitions. [2020-11-29 23:55:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 23:55:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 23:55:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2020-11-29 23:55:26,560 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-11-29 23:55:26,560 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-11-29 23:55:26,560 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:55:26,561 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 15 transitions. [2020-11-29 23:55:26,563 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:55:26,563 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:55:26,563 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:55:26,564 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:26,564 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 23:55:26,566 INFO L794 eck$LassoCheckResult]: Stem: 124#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 120#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, 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; 121#L367 assume !(main_~length~0 < 1); 125#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; 126#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 127#L370-3 assume !(main_~i~0 < main_~length~0); 122#L370-4 main_~j~0 := 1; 123#L377-2 [2020-11-29 23:55:26,567 INFO L796 eck$LassoCheckResult]: Loop: 123#L377-2 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 123#L377-2 [2020-11-29 23:55:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815510, now seen corresponding path program 1 times [2020-11-29 23:55:26,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:26,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767708320] [2020-11-29 23:55:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:26,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767708320] [2020-11-29 23:55:26,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:26,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:26,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393373312] [2020-11-29 23:55:26,652 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 23:55:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 1 times [2020-11-29 23:55:26,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:26,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883506284] [2020-11-29 23:55:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:26,658 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:26,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851905259] [2020-11-29 23:55:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:26,696 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:26,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:26,704 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:26,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:26,816 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-29 23:55:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:26,861 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2020-11-29 23:55:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:26,862 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 17 transitions. [2020-11-29 23:55:26,863 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:55:26,864 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 17 transitions. [2020-11-29 23:55:26,864 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-29 23:55:26,864 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-29 23:55:26,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2020-11-29 23:55:26,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:55:26,865 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-11-29 23:55:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2020-11-29 23:55:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-11-29 23:55:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 23:55:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2020-11-29 23:55:26,866 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-11-29 23:55:26,867 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-11-29 23:55:26,867 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:55:26,867 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2020-11-29 23:55:26,867 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:55:26,867 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:55:26,867 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:55:26,868 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:26,868 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 23:55:26,868 INFO L794 eck$LassoCheckResult]: Stem: 155#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 149#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 150#L367 assume !(main_~length~0 < 1); 156#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 157#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 158#L370-3 assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 151#L372 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 152#L370-2 main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 159#L370-3 assume !(main_~i~0 < main_~length~0); 153#L370-4 main_~j~0 := 1; 154#L377-2 [2020-11-29 23:55:26,868 INFO L796 eck$LassoCheckResult]: Loop: 154#L377-2 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 154#L377-2 [2020-11-29 23:55:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1982565540, now seen corresponding path program 1 times [2020-11-29 23:55:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:26,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309270213] [2020-11-29 23:55:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:26,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:26,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:26,934 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,935 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 2 times [2020-11-29 23:55:26,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:26,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595236401] [2020-11-29 23:55:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:26,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:26,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380369998] [2020-11-29 23:55:26,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:26,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 23:55:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 23:55:26,990 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:26,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:26,997 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1329989554, now seen corresponding path program 1 times [2020-11-29 23:55:26,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:26,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038225009] [2020-11-29 23:55:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:27,031 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:27,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772945321] [2020-11-29 23:55:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:55:27,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:27,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038225009] [2020-11-29 23:55:27,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:27,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772945321] [2020-11-29 23:55:27,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:27,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:55:27,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007999668] [2020-11-29 23:55:27,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:55:27,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:55:27,180 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. cyclomatic complexity: 5 Second operand 6 states. [2020-11-29 23:55:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:27,292 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-11-29 23:55:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:55:27,293 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2020-11-29 23:55:27,294 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:55:27,295 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 16 states and 20 transitions. [2020-11-29 23:55:27,295 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-29 23:55:27,295 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-29 23:55:27,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 20 transitions. [2020-11-29 23:55:27,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:55:27,296 INFO L691 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-11-29 23:55:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 20 transitions. [2020-11-29 23:55:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-11-29 23:55:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 23:55:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-11-29 23:55:27,297 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-11-29 23:55:27,298 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-11-29 23:55:27,298 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 23:55:27,298 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 17 transitions. [2020-11-29 23:55:27,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:55:27,298 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:55:27,298 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:55:27,299 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:27,299 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 23:55:27,299 INFO L794 eck$LassoCheckResult]: Stem: 237#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 233#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 234#L367 assume !(main_~length~0 < 1); 238#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 239#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 240#L370-3 assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 242#L372 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 244#L370-2 main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 243#L370-3 assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 231#L372 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 232#L370-2 main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 241#L370-3 assume !(main_~i~0 < main_~length~0); 235#L370-4 main_~j~0 := 1; 236#L377-2 [2020-11-29 23:55:27,299 INFO L796 eck$LassoCheckResult]: Loop: 236#L377-2 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 236#L377-2 [2020-11-29 23:55:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1781949270, now seen corresponding path program 2 times [2020-11-29 23:55:27,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:27,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614001992] [2020-11-29 23:55:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:27,331 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:27,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:27,373 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:27,376 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 3 times [2020-11-29 23:55:27,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:27,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134387940] [2020-11-29 23:55:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:27,380 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:27,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305421609] [2020-11-29 23:55:27,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:27,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-29 23:55:27,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 23:55:27,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:27,427 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:27,430 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:27,431 INFO L82 PathProgramCache]: Analyzing trace with hash -594147436, now seen corresponding path program 2 times [2020-11-29 23:55:27,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:27,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595363401] [2020-11-29 23:55:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:27,453 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:27,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719361837] [2020-11-29 23:55:27,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:27,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:27,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 23:55:27,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:27,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:27,530 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:27,988 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-11-29 23:55:28,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:55:28 BoogieIcfgContainer [2020-11-29 23:55:28,136 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:55:28,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:55:28,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:55:28,137 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:55:28,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:24" (3/4) ... [2020-11-29 23:55:28,140 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 23:55:28,175 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_664f287f-b5d4-40c1-afc5-f52fe4b748d1/bin/uautomizer/witness.graphml [2020-11-29 23:55:28,176 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:55:28,177 INFO L168 Benchmark]: Toolchain (without parser) took 4555.35 ms. Allocated memory was 81.8 MB in the beginning and 138.4 MB in the end (delta: 56.6 MB). Free memory was 47.8 MB in the beginning and 106.0 MB in the end (delta: -58.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:28,178 INFO L168 Benchmark]: CDTParser took 23.63 ms. Allocated memory is still 81.8 MB. Free memory was 41.1 MB in the beginning and 55.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:28,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.49 ms. Allocated memory was 81.8 MB in the beginning and 115.3 MB in the end (delta: 33.6 MB). Free memory was 47.6 MB in the beginning and 76.5 MB in the end (delta: -28.8 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:28,179 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.99 ms. Allocated memory is still 115.3 MB. Free memory was 76.5 MB in the beginning and 74.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:28,179 INFO L168 Benchmark]: Boogie Preprocessor took 24.20 ms. Allocated memory is still 115.3 MB. Free memory was 74.7 MB in the beginning and 73.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:28,180 INFO L168 Benchmark]: RCFGBuilder took 315.25 ms. Allocated memory is still 115.3 MB. Free memory was 73.4 MB in the beginning and 92.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:28,181 INFO L168 Benchmark]: BuchiAutomizer took 3516.35 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 92.3 MB in the beginning and 108.1 MB in the end (delta: -15.8 MB). Peak memory consumption was 67.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:28,181 INFO L168 Benchmark]: Witness Printer took 39.30 ms. Allocated memory is still 138.4 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:28,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 23.63 ms. Allocated memory is still 81.8 MB. Free memory was 41.1 MB in the beginning and 55.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 597.49 ms. Allocated memory was 81.8 MB in the beginning and 115.3 MB in the end (delta: 33.6 MB). Free memory was 47.6 MB in the beginning and 76.5 MB in the end (delta: -28.8 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.99 ms. Allocated memory is still 115.3 MB. Free memory was 76.5 MB in the beginning and 74.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.20 ms. Allocated memory is still 115.3 MB. Free memory was 74.7 MB in the beginning and 73.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 315.25 ms. Allocated memory is still 115.3 MB. Free memory was 73.4 MB in the beginning and 92.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3516.35 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 92.3 MB in the beginning and 108.1 MB in the end (delta: -15.8 MB). Peak memory consumption was 67.4 MB. Max. memory is 16.1 GB. * Witness Printer took 39.30 ms. Allocated memory is still 138.4 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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 3 terminating modules (2 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -4 * i + unknown-#length-unknown[__builtin_alloca(length*sizeof(int))] and consists of 6 locations. 2 modules have a trivial ranking function, the largest among these consists of 6 locations. The remainder module has 14 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.4s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.8s. Construction of modules took 0.1s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 3. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 53 SDslu, 27 SDs, 0 SdLazy, 62 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT0 SILN0 SILU1 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital103 mio100 ax100 hnf99 lsp91 ukn80 mio100 lsp63 div100 bol100 ite100 ukn100 eq166 hnf91 smp100 dnf100 smp100 tf100 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms 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: 377]: 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=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2009bc31=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1a86ffd7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@83397e7=0, length=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@1e84995c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@83397e7=2, j=1, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@96a925e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@34436855=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 377]: 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