./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/termination-15/array20_alloca_false-termination.c.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-15/array20_alloca_false-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/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 0.1.23-1dbac8b [2018-10-27 06:08:04,031 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:08:04,032 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:08:04,044 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:08:04,045 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:08:04,046 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:08:04,049 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:08:04,051 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:08:04,054 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:08:04,056 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:08:04,059 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:08:04,059 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:08:04,060 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:08:04,063 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:08:04,073 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:08:04,074 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:08:04,075 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:08:04,076 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:08:04,077 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:08:04,081 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:08:04,082 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:08:04,083 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:08:04,084 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:08:04,085 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:08:04,085 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:08:04,086 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:08:04,091 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:08:04,091 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:08:04,092 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:08:04,093 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:08:04,093 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:08:04,093 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:08:04,097 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:08:04,097 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:08:04,098 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:08:04,100 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:08:04,101 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-10-27 06:08:04,115 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:08:04,115 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:08:04,116 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 06:08:04,117 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 06:08:04,117 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 06:08:04,117 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-10-27 06:08:04,117 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-10-27 06:08:04,117 INFO L133 SettingsManager]: * Use old map elimination=false [2018-10-27 06:08:04,117 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-10-27 06:08:04,117 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-10-27 06:08:04,118 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-10-27 06:08:04,119 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:08:04,119 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 06:08:04,119 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:08:04,119 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:08:04,119 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-10-27 06:08:04,120 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-10-27 06:08:04,120 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-10-27 06:08:04,120 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:08:04,120 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-10-27 06:08:04,120 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-10-27 06:08:04,120 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:08:04,121 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:08:04,121 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-10-27 06:08:04,121 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:08:04,121 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 06:08:04,121 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-10-27 06:08:04,124 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-27 06:08:04,124 INFO L133 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/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 [2018-10-27 06:08:04,152 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:08:04,166 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:08:04,169 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:08:04,172 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:08:04,172 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:08:04,173 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/../../sv-benchmarks/c/termination-15/array20_alloca_false-termination.c.i [2018-10-27 06:08:04,223 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/data/fe0cfc15d/015dd74ad043497580e0f8807b3ffe4a/FLAG273d3889a [2018-10-27 06:08:04,668 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:08:04,668 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/sv-benchmarks/c/termination-15/array20_alloca_false-termination.c.i [2018-10-27 06:08:04,677 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/data/fe0cfc15d/015dd74ad043497580e0f8807b3ffe4a/FLAG273d3889a [2018-10-27 06:08:04,691 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/data/fe0cfc15d/015dd74ad043497580e0f8807b3ffe4a [2018-10-27 06:08:04,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:08:04,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 06:08:04,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:08:04,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:08:04,701 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:08:04,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:08:04" (1/1) ... [2018-10-27 06:08:04,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5225189a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:04, skipping insertion in model container [2018-10-27 06:08:04,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:08:04" (1/1) ... [2018-10-27 06:08:04,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:08:04,745 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:08:05,033 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:08:05,045 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:08:05,100 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:08:05,159 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:08:05,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05 WrapperNode [2018-10-27 06:08:05,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:08:05,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:08:05,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:08:05,161 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:08:05,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:08:05,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:08:05,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:08:05,270 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:08:05,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... [2018-10-27 06:08:05,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:08:05,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:08:05,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:08:05,295 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:08:05,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/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 [2018-10-27 06:08:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-27 06:08:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-27 06:08:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:08:05,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:08:05,831 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:08:05,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:08:05 BoogieIcfgContainer [2018-10-27 06:08:05,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:08:05,832 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-10-27 06:08:05,832 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-10-27 06:08:05,837 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-10-27 06:08:05,838 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:08:05,838 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.10 06:08:04" (1/3) ... [2018-10-27 06:08:05,839 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1ca96dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:08:05, skipping insertion in model container [2018-10-27 06:08:05,839 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:08:05,839 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:05" (2/3) ... [2018-10-27 06:08:05,840 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1ca96dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:08:05, skipping insertion in model container [2018-10-27 06:08:05,840 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:08:05,840 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:08:05" (3/3) ... [2018-10-27 06:08:05,842 INFO L375 chiAutomizerObserver]: Analyzing ICFG array20_alloca_false-termination.c.i [2018-10-27 06:08:05,902 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 06:08:05,903 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-10-27 06:08:05,903 INFO L375 BuchiCegarLoop]: Hoare is false [2018-10-27 06:08:05,903 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-10-27 06:08:05,903 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:08:05,904 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:08:05,904 INFO L379 BuchiCegarLoop]: Difference is false [2018-10-27 06:08:05,904 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:08:05,904 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-10-27 06:08:05,923 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-10-27 06:08:05,951 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2018-10-27 06:08:05,952 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:05,953 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:05,961 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2018-10-27 06:08:05,962 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:05,962 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-10-27 06:08:05,962 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-10-27 06:08:05,964 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2018-10-27 06:08:05,965 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:05,965 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:05,966 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2018-10-27 06:08:05,966 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:05,975 INFO L793 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 11#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 23#L367true assume !(main_~length~0 < 1); 6#L367-2true #Ultimate.alloc_old_#length, #Ultimate.alloc_old_#valid := #length, #valid;assume { :begin_inline_#Ultimate.alloc } true;#Ultimate.alloc_~size := main_~length~0 * 4;havoc #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;havoc #valid, #length;assume #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base] == 0;assume #valid == #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base := 1];assume #Ultimate.alloc_#res.offset == 0;assume #Ultimate.alloc_#res.base != 0;assume #length == #Ultimate.alloc_old_#length[#Ultimate.alloc_#res.base := #Ultimate.alloc_~size];main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;assume { :end_inline_#Ultimate.alloc } true;main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 19#L369true assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 4#L370-4true [2018-10-27 06:08:05,977 INFO L795 eck$LassoCheckResult]: Loop: 4#L370-4true assume true; 20#L370-1true assume !!(main_~i~0 < main_~length~0); 14#L371true SUMMARY for call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L371 16#L371-1true havoc main_#t~nondet208; 12#L372true SUMMARY for call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L372 15#L372-1true assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 24#L370-3true main_#t~post207 := main_~i~0;main_~i~0 := main_#t~post207 + 1;havoc main_#t~post207; 4#L370-4true [2018-10-27 06:08:05,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:05,986 INFO L82 PathProgramCache]: Analyzing trace with hash 28695753, now seen corresponding path program 1 times [2018-10-27 06:08:05,988 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:05,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:06,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:06,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:06,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:06,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:06,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1219413173, now seen corresponding path program 1 times [2018-10-27 06:08:06,123 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:06,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:06,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:06,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:06,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:06,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1949010195, now seen corresponding path program 1 times [2018-10-27 06:08:06,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:06,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:06,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:06,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:06,600 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-10-27 06:08:06,702 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2018-10-27 06:08:06,714 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:06,715 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:06,716 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:06,716 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:06,716 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:08:06,716 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:06,716 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:06,716 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:06,716 INFO L131 ssoRankerPreferences]: Filename of dumped script: array20_alloca_false-termination.c.i_Iteration1_Lasso [2018-10-27 06:08:06,717 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:06,717 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:06,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:06,746 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:06,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:06,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:07,015 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2018-10-27 06:08:07,191 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-27 06:08:07,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:07,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:07,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:07,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:07,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:07,601 WARN L179 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-27 06:08:07,851 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:07,855 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:08:07,856 INFO L122 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 [2018-10-27 06:08:07,858 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:07,858 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:07,859 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:07,859 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:07,859 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:07,861 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:07,862 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:07,865 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:07,865 INFO L122 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 [2018-10-27 06:08:07,866 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:07,866 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:07,866 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:07,867 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:07,867 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:07,867 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:07,867 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:07,868 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:07,869 INFO L122 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 [2018-10-27 06:08:07,869 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:07,870 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:07,870 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:07,870 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:07,870 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:07,871 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:07,871 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:07,872 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:07,872 INFO L122 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 [2018-10-27 06:08:07,873 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:07,873 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:07,873 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:07,873 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:07,876 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-10-27 06:08:07,876 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-10-27 06:08:07,885 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:07,886 INFO L122 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 [2018-10-27 06:08:07,887 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:07,887 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:07,887 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:07,887 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:07,889 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-10-27 06:08:07,889 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-10-27 06:08:07,894 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:07,895 INFO L122 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 [2018-10-27 06:08:07,895 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:07,896 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:07,896 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:07,896 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:07,902 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-10-27 06:08:07,902 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-10-27 06:08:07,962 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:08:08,026 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2018-10-27 06:08:08,027 INFO L444 ModelExtractionUtils]: 22 out of 28 variables were initially zero. Simplification set additionally 2 variables to zero. [2018-10-27 06:08:08,029 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:08:08,031 INFO L440 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2018-10-27 06:08:08,032 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:08:08,032 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(v_rep(select #length ULTIMATE.start_main_~arr~0.base)_1, ULTIMATE.start_main_~arr~0.offset, ULTIMATE.start_main_~i~0) = 1*v_rep(select #length ULTIMATE.start_main_~arr~0.base)_1 - 1*ULTIMATE.start_main_~arr~0.offset - 4*ULTIMATE.start_main_~i~0 Supporting invariants [] [2018-10-27 06:08:08,059 INFO L297 tatePredicateManager]: 3 out of 3 supporting invariants were superfluous and have been removed [2018-10-27 06:08:08,064 WARN L1239 BoogieBacktranslator]: unknown boogie variable #length [2018-10-27 06:08:08,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:08,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:08,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:08,216 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2018-10-27 06:08:08,217 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 4 states. [2018-10-27 06:08:08,286 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states.. Second operand 4 states. Result 51 states and 61 transitions. Complement of second has 7 states. [2018-10-27 06:08:08,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-10-27 06:08:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-27 06:08:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2018-10-27 06:08:08,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 40 transitions. Stem has 5 letters. Loop has 7 letters. [2018-10-27 06:08:08,291 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:08,292 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 40 transitions. Stem has 12 letters. Loop has 7 letters. [2018-10-27 06:08:08,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:08,292 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 40 transitions. Stem has 5 letters. Loop has 14 letters. [2018-10-27 06:08:08,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:08,293 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 61 transitions. [2018-10-27 06:08:08,296 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:08:08,299 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 20 states and 24 transitions. [2018-10-27 06:08:08,300 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-10-27 06:08:08,300 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-10-27 06:08:08,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 24 transitions. [2018-10-27 06:08:08,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:08,301 INFO L705 BuchiCegarLoop]: Abstraction has 20 states and 24 transitions. [2018-10-27 06:08:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 24 transitions. [2018-10-27 06:08:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-27 06:08:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-27 06:08:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2018-10-27 06:08:08,325 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 24 transitions. [2018-10-27 06:08:08,325 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 24 transitions. [2018-10-27 06:08:08,325 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-10-27 06:08:08,326 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 24 transitions. [2018-10-27 06:08:08,326 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:08:08,327 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:08,327 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:08,327 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:08,327 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:08:08,327 INFO L793 eck$LassoCheckResult]: Stem: 167#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 161#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 162#L367 assume !(main_~length~0 < 1); 157#L367-2 #Ultimate.alloc_old_#length, #Ultimate.alloc_old_#valid := #length, #valid;assume { :begin_inline_#Ultimate.alloc } true;#Ultimate.alloc_~size := main_~length~0 * 4;havoc #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;havoc #valid, #length;assume #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base] == 0;assume #valid == #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base := 1];assume #Ultimate.alloc_#res.offset == 0;assume #Ultimate.alloc_#res.base != 0;assume #length == #Ultimate.alloc_old_#length[#Ultimate.alloc_#res.base := #Ultimate.alloc_~size];main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;assume { :end_inline_#Ultimate.alloc } true;main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 158#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 150#L370-4 assume true; 152#L370-1 assume !(main_~i~0 < main_~length~0); 156#L370-5 main_~j~0 := 1; 149#L377-3 [2018-10-27 06:08:08,328 INFO L795 eck$LassoCheckResult]: Loop: 149#L377-3 assume true; 154#L377-1 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0); 155#L378 SUMMARY for call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + main_~j~0 * 4, 4); srcloc: L378 148#L378-1 main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 149#L377-3 [2018-10-27 06:08:08,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:08,328 INFO L82 PathProgramCache]: Analyzing trace with hash 176703706, now seen corresponding path program 1 times [2018-10-27 06:08:08,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:08,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:08,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:08,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:08,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:08:08,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 06:08:08,391 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:08:08,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2222440, now seen corresponding path program 1 times [2018-10-27 06:08:08,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:08,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:08,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:08,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,395 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 06:08:08,396 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 06:08:08,396 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 06:08:08,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:08,622 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-27 06:08:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 06:08:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 06:08:08,655 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. cyclomatic complexity: 6 Second operand 4 states. [2018-10-27 06:08:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:08:08,687 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2018-10-27 06:08:08,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 06:08:08,688 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 32 transitions. [2018-10-27 06:08:08,690 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:08:08,691 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 27 states and 31 transitions. [2018-10-27 06:08:08,691 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-10-27 06:08:08,691 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-10-27 06:08:08,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2018-10-27 06:08:08,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:08,692 INFO L705 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-10-27 06:08:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2018-10-27 06:08:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-27 06:08:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-27 06:08:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2018-10-27 06:08:08,694 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 23 transitions. [2018-10-27 06:08:08,694 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 23 transitions. [2018-10-27 06:08:08,694 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-10-27 06:08:08,694 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 23 transitions. [2018-10-27 06:08:08,695 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:08:08,695 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:08,695 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:08,696 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:08,696 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:08:08,696 INFO L793 eck$LassoCheckResult]: Stem: 222#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 218#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;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; 219#L367 assume !(main_~length~0 < 1); 212#L367-2 #Ultimate.alloc_old_#length, #Ultimate.alloc_old_#valid := #length, #valid;assume { :begin_inline_#Ultimate.alloc } true;#Ultimate.alloc_~size := main_~length~0 * 4;havoc #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;havoc #valid, #length;assume #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base] == 0;assume #valid == #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base := 1];assume #Ultimate.alloc_#res.offset == 0;assume #Ultimate.alloc_#res.base != 0;assume #length == #Ultimate.alloc_old_#length[#Ultimate.alloc_#res.base := #Ultimate.alloc_~size];main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;assume { :end_inline_#Ultimate.alloc } true;main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 213#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 205#L370-4 assume true; 206#L370-1 assume !!(main_~i~0 < main_~length~0); 220#L371 SUMMARY for call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L371 221#L371-1 havoc main_#t~nondet208; 216#L372 SUMMARY for call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L372 217#L372-1 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 215#L370-3 main_#t~post207 := main_~i~0;main_~i~0 := main_#t~post207 + 1;havoc main_#t~post207; 207#L370-4 assume true; 208#L370-1 assume !(main_~i~0 < main_~length~0); 211#L370-5 main_~j~0 := 1; 204#L377-3 [2018-10-27 06:08:08,696 INFO L795 eck$LassoCheckResult]: Loop: 204#L377-3 assume true; 209#L377-1 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0); 210#L378 SUMMARY for call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + main_~j~0 * 4, 4); srcloc: L378 203#L378-1 main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 204#L377-3 [2018-10-27 06:08:08,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash 700173366, now seen corresponding path program 1 times [2018-10-27 06:08:08,697 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:08,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:08,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:08,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:08,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2222440, now seen corresponding path program 2 times [2018-10-27 06:08:08,719 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:08,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:08,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:08,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,722 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 06:08:08,723 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 06:08:08,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 06:08:08,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 06:08:08,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-27 06:08:08,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-10-27 06:08:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:08,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:08,788 INFO L82 PathProgramCache]: Analyzing trace with hash 302158621, now seen corresponding path program 1 times [2018-10-27 06:08:08,789 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:08,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:08,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:08,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:08,797 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 06:08:08,797 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 06:08:08,797 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 06:08:08,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:08,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:09,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:08:09,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-27 06:08:09,278 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-27 06:08:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:08:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:08:09,308 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. cyclomatic complexity: 5 Second operand 6 states. [2018-10-27 06:08:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:08:09,425 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2018-10-27 06:08:09,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 06:08:09,426 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 52 states and 59 transitions. [2018-10-27 06:08:09,427 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:08:09,428 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 52 states to 35 states and 39 transitions. [2018-10-27 06:08:09,428 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-10-27 06:08:09,429 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-10-27 06:08:09,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 39 transitions. [2018-10-27 06:08:09,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:09,429 INFO L705 BuchiCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-10-27 06:08:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states and 39 transitions. [2018-10-27 06:08:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-27 06:08:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-27 06:08:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-10-27 06:08:09,432 INFO L728 BuchiCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-10-27 06:08:09,432 INFO L608 BuchiCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-10-27 06:08:09,432 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-10-27 06:08:09,432 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 31 transitions. [2018-10-27 06:08:09,433 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:08:09,433 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:09,433 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:09,434 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:09,434 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:08:09,434 INFO L793 eck$LassoCheckResult]: Stem: 365#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 361#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;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; 362#L367 assume !(main_~length~0 < 1); 355#L367-2 #Ultimate.alloc_old_#length, #Ultimate.alloc_old_#valid := #length, #valid;assume { :begin_inline_#Ultimate.alloc } true;#Ultimate.alloc_~size := main_~length~0 * 4;havoc #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;havoc #valid, #length;assume #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base] == 0;assume #valid == #Ultimate.alloc_old_#valid[#Ultimate.alloc_#res.base := 1];assume #Ultimate.alloc_#res.offset == 0;assume #Ultimate.alloc_#res.base != 0;assume #length == #Ultimate.alloc_old_#length[#Ultimate.alloc_#res.base := #Ultimate.alloc_~size];main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.alloc_#res.base, #Ultimate.alloc_#res.offset;assume { :end_inline_#Ultimate.alloc } true;main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 356#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 348#L370-4 assume true; 349#L370-1 assume !!(main_~i~0 < main_~length~0); 373#L371 SUMMARY for call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L371 372#L371-1 havoc main_#t~nondet208; 359#L372 SUMMARY for call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L372 360#L372-1 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 358#L370-3 main_#t~post207 := main_~i~0;main_~i~0 := main_#t~post207 + 1;havoc main_#t~post207; 350#L370-4 assume true; 351#L370-1 assume !!(main_~i~0 < main_~length~0); 363#L371 SUMMARY for call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L371 364#L371-1 havoc main_#t~nondet208; 366#L372 SUMMARY for call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + main_~i~0 * 4, 4); srcloc: L372 370#L372-1 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 369#L370-3 main_#t~post207 := main_~i~0;main_~i~0 := main_#t~post207 + 1;havoc main_#t~post207; 368#L370-4 assume true; 367#L370-1 assume !(main_~i~0 < main_~length~0); 354#L370-5 main_~j~0 := 1; 347#L377-3 [2018-10-27 06:08:09,434 INFO L795 eck$LassoCheckResult]: Loop: 347#L377-3 assume true; 352#L377-1 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0); 353#L378 SUMMARY for call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + main_~j~0 * 4, 4); srcloc: L378 346#L378-1 main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 347#L377-3 [2018-10-27 06:08:09,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1442117286, now seen corresponding path program 2 times [2018-10-27 06:08:09,435 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:09,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:09,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:09,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:09,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:09,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2222440, now seen corresponding path program 3 times [2018-10-27 06:08:09,460 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:09,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:09,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:09,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:09,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:09,463 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 06:08:09,463 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 06:08:09,463 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 06:08:09,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 06:08:09,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-10-27 06:08:09,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-10-27 06:08:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:09,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash 812031553, now seen corresponding path program 2 times [2018-10-27 06:08:09,525 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:09,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:09,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:09,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:09,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:09,537 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 06:08:09,546 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 06:08:09,546 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 06:08:09,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 06:08:09,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 06:08:09,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-10-27 06:08:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:10,245 WARN L179 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2018-10-27 06:08:10,326 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 06:08:10,326 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 06:08:10,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.10 06:08:10 BoogieIcfgContainer [2018-10-27 06:08:10,336 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-10-27 06:08:10,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 06:08:10,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 06:08:10,336 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 06:08:10,337 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:08:05" (3/4) ... [2018-10-27 06:08:10,339 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2018-10-27 06:08:10,374 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7b7c4320-6a86-435a-9c82-d1302aef327b/bin-2019/uautomizer/witness.graphml [2018-10-27 06:08:10,374 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 06:08:10,374 INFO L168 Benchmark]: Toolchain (without parser) took 5679.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 957.0 MB in the beginning and 1.1 GB in the end (delta: -141.9 MB). Peak memory consumption was 8.6 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:10,375 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:08:10,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 463.37 ms. Allocated memory is still 1.0 GB. Free memory was 957.0 MB in the beginning and 930.1 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:10,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 108.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 930.1 MB in the beginning and 1.1 GB in the end (delta: -214.4 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:10,377 INFO L168 Benchmark]: Boogie Preprocessor took 24.24 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:10,377 INFO L168 Benchmark]: RCFGBuilder took 537.40 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:10,378 INFO L168 Benchmark]: BuchiAutomizer took 4503.34 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: 24.9 MB). Peak memory consumption was 247.0 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:10,378 INFO L168 Benchmark]: Witness Printer took 37.87 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: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-10-27 06:08:10,380 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 463.37 ms. Allocated memory is still 1.0 GB. Free memory was 957.0 MB in the beginning and 930.1 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 108.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 930.1 MB in the beginning and 1.1 GB in the end (delta: -214.4 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.24 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 537.40 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4503.34 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: 24.9 MB). Peak memory consumption was 247.0 MB. Max. memory is 11.5 GB. * Witness Printer took 37.87 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: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled * 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 unknown-#length-unknown[arr] + -1 * arr + -4 * i and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 6 locations. The remainder module has 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.4s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 3.9s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 3. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 48 SDtfs, 101 SDslu, 69 SDs, 0 SdLazy, 76 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT0 SILN0 SILU1 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital121 mio100 ax100 hnf99 lsp94 ukn87 mio100 lsp54 div100 bol100 ite100 ukn100 eq174 hnf90 smp100 dnf100 smp100 tf100 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 13ms VariablesStem: 2 VariablesLoop: 2 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. [2018-10-27 06:08:10,393 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 06:08:10,393 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 06:08:10,394 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 06:08:10,394 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {NULL=0, \result=0, arr=5, arr=0, i=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@412cc992=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@534c26c2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5a5dee30=0, length=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@5192a8f0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5a5dee30=5, j=1, NULL=0, NULL=8, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@41e7a4de=0, NULL=0, NULL=5, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@21521bd3=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] EXPR, FCALL __builtin_alloca(length*sizeof(int)) [L368] int *arr = __builtin_alloca(length*sizeof(int)); [L369] COND FALSE !(!arr) [L370] i=0 [L370] COND TRUE i