./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loops/nec11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loops/nec11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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 32bit --witnessprinter.graph.data.programhash 5edcfc0376a9e6be0c706a9b358eb1360b076159 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 21:12:33,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:12:33,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:12:33,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:12:33,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:12:33,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:12:33,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:12:33,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:12:33,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:12:33,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:12:33,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:12:33,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:12:33,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:12:33,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:12:33,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:12:33,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:12:33,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:12:33,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:12:33,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:12:33,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:12:33,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:12:33,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:12:33,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:12:33,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:12:33,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:12:33,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:12:33,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:12:33,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:12:33,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:12:33,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:12:33,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:12:33,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:12:33,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:12:33,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:12:33,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:12:33,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:12:33,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:12:33,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:12:33,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:12:33,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:12:33,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:12:33,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 21:12:33,744 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:12:33,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:12:33,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:12:33,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:12:33,746 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:12:33,746 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 21:12:33,747 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 21:12:33,747 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 21:12:33,747 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 21:12:33,747 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 21:12:33,747 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 21:12:33,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:12:33,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:12:33,748 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:12:33,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:12:33,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:12:33,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:12:33,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 21:12:33,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 21:12:33,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 21:12:33,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:12:33,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:12:33,750 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 21:12:33,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:12:33,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 21:12:33,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:12:33,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:12:33,751 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 21:12:33,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:12:33,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:12:33,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:12:33,752 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 21:12:33,753 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 21:12:33,753 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_26bde751-7046-4899-a919-99299d43e0d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5edcfc0376a9e6be0c706a9b358eb1360b076159 [2020-11-29 21:12:34,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:12:34,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:12:34,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:12:34,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:12:34,051 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:12:34,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/../../sv-benchmarks/c/loops/nec11.c [2020-11-29 21:12:34,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/data/351be9ff7/7df544e6ce7f401abcb0b7f1736371bd/FLAGae10eb708 [2020-11-29 21:12:34,498 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:12:34,499 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/sv-benchmarks/c/loops/nec11.c [2020-11-29 21:12:34,504 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/data/351be9ff7/7df544e6ce7f401abcb0b7f1736371bd/FLAGae10eb708 [2020-11-29 21:12:34,914 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/data/351be9ff7/7df544e6ce7f401abcb0b7f1736371bd [2020-11-29 21:12:34,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:12:34,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:12:34,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:12:34,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:12:34,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:12:34,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:12:34" (1/1) ... [2020-11-29 21:12:34,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5457f37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:34, skipping insertion in model container [2020-11-29 21:12:34,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:12:34" (1/1) ... [2020-11-29 21:12:34,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:12:34,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:12:35,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:12:35,128 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:12:35,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:12:35,157 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:12:35,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35 WrapperNode [2020-11-29 21:12:35,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:12:35,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:12:35,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:12:35,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:12:35,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:12:35,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:12:35,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:12:35,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:12:35,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... [2020-11-29 21:12:35,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:12:35,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:12:35,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:12:35,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:12:35,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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 21:12:35,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:12:35,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:12:35,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:12:35,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:12:35,479 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:12:35,479 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 21:12:35,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:12:35 BoogieIcfgContainer [2020-11-29 21:12:35,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:12:35,482 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 21:12:35,482 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 21:12:35,499 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 21:12:35,500 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:12:35,500 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 09:12:34" (1/3) ... [2020-11-29 21:12:35,514 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4bea91bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:12:35, skipping insertion in model container [2020-11-29 21:12:35,514 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:12:35,515 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:12:35" (2/3) ... [2020-11-29 21:12:35,515 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4bea91bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:12:35, skipping insertion in model container [2020-11-29 21:12:35,515 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:12:35,515 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:12:35" (3/3) ... [2020-11-29 21:12:35,517 INFO L373 chiAutomizerObserver]: Analyzing ICFG nec11.c [2020-11-29 21:12:35,560 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 21:12:35,560 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 21:12:35,561 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 21:12:35,561 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:12:35,561 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:12:35,561 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 21:12:35,561 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:12:35,561 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 21:12:35,573 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-11-29 21:12:35,622 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 21:12:35,622 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:12:35,623 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:12:35,628 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 21:12:35,628 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:12:35,628 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 21:12:35,629 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-11-29 21:12:35,630 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 21:12:35,630 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:12:35,630 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:12:35,631 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 21:12:35,631 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:12:35,637 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7#L-1true havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 6#L21-2true [2020-11-29 21:12:35,638 INFO L796 eck$LassoCheckResult]: Loop: 6#L21-2true assume !!(0 != main_~c~0 % 256); 11#L23true assume !(4 == main_~len~0); 9#L23-2true assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 6#L21-2true [2020-11-29 21:12:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-29 21:12:35,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:35,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488928606] [2020-11-29 21:12:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:35,805 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:35,846 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:35,873 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash 40876, now seen corresponding path program 1 times [2020-11-29 21:12:35,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:35,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254534229] [2020-11-29 21:12:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:35,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:35,887 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:35,890 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 28699818, now seen corresponding path program 1 times [2020-11-29 21:12:35,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:35,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483672631] [2020-11-29 21:12:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:35,912 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:35,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:35,942 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:36,313 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-11-29 21:12:36,419 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:12:36,420 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:12:36,420 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:12:36,420 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:12:36,420 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:12:36,421 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:36,421 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:12:36,421 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:12:36,421 INFO L133 ssoRankerPreferences]: Filename of dumped script: nec11.c_Iteration1_Lasso [2020-11-29 21:12:36,421 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:12:36,421 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:12:36,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:12:36,460 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 21:12:36,467 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 21:12:36,562 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 21:12:36,564 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 21:12:36,568 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 21:12:36,572 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 21:12:36,576 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 21:12:36,597 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 21:12:36,603 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 21:12:36,607 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 21:12:36,936 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:12:36,942 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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 21:12:36,956 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 21:12:36,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:36,958 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:36,959 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:36,959 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:36,970 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:36,970 INFO L402 nArgumentSynthesizer]: A total of 2 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 21:12:36,976 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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 21:12:37,017 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 21:12:37,019 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,019 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:12:37,019 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,020 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,020 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,021 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:12:37,021 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 21:12:37,023 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,063 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 21:12:37,064 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,064 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,064 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,064 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,069 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,070 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 21:12:37,074 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,105 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 21:12:37,107 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,107 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,107 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,107 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,110 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,110 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 21:12:37,117 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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) [2020-11-29 21:12:37,160 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 21:12:37,161 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,162 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,162 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,162 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,165 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,165 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,169 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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) [2020-11-29 21:12:37,215 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 21:12:37,217 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,217 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,217 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,218 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,227 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,228 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,236 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,269 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 21:12:37,271 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,271 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,271 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,271 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,274 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,275 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 21:12:37,282 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:12:37,327 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 21:12:37,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,328 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,329 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,329 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,331 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,331 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,336 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:12:37,375 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 21:12:37,376 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,376 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,377 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,377 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,379 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,379 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,384 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:12:37,426 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 21:12:37,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,428 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,431 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,431 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,435 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:12:37,475 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 21:12:37,476 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,477 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,479 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,479 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,484 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 13 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,528 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 21:12:37,530 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,536 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,536 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 21:12:37,543 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:12:37,584 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 21:12:37,585 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,586 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,586 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,586 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,591 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,591 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,601 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 15 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,654 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 21:12:37,656 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,656 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:12:37,656 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,657 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,657 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,661 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:12:37,661 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:12:37,666 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 16 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,694 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 21:12:37,696 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,696 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,696 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,696 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,699 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,699 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 21:12:37,703 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,728 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 21:12:37,730 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,730 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:12:37,730 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,730 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,730 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,731 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:12:37,731 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:12:37,733 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 18 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,754 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 21:12:37,756 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,756 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:12:37,756 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,756 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,756 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,757 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:12:37,757 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:12:37,759 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 19 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,781 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 21:12:37,782 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,783 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:12:37,783 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,783 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,783 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,784 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:12:37,784 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:12:37,786 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 20 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,810 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 21:12:37,811 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:12:37,811 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:12:37,811 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:12:37,811 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:12:37,824 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 21:12:37,824 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 21:12:37,830 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:12:37,885 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2020-11-29 21:12:37,885 INFO L444 ModelExtractionUtils]: 2 out of 7 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:12:37,903 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:12:37,907 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2020-11-29 21:12:37,907 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:12:37,908 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~len~0) = -2*ULTIMATE.start_main_~len~0 + 7 Supporting invariants [] [2020-11-29 21:12:37,965 INFO L297 tatePredicateManager]: 7 out of 7 supporting invariants were superfluous and have been removed [2020-11-29 21:12:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:12:38,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 21:12:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:12:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:12:38,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 21:12:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:12:38,135 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 21:12:38,154 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 [2020-11-29 21:12:38,155 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2020-11-29 21:12:38,207 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states.. Second operand 4 states. Result 41 states and 51 transitions. Complement of second has 8 states. [2020-11-29 21:12:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:12:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 21:12:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2020-11-29 21:12:38,213 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 2 letters. Loop has 3 letters. [2020-11-29 21:12:38,213 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:12:38,213 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-29 21:12:38,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:12:38,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-29 21:12:38,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:12:38,215 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 41 states and 51 transitions. [2020-11-29 21:12:38,222 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 21:12:38,227 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 41 states to 10 states and 13 transitions. [2020-11-29 21:12:38,228 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-29 21:12:38,228 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 21:12:38,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-11-29 21:12:38,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:12:38,229 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-29 21:12:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-11-29 21:12:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 21:12:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 21:12:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-11-29 21:12:38,249 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-29 21:12:38,249 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-29 21:12:38,249 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 21:12:38,249 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2020-11-29 21:12:38,250 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 21:12:38,250 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:12:38,250 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:12:38,250 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 21:12:38,250 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:12:38,250 INFO L794 eck$LassoCheckResult]: Stem: 131#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 125#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 126#L21-2 assume !!(0 != main_~c~0 % 256); 132#L23 assume 4 == main_~len~0;main_~len~0 := 0; 127#L23-2 [2020-11-29 21:12:38,250 INFO L796 eck$LassoCheckResult]: Loop: 127#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 128#L21-2 assume !!(0 != main_~c~0 % 256); 134#L23 assume !(4 == main_~len~0); 127#L23-2 [2020-11-29 21:12:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2020-11-29 21:12:38,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:38,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372327296] [2020-11-29 21:12:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:12:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:38,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372327296] [2020-11-29 21:12:38,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:12:38,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:12:38,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431724778] [2020-11-29 21:12:38,306 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:12:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 2 times [2020-11-29 21:12:38,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:38,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116177263] [2020-11-29 21:12:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:38,313 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:38,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:38,320 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:12:38,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:12:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:12:38,387 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-29 21:12:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:12:38,400 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-29 21:12:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:12:38,401 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 16 transitions. [2020-11-29 21:12:38,402 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:12:38,403 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 13 states and 15 transitions. [2020-11-29 21:12:38,403 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-29 21:12:38,403 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-29 21:12:38,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2020-11-29 21:12:38,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:12:38,403 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-29 21:12:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2020-11-29 21:12:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2020-11-29 21:12:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 21:12:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-11-29 21:12:38,405 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-11-29 21:12:38,405 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-11-29 21:12:38,405 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 21:12:38,405 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2020-11-29 21:12:38,406 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 21:12:38,406 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:12:38,406 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:12:38,406 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2020-11-29 21:12:38,407 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:12:38,407 INFO L794 eck$LassoCheckResult]: Stem: 161#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 155#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 156#L21-2 assume !!(0 != main_~c~0 % 256); 163#L23 assume !(4 == main_~len~0); 159#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 160#L21-2 assume !!(0 != main_~c~0 % 256); 162#L23 assume 4 == main_~len~0;main_~len~0 := 0; 157#L23-2 [2020-11-29 21:12:38,407 INFO L796 eck$LassoCheckResult]: Loop: 157#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 158#L21-2 assume !!(0 != main_~c~0 % 256); 164#L23 assume !(4 == main_~len~0); 157#L23-2 [2020-11-29 21:12:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1810721677, now seen corresponding path program 1 times [2020-11-29 21:12:38,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:38,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174139295] [2020-11-29 21:12:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:12:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:38,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174139295] [2020-11-29 21:12:38,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003889537] [2020-11-29 21:12:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:12:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:12:38,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 21:12:38,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:12:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:38,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:12:38,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2020-11-29 21:12:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180898686] [2020-11-29 21:12:38,519 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:12:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 3 times [2020-11-29 21:12:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:38,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049650821] [2020-11-29 21:12:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:38,531 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:38,541 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:38,543 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:12:38,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:12:38,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:12:38,576 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. cyclomatic complexity: 4 Second operand 5 states. [2020-11-29 21:12:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:12:38,602 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-11-29 21:12:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:12:38,604 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2020-11-29 21:12:38,604 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 21:12:38,605 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 19 states and 21 transitions. [2020-11-29 21:12:38,605 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-29 21:12:38,605 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-29 21:12:38,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2020-11-29 21:12:38,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:12:38,605 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-29 21:12:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2020-11-29 21:12:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-11-29 21:12:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 21:12:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-29 21:12:38,608 INFO L714 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-29 21:12:38,608 INFO L594 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-29 21:12:38,608 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 21:12:38,608 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 18 transitions. [2020-11-29 21:12:38,609 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-29 21:12:38,609 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:12:38,609 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:12:38,611 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1] [2020-11-29 21:12:38,612 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1] [2020-11-29 21:12:38,612 INFO L794 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 211#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 212#L21-2 assume !!(0 != main_~c~0 % 256); 223#L23 assume !(4 == main_~len~0); 226#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 222#L21-2 assume !!(0 != main_~c~0 % 256); 220#L23 assume !(4 == main_~len~0); 215#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 216#L21-2 assume !!(0 != main_~c~0 % 256); 218#L23 assume 4 == main_~len~0;main_~len~0 := 0; 219#L23-2 [2020-11-29 21:12:38,620 INFO L796 eck$LassoCheckResult]: Loop: 219#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 225#L21-2 assume !!(0 != main_~c~0 % 256); 224#L23 assume !(4 == main_~len~0); 213#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 214#L21-2 assume !!(0 != main_~c~0 % 256); 221#L23 assume 4 == main_~len~0;main_~len~0 := 0; 219#L23-2 [2020-11-29 21:12:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1579681018, now seen corresponding path program 2 times [2020-11-29 21:12:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:38,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349891109] [2020-11-29 21:12:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:12:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:38,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349891109] [2020-11-29 21:12:38,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956602203] [2020-11-29 21:12:38,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:12:38,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:12:38,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:12:38,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 21:12:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:12:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:38,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:12:38,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 21:12:38,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263050819] [2020-11-29 21:12:38,760 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:12:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1413481439, now seen corresponding path program 1 times [2020-11-29 21:12:38,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:38,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160671346] [2020-11-29 21:12:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:38,773 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:38,787 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:38,792 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:12:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:12:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:12:38,857 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. cyclomatic complexity: 4 Second operand 6 states. [2020-11-29 21:12:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:12:38,883 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-29 21:12:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:12:38,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 28 transitions. [2020-11-29 21:12:38,885 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 21:12:38,886 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 25 states and 27 transitions. [2020-11-29 21:12:38,886 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2020-11-29 21:12:38,886 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-11-29 21:12:38,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 27 transitions. [2020-11-29 21:12:38,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:12:38,886 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-29 21:12:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 27 transitions. [2020-11-29 21:12:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-29 21:12:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 21:12:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-11-29 21:12:38,889 INFO L714 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-11-29 21:12:38,889 INFO L594 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-11-29 21:12:38,889 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 21:12:38,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 24 transitions. [2020-11-29 21:12:38,893 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 21:12:38,893 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:12:38,893 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:12:38,894 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 1, 1, 1] [2020-11-29 21:12:38,894 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 1] [2020-11-29 21:12:38,894 INFO L794 eck$LassoCheckResult]: Stem: 295#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 289#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 290#L21-2 assume !!(0 != main_~c~0 % 256); 301#L23 assume !(4 == main_~len~0); 310#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 309#L21-2 assume !!(0 != main_~c~0 % 256); 297#L23 assume !(4 == main_~len~0); 293#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 294#L21-2 assume !!(0 != main_~c~0 % 256); 300#L23 assume !(4 == main_~len~0); 306#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 305#L21-2 assume !!(0 != main_~c~0 % 256); 296#L23 assume 4 == main_~len~0;main_~len~0 := 0; 291#L23-2 [2020-11-29 21:12:38,894 INFO L796 eck$LassoCheckResult]: Loop: 291#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 292#L21-2 assume !!(0 != main_~c~0 % 256); 304#L23 assume !(4 == main_~len~0); 307#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 308#L21-2 assume !!(0 != main_~c~0 % 256); 302#L23 assume !(4 == main_~len~0); 303#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 298#L21-2 assume !!(0 != main_~c~0 % 256); 299#L23 assume 4 == main_~len~0;main_~len~0 := 0; 291#L23-2 [2020-11-29 21:12:38,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:38,895 INFO L82 PathProgramCache]: Analyzing trace with hash -320467731, now seen corresponding path program 3 times [2020-11-29 21:12:38,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:38,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274492841] [2020-11-29 21:12:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:12:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:38,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274492841] [2020-11-29 21:12:38,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718732447] [2020-11-29 21:12:38,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:12:39,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 21:12:39,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:12:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 21:12:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:12:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:39,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:12:39,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 21:12:39,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010073412] [2020-11-29 21:12:39,033 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:12:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1166256500, now seen corresponding path program 2 times [2020-11-29 21:12:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:39,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176215295] [2020-11-29 21:12:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,040 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,045 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,059 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:39,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:12:39,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:12:39,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:12:39,164 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. cyclomatic complexity: 4 Second operand 7 states. [2020-11-29 21:12:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:12:39,188 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-11-29 21:12:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:12:39,188 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 34 transitions. [2020-11-29 21:12:39,189 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2020-11-29 21:12:39,190 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 31 states and 33 transitions. [2020-11-29 21:12:39,190 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 21:12:39,191 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-29 21:12:39,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 33 transitions. [2020-11-29 21:12:39,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:12:39,191 INFO L691 BuchiCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-29 21:12:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 33 transitions. [2020-11-29 21:12:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-29 21:12:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 21:12:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-29 21:12:39,194 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-29 21:12:39,194 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-29 21:12:39,194 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 21:12:39,194 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 30 transitions. [2020-11-29 21:12:39,195 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-29 21:12:39,195 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:12:39,195 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:12:39,196 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 1, 1, 1] [2020-11-29 21:12:39,196 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1] [2020-11-29 21:12:39,196 INFO L794 eck$LassoCheckResult]: Stem: 395#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 389#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 390#L21-2 assume !!(0 != main_~c~0 % 256); 401#L23 assume !(4 == main_~len~0); 416#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 400#L21-2 assume !!(0 != main_~c~0 % 256); 397#L23 assume !(4 == main_~len~0); 393#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 394#L21-2 assume !!(0 != main_~c~0 % 256); 415#L23 assume !(4 == main_~len~0); 414#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 413#L21-2 assume !!(0 != main_~c~0 % 256); 408#L23 assume !(4 == main_~len~0); 409#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 407#L21-2 assume !!(0 != main_~c~0 % 256); 396#L23 assume 4 == main_~len~0;main_~len~0 := 0; 391#L23-2 [2020-11-29 21:12:39,196 INFO L796 eck$LassoCheckResult]: Loop: 391#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 392#L21-2 assume !!(0 != main_~c~0 % 256); 402#L23 assume !(4 == main_~len~0); 403#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 405#L21-2 assume !!(0 != main_~c~0 % 256); 406#L23 assume !(4 == main_~len~0); 412#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 411#L21-2 assume !!(0 != main_~c~0 % 256); 410#L23 assume !(4 == main_~len~0); 404#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 398#L21-2 assume !!(0 != main_~c~0 % 256); 399#L23 assume 4 == main_~len~0;main_~len~0 := 0; 391#L23-2 [2020-11-29 21:12:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash 658202022, now seen corresponding path program 4 times [2020-11-29 21:12:39,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:39,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740537798] [2020-11-29 21:12:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,256 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1957011391, now seen corresponding path program 3 times [2020-11-29 21:12:39,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:39,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770741852] [2020-11-29 21:12:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,281 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,299 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,302 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash -282022428, now seen corresponding path program 5 times [2020-11-29 21:12:39,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:39,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802222047] [2020-11-29 21:12:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,334 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:12:39,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:12:39,384 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:12:39,532 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-29 21:12:40,138 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2020-11-29 21:12:40,194 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2020-11-29 21:12:40,194 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:12:40,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:12:40,286 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:12:40,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:128, output treesize:133 [2020-11-29 21:12:40,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 09:12:40 BoogieIcfgContainer [2020-11-29 21:12:40,392 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 21:12:40,392 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:12:40,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:12:40,392 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:12:40,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:12:35" (3/4) ... [2020-11-29 21:12:40,395 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 21:12:40,437 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26bde751-7046-4899-a919-99299d43e0d6/bin/uautomizer/witness.graphml [2020-11-29 21:12:40,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:12:40,438 INFO L168 Benchmark]: Toolchain (without parser) took 5520.22 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 80.4 MB in the beginning and 36.0 MB in the end (delta: 44.4 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:12:40,439 INFO L168 Benchmark]: CDTParser took 0.74 ms. Allocated memory is still 83.9 MB. Free memory was 55.8 MB in the beginning and 55.7 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:12:40,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.53 ms. Allocated memory is still 111.1 MB. Free memory was 79.8 MB in the beginning and 88.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:12:40,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.05 ms. Allocated memory is still 111.1 MB. Free memory was 88.3 MB in the beginning and 86.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:12:40,440 INFO L168 Benchmark]: Boogie Preprocessor took 17.82 ms. Allocated memory is still 111.1 MB. Free memory was 86.7 MB in the beginning and 85.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:12:40,441 INFO L168 Benchmark]: RCFGBuilder took 260.78 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 74.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:12:40,441 INFO L168 Benchmark]: BuchiAutomizer took 4909.95 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 74.7 MB in the beginning and 38.1 MB in the end (delta: 36.6 MB). Peak memory consumption was 67.0 MB. Max. memory is 16.1 GB. [2020-11-29 21:12:40,442 INFO L168 Benchmark]: Witness Printer took 44.92 ms. Allocated memory is still 134.2 MB. Free memory was 38.1 MB in the beginning and 36.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:12:40,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74 ms. Allocated memory is still 83.9 MB. Free memory was 55.8 MB in the beginning and 55.7 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.53 ms. Allocated memory is still 111.1 MB. Free memory was 79.8 MB in the beginning and 88.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.05 ms. Allocated memory is still 111.1 MB. Free memory was 88.3 MB in the beginning and 86.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.82 ms. Allocated memory is still 111.1 MB. Free memory was 86.7 MB in the beginning and 85.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 260.78 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 74.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4909.95 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 74.7 MB in the beginning and 38.1 MB in the end (delta: 36.6 MB). Peak memory consumption was 67.0 MB. Max. memory is 16.1 GB. * Witness Printer took 44.92 ms. Allocated memory is still 134.2 MB. Free memory was 38.1 MB in the beginning and 36.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (4 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -2 * len + 7 and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 7 locations. The remainder module has 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.8s and 6 iterations. TraceHistogramMax:5. Analysis of lassos took 4.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 5. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 19 SDslu, 35 SDs, 0 SdLazy, 40 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU4 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital135 mio100 ax100 hnf100 lsp68 ukn47 mio100 lsp43 div236 bol100 ite100 ukn100 eq144 hnf49 smp78 dnf100 smp100 tf100 neg95 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms 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: 21]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=15214} State at position 1 is {NULL=0, NULL=0, NULL=0, NULL=15217, NULL=0, \result=0, NULL=15215, c=257, NULL=15214, i=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@267d3a20=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@6146051b=0, NULL=0, len=0, NULL=15216} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 23]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L15] int a[5]; [L16] int len=0; [L17] _Bool c=__VERIFIER_nondet_bool(); [L18] int i; [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND TRUE len==4 [L24] len =0 Loop: [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND TRUE len==4 [L24] len =0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...