./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Ex06.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Ex06.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3ac2445d235ff9d71a6974ac9afce215f9983492 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:19:05,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:19:05,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:19:05,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:19:05,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:19:05,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:19:05,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:19:05,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:19:05,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:19:05,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:19:05,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:19:05,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:19:05,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:19:05,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:19:05,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:19:05,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:19:05,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:19:05,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:19:05,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:19:05,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:19:05,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:19:05,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:19:05,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:19:05,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:19:05,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:19:05,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:19:05,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:19:05,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:19:05,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:19:05,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:19:05,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:19:05,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:19:05,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:19:05,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:19:05,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:19:05,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:19:05,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:19:05,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:19:05,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:19:05,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:19:05,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:19:05,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 19:19:05,564 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:19:05,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:19:05,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:19:05,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:19:05,567 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:19:05,567 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 19:19:05,567 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 19:19:05,568 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 19:19:05,568 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 19:19:05,568 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 19:19:05,569 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 19:19:05,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:19:05,569 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:19:05,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:19:05,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:19:05,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 19:19:05,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 19:19:05,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 19:19:05,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:19:05,571 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 19:19:05,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:19:05,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 19:19:05,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:19:05,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:19:05,572 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 19:19:05,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:19:05,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:19:05,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:19:05,573 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 19:19:05,575 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 19:19:05,575 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_b5a21088-a278-44ad-a184-4408f7efc14b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ac2445d235ff9d71a6974ac9afce215f9983492 [2020-11-29 19:19:05,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:19:05,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:19:05,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:19:05,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:19:05,841 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:19:05,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/Ex06.c [2020-11-29 19:19:05,935 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/data/f2184a648/d2e3dc1b11e44cc79ca4efcaac4224be/FLAG5b75dbc3d [2020-11-29 19:19:06,524 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:19:06,525 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/sv-benchmarks/c/termination-restricted-15/Ex06.c [2020-11-29 19:19:06,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/data/f2184a648/d2e3dc1b11e44cc79ca4efcaac4224be/FLAG5b75dbc3d [2020-11-29 19:19:06,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/data/f2184a648/d2e3dc1b11e44cc79ca4efcaac4224be [2020-11-29 19:19:06,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:19:06,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:19:06,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:19:06,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:19:06,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:19:06,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:19:06" (1/1) ... [2020-11-29 19:19:06,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf5a3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:06, skipping insertion in model container [2020-11-29 19:19:06,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:19:06" (1/1) ... [2020-11-29 19:19:06,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:19:06,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:19:07,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:19:07,127 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:19:07,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:19:07,169 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:19:07,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07 WrapperNode [2020-11-29 19:19:07,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:19:07,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:19:07,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:19:07,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:19:07,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:19:07,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:19:07,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:19:07,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:19:07,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... [2020-11-29 19:19:07,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:19:07,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:19:07,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:19:07,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:19:07,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:07,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:19:07,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:19:07,484 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:19:07,485 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 19:19:07,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:19:07 BoogieIcfgContainer [2020-11-29 19:19:07,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:19:07,488 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 19:19:07,488 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 19:19:07,492 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 19:19:07,493 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:19:07,493 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 07:19:06" (1/3) ... [2020-11-29 19:19:07,494 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1fa50691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:19:07, skipping insertion in model container [2020-11-29 19:19:07,495 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:19:07,495 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:19:07" (2/3) ... [2020-11-29 19:19:07,495 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1fa50691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:19:07, skipping insertion in model container [2020-11-29 19:19:07,496 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:19:07,496 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:19:07" (3/3) ... [2020-11-29 19:19:07,497 INFO L373 chiAutomizerObserver]: Analyzing ICFG Ex06.c [2020-11-29 19:19:07,565 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 19:19:07,566 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 19:19:07,566 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 19:19:07,566 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:19:07,566 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:19:07,566 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 19:19:07,566 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:19:07,567 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 19:19:07,580 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:19:07,599 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:19:07,599 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:19:07,599 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:19:07,605 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:19:07,605 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:19:07,605 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 19:19:07,605 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:19:07,607 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:19:07,607 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:19:07,608 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:19:07,608 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:19:07,608 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:19:07,615 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 5#L13-1true [2020-11-29 19:19:07,616 INFO L796 eck$LassoCheckResult]: Loop: 5#L13-1true assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 3#L10true assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 9#L10-2true assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 5#L13-1true [2020-11-29 19:19:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 19:19:07,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:07,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501566026] [2020-11-29 19:19:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:07,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:07,736 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:07,754 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash 39823, now seen corresponding path program 1 times [2020-11-29 19:19:07,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:07,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123981937] [2020-11-29 19:19:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:19:07,915 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 19:19:07,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123981937] [2020-11-29 19:19:07,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:19:07,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:19:07,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642883454] [2020-11-29 19:19:07,922 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:19:07,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:19:07,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:19:07,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:19:07,955 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-11-29 19:19:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:19:08,086 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-11-29 19:19:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:19:08,088 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 18 transitions. [2020-11-29 19:19:08,090 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-11-29 19:19:08,093 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 7 states and 10 transitions. [2020-11-29 19:19:08,096 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-29 19:19:08,096 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 19:19:08,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-11-29 19:19:08,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:19:08,097 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-29 19:19:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-11-29 19:19:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 19:19:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 19:19:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-11-29 19:19:08,138 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-29 19:19:08,139 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-29 19:19:08,139 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 19:19:08,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-11-29 19:19:08,140 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-11-29 19:19:08,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:19:08,140 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:19:08,140 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:19:08,140 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:19:08,141 INFO L794 eck$LassoCheckResult]: Stem: 35#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 36#L13-1 [2020-11-29 19:19:08,141 INFO L796 eck$LassoCheckResult]: Loop: 36#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 32#L10 assume !(main_~i~0 > 0); 34#L10-2 assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 36#L13-1 [2020-11-29 19:19:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-29 19:19:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:08,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517695722] [2020-11-29 19:19:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,147 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,150 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:08,151 INFO L82 PathProgramCache]: Analyzing trace with hash 39885, now seen corresponding path program 1 times [2020-11-29 19:19:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:08,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648695981] [2020-11-29 19:19:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,159 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,168 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,169 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 1 times [2020-11-29 19:19:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:08,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902813259] [2020-11-29 19:19:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,194 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,198 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:08,282 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:19:08,286 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:19:08,286 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:19:08,286 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:19:08,286 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:19:08,287 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:08,288 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:19:08,288 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:19:08,289 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration2_Loop [2020-11-29 19:19:08,289 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:19:08,289 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:19:08,312 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 19:19:08,337 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 19:19:08,344 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 19:19:08,431 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:19:08,432 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:08,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:19:08,439 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:08,487 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:19:08,487 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:08,497 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:19:08,536 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:19:08,536 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:19:08,536 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:19:08,536 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:19:08,536 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:19:08,536 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:08,537 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:19:08,537 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:19:08,537 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration2_Loop [2020-11-29 19:19:08,537 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:19:08,537 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:19:08,539 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 19:19:08,556 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 19:19:08,563 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 19:19:08,686 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:19:08,691 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:19:08,704 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 19:19:08,707 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:19:08,707 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:19:08,708 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:19:08,708 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:19:08,708 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:19:08,714 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:19:08,714 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:08,720 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:19:08,728 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 19:19:08,728 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:19:08,738 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:19:08,739 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:19:08,740 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:19:08,740 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:08,780 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:19:08,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:19:08,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:19:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:19:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:19:08,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:19:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:19:08,839 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 19:19:08,842 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:19:08,843 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-29 19:19:08,884 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 16 states and 22 transitions. Complement of second has 5 states. [2020-11-29 19:19:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:19:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:19:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-29 19:19:08,888 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 3 letters. [2020-11-29 19:19:08,889 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:19:08,889 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 19:19:08,890 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:19:08,890 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 6 letters. [2020-11-29 19:19:08,890 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:19:08,890 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 22 transitions. [2020-11-29 19:19:08,892 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-11-29 19:19:08,894 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 18 transitions. [2020-11-29 19:19:08,894 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-29 19:19:08,894 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-29 19:19:08,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2020-11-29 19:19:08,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:19:08,895 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2020-11-29 19:19:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2020-11-29 19:19:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2020-11-29 19:19:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 19:19:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2020-11-29 19:19:08,898 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2020-11-29 19:19:08,898 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2020-11-29 19:19:08,899 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 19:19:08,899 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2020-11-29 19:19:08,899 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:19:08,900 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:19:08,900 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:19:08,900 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 19:19:08,900 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:19:08,901 INFO L794 eck$LassoCheckResult]: Stem: 91#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 92#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 87#L10 [2020-11-29 19:19:08,901 INFO L796 eck$LassoCheckResult]: Loop: 87#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 88#L10-2 assume !(main_~i~0 < 0); 93#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 87#L10 [2020-11-29 19:19:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 19:19:08,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:08,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132314361] [2020-11-29 19:19:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,908 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,912 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 42945, now seen corresponding path program 1 times [2020-11-29 19:19:08,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:08,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105838445] [2020-11-29 19:19:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,925 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash 29863736, now seen corresponding path program 1 times [2020-11-29 19:19:08,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:08,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554269361] [2020-11-29 19:19:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:08,938 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:08,939 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:08,976 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:19:08,976 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:19:08,976 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:19:08,976 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:19:08,976 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:19:08,976 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:08,976 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:19:08,976 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:19:08,976 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration3_Loop [2020-11-29 19:19:08,977 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:19:08,977 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:19:08,978 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 19:19:08,984 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 19:19:08,989 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 19:19:09,128 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:19:09,128 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:09,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:19:09,144 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:09,149 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:19:09,149 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:09,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:19:09,196 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:09,200 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:19:09,200 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:09,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:19:09,242 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:09,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:19:09,288 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:09,331 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:19:09,333 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:19:09,333 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:19:09,334 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:19:09,334 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:19:09,334 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:19:09,334 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:09,334 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:19:09,334 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:19:09,334 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration3_Loop [2020-11-29 19:19:09,334 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:19:09,334 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:19:09,336 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 19:19:09,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:19:09,359 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 19:19:09,447 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:19:09,448 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:09,457 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 19:19:09,459 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:19:09,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:19:09,460 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:19:09,460 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:09,467 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:19:09,468 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:19:09,474 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:09,524 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 19:19:09,526 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:19:09,526 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:19:09,526 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:19:09,527 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:19:09,535 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:19:09,535 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 19:19:09,542 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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 19:19:09,588 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 19:19:09,589 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:19:09,590 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:19:09,590 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:19:09,590 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:19:09,590 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:19:09,592 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:19:09,592 INFO L402 nArgumentSynthesizer]: A total of 0 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 19:19:09,597 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:19:09,602 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:19:09,602 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/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) [2020-11-29 19:19:09,608 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:19:09,609 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:19:09,609 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:19:09,609 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:19:09,634 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:19:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:19:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:19:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:19:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:19:09,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:19:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:19:09,866 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 19:19:09,866 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 19:19:09,866 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-29 19:19:09,891 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 21 states and 28 transitions. Complement of second has 5 states. [2020-11-29 19:19:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:19:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:19:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-11-29 19:19:09,894 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 3 letters. [2020-11-29 19:19:09,894 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:19:09,894 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-29 19:19:09,894 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:19:09,894 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-29 19:19:09,895 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:19:09,895 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 28 transitions. [2020-11-29 19:19:09,896 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-11-29 19:19:09,897 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 27 transitions. [2020-11-29 19:19:09,897 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-29 19:19:09,897 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-29 19:19:09,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 27 transitions. [2020-11-29 19:19:09,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:19:09,897 INFO L691 BuchiCegarLoop]: Abstraction has 20 states and 27 transitions. [2020-11-29 19:19:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 27 transitions. [2020-11-29 19:19:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2020-11-29 19:19:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 19:19:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2020-11-29 19:19:09,904 INFO L714 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2020-11-29 19:19:09,904 INFO L594 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2020-11-29 19:19:09,904 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 19:19:09,904 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 23 transitions. [2020-11-29 19:19:09,905 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-11-29 19:19:09,905 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:19:09,905 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:19:09,905 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 19:19:09,905 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:19:09,906 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 158#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 166#L10 assume !(main_~i~0 > 0); 153#L10-2 [2020-11-29 19:19:09,906 INFO L796 eck$LassoCheckResult]: Loop: 153#L10-2 assume !(main_~i~0 < 0); 162#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 152#L10 assume !(main_~i~0 > 0); 153#L10-2 [2020-11-29 19:19:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-11-29 19:19:09,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:09,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578989234] [2020-11-29 19:19:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:09,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:09,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:09,915 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 50297, now seen corresponding path program 1 times [2020-11-29 19:19:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:09,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815226212] [2020-11-29 19:19:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:09,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:09,922 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:09,923 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:19:09,924 INFO L82 PathProgramCache]: Analyzing trace with hash 925835413, now seen corresponding path program 1 times [2020-11-29 19:19:09,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:19:09,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429840316] [2020-11-29 19:19:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:19:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:09,928 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:19:09,931 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:19:09,932 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:19:10,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 07:19:10 BoogieIcfgContainer [2020-11-29 19:19:10,029 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 19:19:10,030 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:19:10,030 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:19:10,030 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:19:10,030 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:19:07" (3/4) ... [2020-11-29 19:19:10,033 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 19:19:10,071 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b5a21088-a278-44ad-a184-4408f7efc14b/bin/uautomizer/witness.graphml [2020-11-29 19:19:10,072 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:19:10,078 INFO L168 Benchmark]: Toolchain (without parser) took 3178.70 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 69.1 MB in the beginning and 54.9 MB in the end (delta: 14.2 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:19:10,078 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:19:10,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.28 ms. Allocated memory is still 96.5 MB. Free memory was 68.9 MB in the beginning and 75.2 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:19:10,080 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.32 ms. Allocated memory is still 96.5 MB. Free memory was 75.2 MB in the beginning and 74.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:19:10,080 INFO L168 Benchmark]: Boogie Preprocessor took 21.00 ms. Allocated memory is still 96.5 MB. Free memory was 74.0 MB in the beginning and 73.3 MB in the end (delta: 757.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:19:10,081 INFO L168 Benchmark]: RCFGBuilder took 259.39 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 65.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:19:10,082 INFO L168 Benchmark]: BuchiAutomizer took 2541.50 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 65.0 MB in the beginning and 56.1 MB in the end (delta: 8.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:19:10,083 INFO L168 Benchmark]: Witness Printer took 42.06 ms. Allocated memory is still 117.4 MB. Free memory was 56.1 MB in the beginning and 54.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:19:10,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 274.28 ms. Allocated memory is still 96.5 MB. Free memory was 68.9 MB in the beginning and 75.2 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.32 ms. Allocated memory is still 96.5 MB. Free memory was 75.2 MB in the beginning and 74.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.00 ms. Allocated memory is still 96.5 MB. Free memory was 74.0 MB in the beginning and 73.3 MB in the end (delta: 757.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 259.39 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 65.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2541.50 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 65.0 MB in the beginning and 56.1 MB in the end (delta: 8.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. * Witness Printer took 42.06 ms. Allocated memory is still 117.4 MB. Free memory was 56.1 MB in the beginning and 54.9 MB in the end (delta: 1.2 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 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 3 locations. One deterministic module has affine ranking function i and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 16 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.4s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.8s. Construction of modules took 0.1s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 16 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 14 SDslu, 3 SDs, 0 SdLazy, 30 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax186 hnf100 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq143 hnf94 smp100 dnf100 smp100 tf110 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@67ffbd22=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE i >= -5 && i <= 5 [L10] COND FALSE !(i > 0) Loop: [L13] COND FALSE !(i < 0) [L9] COND TRUE i >= -5 && i <= 5 [L10] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...