./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/AlternKonv.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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/AlternKonv.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 475cf88887990488194ca7f61a6d05f74a450e7b ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:56:17,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:56:17,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:56:17,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:56:17,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:56:17,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:56:17,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:56:17,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:56:17,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:56:17,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:56:17,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:56:17,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:56:17,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:56:17,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:56:17,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:56:17,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:56:17,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:56:17,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:56:17,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:56:17,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:56:17,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:56:17,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:56:17,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:56:17,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:56:17,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:56:17,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:56:17,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:56:17,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:56:17,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:56:17,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:56:17,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:56:17,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:56:17,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:56:17,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:56:17,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:56:17,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:56:17,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:56:17,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:56:17,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:56:17,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:56:17,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:56:17,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 23:56:17,547 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:56:17,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:56:17,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:56:17,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:56:17,553 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:56:17,553 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:56:17,553 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:56:17,553 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:56:17,553 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:56:17,553 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:56:17,555 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:56:17,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:56:17,555 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:56:17,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:56:17,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:56:17,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:56:17,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:56:17,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:56:17,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:56:17,556 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:56:17,557 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:56:17,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:56:17,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:56:17,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:56:17,558 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:56:17,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:56:17,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:56:17,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:56:17,559 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:56:17,560 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:56:17,560 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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 475cf88887990488194ca7f61a6d05f74a450e7b [2020-11-29 23:56:17,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:56:17,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:56:17,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:56:17,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:56:17,857 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:56:17,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2020-11-29 23:56:17,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/data/aa803f065/0a48730d2e124b93ac86ab5d79d0a726/FLAG0b823b4a9 [2020-11-29 23:56:18,374 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:56:18,375 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2020-11-29 23:56:18,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/data/aa803f065/0a48730d2e124b93ac86ab5d79d0a726/FLAG0b823b4a9 [2020-11-29 23:56:18,760 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/data/aa803f065/0a48730d2e124b93ac86ab5d79d0a726 [2020-11-29 23:56:18,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:56:18,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:56:18,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:56:18,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:56:18,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:56:18,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:56:18" (1/1) ... [2020-11-29 23:56:18,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e5f2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:18, skipping insertion in model container [2020-11-29 23:56:18,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:56:18" (1/1) ... [2020-11-29 23:56:18,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:56:18,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:56:18,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:56:18,966 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:56:18,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:56:19,013 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:56:19,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19 WrapperNode [2020-11-29 23:56:19,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:56:19,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:56:19,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:56:19,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:56:19,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:56:19,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:56:19,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:56:19,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:56:19,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... [2020-11-29 23:56:19,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:56:19,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:56:19,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:56:19,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:56:19,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:56:19,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:56:19,302 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:56:19,302 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 23:56:19,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:56:19 BoogieIcfgContainer [2020-11-29 23:56:19,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:56:19,304 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:56:19,305 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:56:19,308 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:56:19,309 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:56:19,309 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:56:18" (1/3) ... [2020-11-29 23:56:19,310 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@169513b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:56:19, skipping insertion in model container [2020-11-29 23:56:19,311 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:56:19,311 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:19" (2/3) ... [2020-11-29 23:56:19,311 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@169513b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:56:19, skipping insertion in model container [2020-11-29 23:56:19,311 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:56:19,311 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:56:19" (3/3) ... [2020-11-29 23:56:19,313 INFO L373 chiAutomizerObserver]: Analyzing ICFG AlternKonv.c [2020-11-29 23:56:19,380 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:56:19,380 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:56:19,380 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:56:19,381 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:56:19,381 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:56:19,381 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:56:19,381 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:56:19,381 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:56:19,408 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states. [2020-11-29 23:56:19,447 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:56:19,447 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:19,448 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:19,454 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 23:56:19,454 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:56:19,454 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:56:19,454 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states. [2020-11-29 23:56:19,456 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:56:19,456 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:19,456 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:19,456 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 23:56:19,456 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:56:19,464 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#L18-2true [2020-11-29 23:56:19,464 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-2true assume !!(0 != main_~i~0); 3#L10true assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 6#L12true assume !(main_~i~0 < 0); 5#L18-2true [2020-11-29 23:56:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 23:56:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:19,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234316956] [2020-11-29 23:56:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:19,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:19,559 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:19,574 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash 39827, now seen corresponding path program 1 times [2020-11-29 23:56:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:19,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961601897] [2020-11-29 23:56:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:19,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:19,595 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:19,596 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:19,598 INFO L82 PathProgramCache]: Analyzing trace with hash 963348, now seen corresponding path program 1 times [2020-11-29 23:56:19,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:19,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738136166] [2020-11-29 23:56:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:19,607 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:19,613 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:19,614 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:19,721 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:19,721 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:19,722 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:19,722 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:19,722 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:56:19,722 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:19,722 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:19,722 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:19,723 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2020-11-29 23:56:19,723 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:19,723 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:19,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:19,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:19,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:19,855 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:19,856 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:19,869 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:19,869 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 [2020-11-29 23:56:19,879 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:56:19,879 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:19,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:19,917 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 23:56:19,925 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:56:19,925 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:19,962 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:19,963 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:19,988 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:56:19,988 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:56:20,023 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:56:20,025 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:20,025 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:20,026 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:20,026 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:20,026 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:56:20,026 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:20,026 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:20,026 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:20,026 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2020-11-29 23:56:20,026 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:20,026 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:20,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:20,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:20,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:20,158 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:20,162 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:20,176 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:20,179 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:20,179 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:20,179 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:20,179 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:56:20,185 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:56:20,185 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 23:56:20,191 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:20,223 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:20,225 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:20,225 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:20,225 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:20,225 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:56:20,229 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:56:20,229 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 23:56:20,234 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:20,280 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:20,282 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:20,282 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:56:20,283 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:20,283 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:20,283 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:56:20,284 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:56:20,285 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:20,294 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:56:20,298 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 23:56:20,298 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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:20,332 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:56:20,333 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:56:20,333 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:56:20,333 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-11-29 23:56:20,368 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:56:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:20,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:56:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:20,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:56:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:20,564 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 23:56:20,566 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states. Second operand 4 states. [2020-11-29 23:56:20,617 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states.. Second operand 4 states. Result 32 states and 45 transitions. Complement of second has 6 states. [2020-11-29 23:56:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:56:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:56:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2020-11-29 23:56:20,621 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 3 letters. [2020-11-29 23:56:20,622 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:20,622 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 23:56:20,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:20,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 6 letters. [2020-11-29 23:56:20,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:20,624 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 45 transitions. [2020-11-29 23:56:20,629 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:56:20,632 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 14 states and 20 transitions. [2020-11-29 23:56:20,633 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-29 23:56:20,634 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-29 23:56:20,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2020-11-29 23:56:20,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:56:20,635 INFO L691 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 23:56:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2020-11-29 23:56:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2020-11-29 23:56:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 23:56:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2020-11-29 23:56:20,659 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2020-11-29 23:56:20,659 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2020-11-29 23:56:20,659 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:56:20,659 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2020-11-29 23:56:20,659 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:56:20,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:20,660 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:20,660 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 23:56:20,660 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:56:20,660 INFO L794 eck$LassoCheckResult]: Stem: 85#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; 86#L18-2 assume !!(0 != main_~i~0); 79#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 80#L18 [2020-11-29 23:56:20,660 INFO L796 eck$LassoCheckResult]: Loop: 80#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 89#L18-2 assume !!(0 != main_~i~0); 90#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 80#L18 [2020-11-29 23:56:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,661 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 1 times [2020-11-29 23:56:20,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:20,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137019181] [2020-11-29 23:56:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,667 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,670 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,672 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash 57996, now seen corresponding path program 1 times [2020-11-29 23:56:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563480326] [2020-11-29 23:56:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563480326] [2020-11-29 23:56:20,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:20,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-29 23:56:20,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446954532] [2020-11-29 23:56:20,704 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 23:56:20,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:56:20,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:56:20,709 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. cyclomatic complexity: 8 Second operand 3 states. [2020-11-29 23:56:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:20,765 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2020-11-29 23:56:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:56:20,765 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 20 transitions. [2020-11-29 23:56:20,766 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 23:56:20,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 14 states and 20 transitions. [2020-11-29 23:56:20,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-29 23:56:20,767 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-29 23:56:20,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2020-11-29 23:56:20,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:56:20,768 INFO L691 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 23:56:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2020-11-29 23:56:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-29 23:56:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 23:56:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2020-11-29 23:56:20,770 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 23:56:20,770 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 23:56:20,770 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:56:20,770 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2020-11-29 23:56:20,770 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 23:56:20,771 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:20,771 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:20,771 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 23:56:20,771 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:56:20,771 INFO L794 eck$LassoCheckResult]: Stem: 115#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 116#L18-2 assume !!(0 != main_~i~0); 111#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 112#L18 [2020-11-29 23:56:20,771 INFO L796 eck$LassoCheckResult]: Loop: 112#L18 assume !(main_~i~0 > 0); 122#L18-2 assume !!(0 != main_~i~0); 124#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 112#L18 [2020-11-29 23:56:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 2 times [2020-11-29 23:56:20,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:20,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907559819] [2020-11-29 23:56:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,778 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,781 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,782 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash 59918, now seen corresponding path program 1 times [2020-11-29 23:56:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:20,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679725314] [2020-11-29 23:56:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:20,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679725314] [2020-11-29 23:56:20,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:20,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:56:20,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389810803] [2020-11-29 23:56:20,823 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 23:56:20,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:56:20,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:56:20,824 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-11-29 23:56:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:20,858 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2020-11-29 23:56:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:56:20,859 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 22 transitions. [2020-11-29 23:56:20,860 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 23:56:20,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 22 transitions. [2020-11-29 23:56:20,860 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-29 23:56:20,861 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-11-29 23:56:20,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2020-11-29 23:56:20,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:56:20,861 INFO L691 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2020-11-29 23:56:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2020-11-29 23:56:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-11-29 23:56:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 23:56:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2020-11-29 23:56:20,863 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 23:56:20,863 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 23:56:20,863 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 23:56:20,863 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2020-11-29 23:56:20,864 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 23:56:20,864 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:20,864 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:20,865 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 23:56:20,865 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2020-11-29 23:56:20,865 INFO L794 eck$LassoCheckResult]: Stem: 152#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; 153#L18-2 assume !!(0 != main_~i~0); 148#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 149#L18 [2020-11-29 23:56:20,865 INFO L796 eck$LassoCheckResult]: Loop: 149#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 154#L18-2 assume !!(0 != main_~i~0); 155#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 157#L12 assume !(main_~i~0 < 0); 159#L18-2 assume !!(0 != main_~i~0); 161#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 149#L18 [2020-11-29 23:56:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 3 times [2020-11-29 23:56:20,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:20,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330153141] [2020-11-29 23:56:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,871 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,875 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,876 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1727393992, now seen corresponding path program 1 times [2020-11-29 23:56:20,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:20,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801097426] [2020-11-29 23:56:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash 684415735, now seen corresponding path program 1 times [2020-11-29 23:56:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:20,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639662456] [2020-11-29 23:56:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,907 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:20,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:20,915 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:20,996 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:20,997 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:20,997 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:20,997 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:20,997 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:56:20,997 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:20,997 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:20,997 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:20,997 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration4_Loop [2020-11-29 23:56:20,997 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:20,997 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:20,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,011 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,105 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:21,105 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:21,110 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:21,110 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:21,117 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:56:21,118 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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:21,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:21,166 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:21,171 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:56:21,171 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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:21,203 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:21,203 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:21,229 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:56:21,229 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:56:21,242 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:56:21,262 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:21,263 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:21,263 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:21,263 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:21,263 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:56:21,263 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:21,263 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:21,263 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:21,263 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration4_Loop [2020-11-29 23:56:21,263 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:21,263 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:21,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,349 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:21,349 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:21,356 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:21,358 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:21,358 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:21,358 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:21,358 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:56:21,361 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:56:21,361 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 23:56:21,383 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:21,415 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:21,417 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:21,417 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:56:21,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:21,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:21,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:56:21,419 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:56:21,419 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:56:21,424 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:56:21,429 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 23:56:21,429 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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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) [2020-11-29 23:56:21,436 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:56:21,436 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:56:21,436 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:56:21,436 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:21,459 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:56:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:56:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:56:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:21,551 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 23:56:21,551 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-11-29 23:56:21,600 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 25 states and 35 transitions. Complement of second has 5 states. [2020-11-29 23:56:21,600 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 23:56:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:56:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2020-11-29 23:56:21,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-29 23:56:21,601 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:21,602 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 23:56:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:56:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:56:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:21,690 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 23:56:21,690 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 23:56:21,691 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-11-29 23:56:21,753 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 36 states and 51 transitions. Complement of second has 9 states. [2020-11-29 23:56:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 23:56:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:56:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2020-11-29 23:56:21,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-29 23:56:21,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:21,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 9 letters. Loop has 6 letters. [2020-11-29 23:56:21,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:21,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 3 letters. Loop has 12 letters. [2020-11-29 23:56:21,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:21,758 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 51 transitions. [2020-11-29 23:56:21,760 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2020-11-29 23:56:21,761 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 33 states and 47 transitions. [2020-11-29 23:56:21,761 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2020-11-29 23:56:21,761 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2020-11-29 23:56:21,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 47 transitions. [2020-11-29 23:56:21,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:56:21,762 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 47 transitions. [2020-11-29 23:56:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 47 transitions. [2020-11-29 23:56:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-29 23:56:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 23:56:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2020-11-29 23:56:21,765 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-29 23:56:21,765 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-29 23:56:21,765 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 23:56:21,766 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 42 transitions. [2020-11-29 23:56:21,767 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2020-11-29 23:56:21,767 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:21,767 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:21,767 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 23:56:21,767 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 23:56:21,767 INFO L794 eck$LassoCheckResult]: Stem: 316#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; 317#L18-2 assume !!(0 != main_~i~0); 314#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 315#L12 assume main_~i~0 < 0; 322#L13 [2020-11-29 23:56:21,768 INFO L796 eck$LassoCheckResult]: Loop: 322#L13 assume !(main_~i~0 <= -2147483648);main_~i~0 := -1 * main_~i~0; 323#L18-2 assume !!(0 != main_~i~0); 339#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 321#L12 assume main_~i~0 < 0; 322#L13 [2020-11-29 23:56:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:21,768 INFO L82 PathProgramCache]: Analyzing trace with hash 963341, now seen corresponding path program 1 times [2020-11-29 23:56:21,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:21,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597370312] [2020-11-29 23:56:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:21,773 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:21,777 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:21,778 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:21,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1559161, now seen corresponding path program 1 times [2020-11-29 23:56:21,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:21,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277756674] [2020-11-29 23:56:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:21,785 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:21,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:21,790 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash 608049029, now seen corresponding path program 1 times [2020-11-29 23:56:21,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:21,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816190900] [2020-11-29 23:56:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816190900] [2020-11-29 23:56:21,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:21,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:56:21,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473986486] [2020-11-29 23:56:21,866 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:21,866 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:21,866 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:21,866 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:21,866 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:56:21,867 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:21,867 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:21,867 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:21,867 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration5_Loop [2020-11-29 23:56:21,867 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:21,867 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:21,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:21,958 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:21,958 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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 23:56:21,969 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:21,969 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:56:21,973 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:56:21,974 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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) [2020-11-29 23:56:22,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:22,024 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,028 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:56:22,028 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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) [2020-11-29 23:56:22,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:22,071 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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) [2020-11-29 23:56:22,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:56:22,121 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,197 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:56:22,199 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:22,199 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:22,199 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:22,199 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:22,199 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:56:22,199 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,199 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:22,199 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:22,199 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration5_Loop [2020-11-29 23:56:22,199 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:22,200 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:22,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,293 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:22,293 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,296 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:22,297 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:22,297 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:22,297 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:22,297 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:56:22,300 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:56:22,300 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 23:56:22,309 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:22,353 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:22,355 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:22,355 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:22,355 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:22,355 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:56:22,360 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:56:22,360 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,365 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:22,400 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:22,402 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:22,402 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:56:22,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:22,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:22,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,405 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:56:22,405 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:56:22,408 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:56:22,412 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 23:56:22,412 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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:22,419 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:56:22,419 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:56:22,419 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:56:22,419 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,440 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:56:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:56:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:22,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:56:22,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:22,521 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 23:56:22,521 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 42 transitions. cyclomatic complexity: 19 Second operand 4 states. [2020-11-29 23:56:22,684 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 42 transitions. cyclomatic complexity: 19. Second operand 4 states. Result 94 states and 136 transitions. Complement of second has 11 states. [2020-11-29 23:56:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-29 23:56:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:56:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2020-11-29 23:56:22,685 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-29 23:56:22,686 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:22,686 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-29 23:56:22,686 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:22,686 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 4 letters. Loop has 8 letters. [2020-11-29 23:56:22,686 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:22,686 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 94 states and 136 transitions. [2020-11-29 23:56:22,691 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 19 [2020-11-29 23:56:22,693 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 94 states to 80 states and 118 transitions. [2020-11-29 23:56:22,693 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 32 [2020-11-29 23:56:22,694 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2020-11-29 23:56:22,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 118 transitions. [2020-11-29 23:56:22,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:56:22,694 INFO L691 BuchiCegarLoop]: Abstraction has 80 states and 118 transitions. [2020-11-29 23:56:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states and 118 transitions. [2020-11-29 23:56:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-11-29 23:56:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 23:56:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 103 transitions. [2020-11-29 23:56:22,702 INFO L714 BuchiCegarLoop]: Abstraction has 68 states and 103 transitions. [2020-11-29 23:56:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:56:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:56:22,703 INFO L87 Difference]: Start difference. First operand 68 states and 103 transitions. Second operand 4 states. [2020-11-29 23:56:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:22,753 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-11-29 23:56:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:56:22,756 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 60 states and 81 transitions. [2020-11-29 23:56:22,758 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2020-11-29 23:56:22,759 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 60 states to 56 states and 77 transitions. [2020-11-29 23:56:22,759 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2020-11-29 23:56:22,759 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2020-11-29 23:56:22,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 77 transitions. [2020-11-29 23:56:22,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:56:22,760 INFO L691 BuchiCegarLoop]: Abstraction has 56 states and 77 transitions. [2020-11-29 23:56:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 77 transitions. [2020-11-29 23:56:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 27. [2020-11-29 23:56:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 23:56:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2020-11-29 23:56:22,763 INFO L714 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-11-29 23:56:22,763 INFO L594 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-11-29 23:56:22,764 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 23:56:22,764 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 39 transitions. [2020-11-29 23:56:22,764 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-11-29 23:56:22,764 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:22,765 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:22,765 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 23:56:22,765 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:56:22,765 INFO L794 eck$LassoCheckResult]: Stem: 625#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; 626#L18-2 assume !!(0 != main_~i~0); 642#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 643#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 632#L18-2 [2020-11-29 23:56:22,765 INFO L796 eck$LassoCheckResult]: Loop: 632#L18-2 assume !!(0 != main_~i~0); 647#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 630#L12 assume !(main_~i~0 < 0); 632#L18-2 [2020-11-29 23:56:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash 963757, now seen corresponding path program 1 times [2020-11-29 23:56:22,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346107497] [2020-11-29 23:56:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:22,771 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:22,782 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:22,784 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash 39827, now seen corresponding path program 2 times [2020-11-29 23:56:22,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:22,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409672528] [2020-11-29 23:56:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:22,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:22,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:22,793 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:22,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1353476249, now seen corresponding path program 2 times [2020-11-29 23:56:22,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:22,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284471749] [2020-11-29 23:56:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:22,800 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:22,804 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:22,805 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:22,837 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:22,837 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:22,837 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:22,837 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:22,837 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:56:22,837 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,837 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:22,837 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:22,837 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration6_Loop [2020-11-29 23:56:22,837 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:22,837 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:22,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,906 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:22,906 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:22,918 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:56:22,918 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,942 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:56:22,943 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:56:22,968 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:56:22,969 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:56:22,969 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:56:22,969 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:56:22,969 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:56:22,970 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:56:22,970 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:22,970 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:56:22,970 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:56:22,970 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration6_Loop [2020-11-29 23:56:22,970 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:56:22,970 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:56:22,971 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:56:22,984 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 23:56:23,052 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:56:23,052 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:56:23,062 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:56:23,064 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:56:23,064 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:56:23,064 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:56:23,064 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:56:23,064 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:23,066 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:56:23,066 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:56:23,068 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:56:23,071 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 23:56:23,071 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_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:56:23,073 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:56:23,073 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:56:23,073 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:56:23,073 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-11-29 23:56:23,093 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:56:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:56:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:23,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:56:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:23,160 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 23:56:23,160 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states and 39 transitions. cyclomatic complexity: 16 Second operand 4 states. [2020-11-29 23:56:23,203 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states and 39 transitions. cyclomatic complexity: 16. Second operand 4 states. Result 61 states and 81 transitions. Complement of second has 5 states. [2020-11-29 23:56:23,205 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 23:56:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:56:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 14 transitions. [2020-11-29 23:56:23,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 23:56:23,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:23,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-29 23:56:23,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:23,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 4 letters. Loop has 6 letters. [2020-11-29 23:56:23,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:56:23,207 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 81 transitions. [2020-11-29 23:56:23,209 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 21 [2020-11-29 23:56:23,209 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 55 states and 74 transitions. [2020-11-29 23:56:23,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2020-11-29 23:56:23,210 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 32 [2020-11-29 23:56:23,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 74 transitions. [2020-11-29 23:56:23,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:56:23,210 INFO L691 BuchiCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-11-29 23:56:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 74 transitions. [2020-11-29 23:56:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-11-29 23:56:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 23:56:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-11-29 23:56:23,215 INFO L714 BuchiCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-11-29 23:56:23,215 INFO L594 BuchiCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-11-29 23:56:23,215 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 23:56:23,215 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 49 states and 68 transitions. [2020-11-29 23:56:23,216 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 21 [2020-11-29 23:56:23,216 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:56:23,216 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:56:23,217 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 23:56:23,217 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2020-11-29 23:56:23,217 INFO L794 eck$LassoCheckResult]: Stem: 755#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; 756#L18-2 assume !!(0 != main_~i~0); 781#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 779#L18 assume !(main_~i~0 > 0); 765#L18-2 [2020-11-29 23:56:23,217 INFO L796 eck$LassoCheckResult]: Loop: 765#L18-2 assume !!(0 != main_~i~0); 751#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 752#L12 assume !(main_~i~0 < 0); 797#L18-2 assume !!(0 != main_~i~0); 794#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 764#L18 assume !(main_~i~0 > 0); 765#L18-2 [2020-11-29 23:56:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash 963759, now seen corresponding path program 1 times [2020-11-29 23:56:23,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:23,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122358920] [2020-11-29 23:56:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:23,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:23,240 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:23,241 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1186496604, now seen corresponding path program 1 times [2020-11-29 23:56:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:23,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344079753] [2020-11-29 23:56:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:23,246 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:23,258 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:23,260 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1517058698, now seen corresponding path program 1 times [2020-11-29 23:56:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:23,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239584388] [2020-11-29 23:56:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:23,282 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:56:23,286 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:56:23,287 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:56:23,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:56:23 BoogieIcfgContainer [2020-11-29 23:56:23,391 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:56:23,391 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:56:23,391 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:56:23,391 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:56:23,392 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:56:19" (3/4) ... [2020-11-29 23:56:23,394 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 23:56:23,427 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7b8579b0-af48-48db-bb9e-15c9d71fccfa/bin/uautomizer/witness.graphml [2020-11-29 23:56:23,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:56:23,433 INFO L168 Benchmark]: Toolchain (without parser) took 4664.30 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 83.2 MB in the beginning and 48.1 MB in the end (delta: 35.1 MB). Peak memory consumption was 57.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:56:23,434 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 77.6 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 41.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:56:23,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.21 ms. Allocated memory is still 111.1 MB. Free memory was 83.2 MB in the beginning and 89.9 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:56:23,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.33 ms. Allocated memory is still 111.1 MB. Free memory was 89.9 MB in the beginning and 88.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:56:23,435 INFO L168 Benchmark]: Boogie Preprocessor took 19.49 ms. Allocated memory is still 111.1 MB. Free memory was 88.8 MB in the beginning and 87.8 MB in the end (delta: 976.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:56:23,435 INFO L168 Benchmark]: RCFGBuilder took 232.22 ms. Allocated memory is still 111.1 MB. Free memory was 87.8 MB in the beginning and 79.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:56:23,436 INFO L168 Benchmark]: BuchiAutomizer took 4086.27 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 79.1 MB in the beginning and 49.1 MB in the end (delta: 30.0 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:56:23,436 INFO L168 Benchmark]: Witness Printer took 36.04 ms. Allocated memory is still 134.2 MB. Free memory was 49.1 MB in the beginning and 48.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:56:23,438 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 77.6 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 41.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.21 ms. Allocated memory is still 111.1 MB. Free memory was 83.2 MB in the beginning and 89.9 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.33 ms. Allocated memory is still 111.1 MB. Free memory was 89.9 MB in the beginning and 88.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.49 ms. Allocated memory is still 111.1 MB. Free memory was 88.8 MB in the beginning and 87.8 MB in the end (delta: 976.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 232.22 ms. Allocated memory is still 111.1 MB. Free memory was 87.8 MB in the beginning and 79.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4086.27 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 79.1 MB in the beginning and 49.1 MB in the end (delta: 30.0 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.1 GB. * Witness Printer took 36.04 ms. Allocated memory is still 134.2 MB. Free memory was 49.1 MB in the beginning and 48.1 MB in the end (delta: 1.0 MB). There was no memory consumed. 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 7 terminating modules (3 trivial, 4 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 4 locations. One deterministic module has affine ranking function i and consists of 5 locations. One deterministic module has affine ranking function i and consists of 6 locations. One deterministic module has affine ranking function -1 * i and consists of 3 locations. 3 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 49 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.0s and 7 iterations. TraceHistogramMax:2. Analysis of lassos took 2.7s. Construction of modules took 0.3s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 56 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 49 states and ocurred in iteration 6. Nontrivial modules had stage [3, 1, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 59 SDtfs, 59 SDslu, 3 SDs, 0 SdLazy, 144 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT3 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax181 hnf92 lsp52 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq152 hnf94 smp93 dnf100 smp100 tf111 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 27ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 9]: 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@936e8c0=0, \result=0, i=-1} - 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 != 0 [L10] COND FALSE !(i < 0) [L17] i = i-2 [L18] COND FALSE !(i > 0) Loop: [L9] COND TRUE i != 0 [L10] COND TRUE i < 0 [L11] i = i+2 [L12] COND FALSE !(i < 0) [L9] COND TRUE i != 0 [L10] COND FALSE !(i < 0) [L17] i = i-2 [L18] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...