./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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/AlternKonv.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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 [2020-11-28 03:01:11,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:01:11,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:01:11,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:01:11,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:01:11,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:01:11,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:01:11,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:01:11,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:01:11,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:01:11,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:01:11,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:01:11,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:01:11,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:01:11,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:01:11,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:01:11,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:01:11,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:01:11,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:01:11,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:01:11,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:01:11,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:01:11,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:01:11,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:01:11,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:01:11,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:01:11,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:01:11,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:01:11,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:01:11,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:01:11,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:01:11,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:01:11,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:01:11,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:01:11,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:01:11,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:01:11,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:01:12,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:01:12,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:01:12,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:01:12,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:01:12,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-28 03:01:12,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:01:12,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:01:12,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:01:12,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:01:12,054 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:01:12,054 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:01:12,054 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:01:12,055 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:01:12,055 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:01:12,055 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:01:12,057 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:01:12,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:01:12,057 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:01:12,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:01:12,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:01:12,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:01:12,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:01:12,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:01:12,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:01:12,059 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:01:12,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:01:12,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:01:12,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:01:12,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:01:12,061 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:01:12,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:01:12,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:01:12,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:01:12,062 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:01:12,067 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:01:12,067 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 475cf88887990488194ca7f61a6d05f74a450e7b [2020-11-28 03:01:12,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:01:12,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:01:12,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:01:12,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:01:12,444 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:01:12,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2020-11-28 03:01:12,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/data/4128167b8/fc9d3d38c22a4e31978302899e83e06e/FLAGe2b51949a [2020-11-28 03:01:13,069 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:01:13,070 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2020-11-28 03:01:13,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/data/4128167b8/fc9d3d38c22a4e31978302899e83e06e/FLAGe2b51949a [2020-11-28 03:01:13,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/data/4128167b8/fc9d3d38c22a4e31978302899e83e06e [2020-11-28 03:01:13,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:01:13,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:01:13,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:01:13,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:01:13,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:01:13,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ded7b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13, skipping insertion in model container [2020-11-28 03:01:13,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:01:13,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:01:13,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:01:13,651 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:01:13,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:01:13,726 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:01:13,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13 WrapperNode [2020-11-28 03:01:13,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:01:13,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:01:13,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:01:13,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:01:13,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:01:13,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:01:13,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:01:13,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:01:13,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... [2020-11-28 03:01:13,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:01:13,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:01:13,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:01:13,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:01:13,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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 [2020-11-28 03:01:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:01:13,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:01:14,147 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:01:14,148 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-28 03:01:14,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:01:14 BoogieIcfgContainer [2020-11-28 03:01:14,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:01:14,152 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:01:14,152 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:01:14,157 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:01:14,158 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:01:14,158 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:01:13" (1/3) ... [2020-11-28 03:01:14,160 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@307b3379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:01:14, skipping insertion in model container [2020-11-28 03:01:14,160 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:01:14,161 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:13" (2/3) ... [2020-11-28 03:01:14,161 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@307b3379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:01:14, skipping insertion in model container [2020-11-28 03:01:14,161 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:01:14,162 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:01:14" (3/3) ... [2020-11-28 03:01:14,163 INFO L373 chiAutomizerObserver]: Analyzing ICFG AlternKonv.c [2020-11-28 03:01:14,253 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:01:14,254 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:01:14,254 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:01:14,254 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:01:14,254 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:01:14,254 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:01:14,254 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:01:14,255 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:01:14,269 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states. [2020-11-28 03:01:14,290 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:01:14,290 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:14,290 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:14,299 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 03:01:14,299 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:01:14,299 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:01:14,299 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states. [2020-11-28 03:01:14,301 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:01:14,301 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:14,301 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:14,302 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 03:01:14,302 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:01:14,311 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 [2020-11-28 03:01:14,311 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 [2020-11-28 03:01:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-28 03:01:14,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:14,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395472861] [2020-11-28 03:01:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:14,433 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:14,438 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:14,457 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 39827, now seen corresponding path program 1 times [2020-11-28 03:01:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:14,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654732106] [2020-11-28 03:01:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:14,475 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:14,484 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:14,487 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash 963348, now seen corresponding path program 1 times [2020-11-28 03:01:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:14,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317823497] [2020-11-28 03:01:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:14,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:14,533 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:14,535 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:14,712 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2020-11-28 03:01:14,762 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:14,763 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:14,764 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:14,764 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:14,764 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:01:14,764 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:14,765 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:14,765 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:14,765 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2020-11-28 03:01:14,765 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:14,766 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:14,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:14,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:14,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:14,908 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:14,909 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:14,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:14,921 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:01:14,931 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:01:14,932 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:14,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:14,999 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 [2020-11-28 03:01:15,007 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:01:15,007 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:01:15,044 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:15,044 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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 [2020-11-28 03:01:15,083 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:01:15,083 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:01:15,116 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:01:15,117 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:15,118 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:15,118 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:15,118 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:15,118 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:01:15,118 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:15,118 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:15,118 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:15,119 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2020-11-28 03:01:15,119 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:15,119 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:15,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:15,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:15,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:15,269 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:15,274 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:15,308 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 Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:15,310 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:15,310 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:15,311 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:15,311 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:15,317 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 03:01:15,318 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-28 03:01:15,334 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:01:15,378 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 [2020-11-28 03:01:15,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:15,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:15,380 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:15,381 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:15,399 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 03:01:15,399 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-28 03:01:15,410 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:15,452 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 [2020-11-28 03:01:15,454 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:15,455 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:01:15,455 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:15,455 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:15,456 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:15,458 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:01:15,458 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:01:15,462 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:01:15,465 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:01:15,465 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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 [2020-11-28 03:01:15,470 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:01:15,471 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:01:15,471 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:01:15,472 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-11-28 03:01:15,503 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:01:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:15,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:01:15,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:15,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:01:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:15,669 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 [2020-11-28 03:01:15,671 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states. Second operand 4 states. [2020-11-28 03:01:15,760 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. [2020-11-28 03:01:15,761 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 [2020-11-28 03:01:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:01:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2020-11-28 03:01:15,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 3 letters. [2020-11-28 03:01:15,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:15,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-28 03:01:15,767 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:15,767 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 6 letters. [2020-11-28 03:01:15,767 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:15,769 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 45 transitions. [2020-11-28 03:01:15,775 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:01:15,780 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 14 states and 20 transitions. [2020-11-28 03:01:15,781 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-28 03:01:15,781 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-28 03:01:15,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2020-11-28 03:01:15,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:01:15,782 INFO L691 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-28 03:01:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2020-11-28 03:01:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2020-11-28 03:01:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:01:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2020-11-28 03:01:15,811 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2020-11-28 03:01:15,811 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2020-11-28 03:01:15,811 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:01:15,812 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2020-11-28 03:01:15,812 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:01:15,813 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:15,813 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:15,813 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:01:15,813 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:01:15,814 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 [2020-11-28 03:01:15,814 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 [2020-11-28 03:01:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:15,815 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 1 times [2020-11-28 03:01:15,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:15,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826929449] [2020-11-28 03:01:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:15,821 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:15,844 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:15,846 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:15,847 INFO L82 PathProgramCache]: Analyzing trace with hash 57996, now seen corresponding path program 1 times [2020-11-28 03:01:15,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:15,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245994804] [2020-11-28 03:01:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:15,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245994804] [2020-11-28 03:01:15,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:01:15,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 03:01:15,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89305543] [2020-11-28 03:01:15,913 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:01:15,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:01:15,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:01:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:01:15,920 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. cyclomatic complexity: 8 Second operand 3 states. [2020-11-28 03:01:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:01:15,956 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2020-11-28 03:01:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:01:15,957 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 20 transitions. [2020-11-28 03:01:15,958 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-28 03:01:15,959 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 14 states and 20 transitions. [2020-11-28 03:01:15,959 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-28 03:01:15,960 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-28 03:01:15,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2020-11-28 03:01:15,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:01:15,960 INFO L691 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-28 03:01:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2020-11-28 03:01:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-28 03:01:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 03:01:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2020-11-28 03:01:15,963 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-28 03:01:15,963 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-28 03:01:15,963 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:01:15,963 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2020-11-28 03:01:15,964 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-28 03:01:15,964 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:15,964 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:15,964 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:01:15,964 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:01:15,965 INFO L794 eck$LassoCheckResult]: Stem: 115#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 116#L18-2 assume !!(0 != main_~i~0); 111#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 112#L18 [2020-11-28 03:01:15,965 INFO L796 eck$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 [2020-11-28 03:01:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 2 times [2020-11-28 03:01:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:15,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840213987] [2020-11-28 03:01:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:15,973 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:15,977 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:15,978 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash 59918, now seen corresponding path program 1 times [2020-11-28 03:01:15,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:15,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936350334] [2020-11-28 03:01:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:16,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936350334] [2020-11-28 03:01:16,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:01:16,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:01:16,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146848430] [2020-11-28 03:01:16,015 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:01:16,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:01:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:01:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:01:16,016 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-11-28 03:01:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:01:16,056 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2020-11-28 03:01:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:01:16,066 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 22 transitions. [2020-11-28 03:01:16,067 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-28 03:01:16,068 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 22 transitions. [2020-11-28 03:01:16,068 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-28 03:01:16,068 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-11-28 03:01:16,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2020-11-28 03:01:16,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:01:16,069 INFO L691 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2020-11-28 03:01:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2020-11-28 03:01:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-11-28 03:01:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 03:01:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2020-11-28 03:01:16,071 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-28 03:01:16,071 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-28 03:01:16,071 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:01:16,071 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2020-11-28 03:01:16,072 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-28 03:01:16,072 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:16,072 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:16,073 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:01:16,073 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2020-11-28 03:01:16,073 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 [2020-11-28 03:01:16,073 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 [2020-11-28 03:01:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 3 times [2020-11-28 03:01:16,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:16,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181911357] [2020-11-28 03:01:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:16,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:16,083 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:16,084 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:16,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1727393992, now seen corresponding path program 1 times [2020-11-28 03:01:16,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:16,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286389046] [2020-11-28 03:01:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:16,108 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:16,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:16,114 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash 684415735, now seen corresponding path program 1 times [2020-11-28 03:01:16,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:16,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311130666] [2020-11-28 03:01:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:16,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:16,144 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:16,150 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:16,216 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:16,216 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:16,216 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:16,216 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:16,217 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:01:16,217 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:16,217 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:16,217 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:16,217 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration4_Loop [2020-11-28 03:01:16,217 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:16,217 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:16,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:16,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:16,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:16,321 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:16,321 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:16,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:16,327 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 [2020-11-28 03:01:16,334 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:01:16,335 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:16,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:16,378 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:01:16,386 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:01:16,386 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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 [2020-11-28 03:01:16,415 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:16,415 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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 [2020-11-28 03:01:16,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:01:16,449 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:01:16,467 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:01:16,491 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:16,491 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:16,491 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:16,491 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:16,492 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:01:16,492 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:16,492 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:16,492 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:16,492 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration4_Loop [2020-11-28 03:01:16,492 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:16,492 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:16,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:16,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:16,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:16,581 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:16,581 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:16,592 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 [2020-11-28 03:01:16,597 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:16,597 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:16,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:16,597 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:16,606 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 03:01:16,607 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:16,618 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:16,664 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 [2020-11-28 03:01:16,666 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:16,666 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:01:16,667 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:16,667 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:16,667 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:16,670 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:01:16,671 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:16,674 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:01:16,678 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:01:16,678 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:16,699 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:01:16,699 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:01:16,699 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:01:16,699 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 [2020-11-28 03:01:16,725 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:01:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:01:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:16,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:01:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:16,835 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 [2020-11-28 03:01:16,835 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-11-28 03:01:16,869 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. [2020-11-28 03:01:16,870 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 [2020-11-28 03:01:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:01:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2020-11-28 03:01:16,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-28 03:01:16,871 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:16,871 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:01:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:01:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:01:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:16,979 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 [2020-11-28 03:01:16,979 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-11-28 03:01:17,053 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. [2020-11-28 03:01:17,056 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 [2020-11-28 03:01:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:01:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2020-11-28 03:01:17,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-28 03:01:17,057 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:17,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 9 letters. Loop has 6 letters. [2020-11-28 03:01:17,057 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:17,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 3 letters. Loop has 12 letters. [2020-11-28 03:01:17,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:17,058 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 51 transitions. [2020-11-28 03:01:17,060 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2020-11-28 03:01:17,061 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 33 states and 47 transitions. [2020-11-28 03:01:17,061 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2020-11-28 03:01:17,062 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2020-11-28 03:01:17,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 47 transitions. [2020-11-28 03:01:17,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:01:17,062 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 47 transitions. [2020-11-28 03:01:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 47 transitions. [2020-11-28 03:01:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-28 03:01:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:01:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2020-11-28 03:01:17,070 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-28 03:01:17,070 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-28 03:01:17,070 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-28 03:01:17,071 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 42 transitions. [2020-11-28 03:01:17,075 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2020-11-28 03:01:17,075 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:17,076 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:17,076 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-28 03:01:17,076 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-28 03:01:17,077 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 [2020-11-28 03:01:17,077 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 [2020-11-28 03:01:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash 963341, now seen corresponding path program 1 times [2020-11-28 03:01:17,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:17,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216766874] [2020-11-28 03:01:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:17,096 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:17,102 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:17,107 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:17,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1559161, now seen corresponding path program 1 times [2020-11-28 03:01:17,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:17,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093226559] [2020-11-28 03:01:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:17,117 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:17,121 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:17,122 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:17,123 INFO L82 PathProgramCache]: Analyzing trace with hash 608049029, now seen corresponding path program 1 times [2020-11-28 03:01:17,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:17,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386397621] [2020-11-28 03:01:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:17,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386397621] [2020-11-28 03:01:17,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:01:17,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:01:17,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138070230] [2020-11-28 03:01:17,231 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:17,231 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:17,231 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:17,231 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:17,231 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:01:17,232 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,232 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:17,232 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:17,232 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration5_Loop [2020-11-28 03:01:17,232 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:17,232 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:17,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:17,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:17,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:17,313 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:17,313 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:17,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:17,339 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,345 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:01:17,345 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,373 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:17,374 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:01:17,378 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:01:17,378 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:17,410 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,446 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:01:17,446 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:01:17,526 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:01:17,527 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:17,527 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:17,528 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:17,528 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:17,528 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:01:17,528 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,528 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:17,528 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:17,528 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration5_Loop [2020-11-28 03:01:17,528 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:17,528 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:17,530 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:17,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:17,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:17,631 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:17,631 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:01:17,648 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 [2020-11-28 03:01:17,650 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:17,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:17,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:17,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:17,653 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 03:01:17,653 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,660 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:17,707 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 [2020-11-28 03:01:17,709 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:17,710 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:17,710 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:17,710 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:17,715 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 03:01:17,716 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 [2020-11-28 03:01:17,722 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:17,768 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 [2020-11-28 03:01:17,770 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:17,770 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:01:17,770 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:17,771 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:17,771 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:17,773 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:01:17,773 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:17,776 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:01:17,781 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:01:17,781 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:17,786 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:01:17,786 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:01:17,786 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:01:17,787 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 [2020-11-28 03:01:17,829 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:01:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:01:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:17,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:01:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:17,904 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 [2020-11-28 03:01:17,905 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 42 transitions. cyclomatic complexity: 19 Second operand 4 states. [2020-11-28 03:01:18,046 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. [2020-11-28 03:01:18,047 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 [2020-11-28 03:01:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:01:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2020-11-28 03:01:18,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-28 03:01:18,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:18,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-28 03:01:18,049 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:18,049 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 4 letters. Loop has 8 letters. [2020-11-28 03:01:18,049 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:18,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 94 states and 136 transitions. [2020-11-28 03:01:18,054 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 19 [2020-11-28 03:01:18,056 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 94 states to 80 states and 118 transitions. [2020-11-28 03:01:18,056 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 32 [2020-11-28 03:01:18,057 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2020-11-28 03:01:18,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 118 transitions. [2020-11-28 03:01:18,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:01:18,057 INFO L691 BuchiCegarLoop]: Abstraction has 80 states and 118 transitions. [2020-11-28 03:01:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states and 118 transitions. [2020-11-28 03:01:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-11-28 03:01:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-28 03:01:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 103 transitions. [2020-11-28 03:01:18,074 INFO L714 BuchiCegarLoop]: Abstraction has 68 states and 103 transitions. [2020-11-28 03:01:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:01:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:01:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:01:18,076 INFO L87 Difference]: Start difference. First operand 68 states and 103 transitions. Second operand 4 states. [2020-11-28 03:01:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:01:18,188 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-11-28 03:01:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:01:18,189 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 60 states and 81 transitions. [2020-11-28 03:01:18,191 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2020-11-28 03:01:18,193 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 60 states to 56 states and 77 transitions. [2020-11-28 03:01:18,193 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2020-11-28 03:01:18,193 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2020-11-28 03:01:18,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 77 transitions. [2020-11-28 03:01:18,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:01:18,197 INFO L691 BuchiCegarLoop]: Abstraction has 56 states and 77 transitions. [2020-11-28 03:01:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 77 transitions. [2020-11-28 03:01:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 27. [2020-11-28 03:01:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:01:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2020-11-28 03:01:18,205 INFO L714 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-11-28 03:01:18,205 INFO L594 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-11-28 03:01:18,206 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-28 03:01:18,206 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 39 transitions. [2020-11-28 03:01:18,207 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-11-28 03:01:18,208 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:18,208 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:18,209 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-28 03:01:18,210 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:01:18,210 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 [2020-11-28 03:01:18,210 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 [2020-11-28 03:01:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:18,211 INFO L82 PathProgramCache]: Analyzing trace with hash 963757, now seen corresponding path program 1 times [2020-11-28 03:01:18,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:18,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799923179] [2020-11-28 03:01:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,233 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,238 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash 39827, now seen corresponding path program 2 times [2020-11-28 03:01:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:18,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519250048] [2020-11-28 03:01:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,250 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,260 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,261 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1353476249, now seen corresponding path program 2 times [2020-11-28 03:01:18,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:18,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118997804] [2020-11-28 03:01:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,273 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,284 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,286 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:18,326 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:18,326 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:18,326 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:18,326 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:18,327 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:01:18,327 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:18,327 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:18,327 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:18,327 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration6_Loop [2020-11-28 03:01:18,327 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:18,327 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:18,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:18,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:18,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:18,411 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:18,411 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:18,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:01:18,416 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:18,468 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:01:18,468 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:18,516 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:01:18,518 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:01:18,518 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:01:18,518 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:01:18,519 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:01:18,519 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:01:18,519 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:18,519 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:01:18,519 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:01:18,519 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration6_Loop [2020-11-28 03:01:18,519 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:01:18,519 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:01:18,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:18,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:18,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:01:18,605 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:01:18,605 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:18,614 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 [2020-11-28 03:01:18,616 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:01:18,616 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:01:18,616 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:01:18,617 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:01:18,617 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:01:18,619 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:01:18,619 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:18,623 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:01:18,628 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:01:18,628 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_ac04471b-6b9e-49a3-a674-ea323c8c9e26/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) [2020-11-28 03:01:18,632 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:01:18,632 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:01:18,632 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:01:18,632 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:01:18,675 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:01:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:18,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:01:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:01:18,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:01:18,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:01:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:01:18,751 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 [2020-11-28 03:01:18,751 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states and 39 transitions. cyclomatic complexity: 16 Second operand 4 states. [2020-11-28 03:01:18,781 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. [2020-11-28 03:01:18,783 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 [2020-11-28 03:01:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:01:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 14 transitions. [2020-11-28 03:01:18,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-28 03:01:18,784 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:18,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-28 03:01:18,784 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:18,785 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 4 letters. Loop has 6 letters. [2020-11-28 03:01:18,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:01:18,785 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 81 transitions. [2020-11-28 03:01:18,787 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 21 [2020-11-28 03:01:18,788 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 55 states and 74 transitions. [2020-11-28 03:01:18,788 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2020-11-28 03:01:18,788 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 32 [2020-11-28 03:01:18,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 74 transitions. [2020-11-28 03:01:18,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:01:18,789 INFO L691 BuchiCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-11-28 03:01:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 74 transitions. [2020-11-28 03:01:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-11-28 03:01:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 03:01:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-11-28 03:01:18,800 INFO L714 BuchiCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-11-28 03:01:18,800 INFO L594 BuchiCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-11-28 03:01:18,801 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-28 03:01:18,801 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 49 states and 68 transitions. [2020-11-28 03:01:18,802 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 21 [2020-11-28 03:01:18,802 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:01:18,802 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:01:18,803 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-28 03:01:18,803 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2020-11-28 03:01:18,803 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 [2020-11-28 03:01:18,803 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 [2020-11-28 03:01:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash 963759, now seen corresponding path program 1 times [2020-11-28 03:01:18,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:18,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251508552] [2020-11-28 03:01:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,809 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,813 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,814 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:18,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1186496604, now seen corresponding path program 1 times [2020-11-28 03:01:18,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:18,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407087517] [2020-11-28 03:01:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,820 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,825 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:01:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1517058698, now seen corresponding path program 1 times [2020-11-28 03:01:18,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:01:18,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247513603] [2020-11-28 03:01:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:01:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,833 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:01:18,838 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:01:18,839 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:01:18,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:01:18 BoogieIcfgContainer [2020-11-28 03:01:18,940 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:01:18,941 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:01:18,941 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:01:18,941 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:01:18,942 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:01:14" (3/4) ... [2020-11-28 03:01:18,945 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-28 03:01:19,002 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ac04471b-6b9e-49a3-a674-ea323c8c9e26/bin/uautomizer/witness.graphml [2020-11-28 03:01:19,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:01:19,004 INFO L168 Benchmark]: Toolchain (without parser) took 5585.61 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 40.7 MB in the beginning and 35.4 MB in the end (delta: 5.3 MB). Peak memory consumption was 41.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:01:19,005 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory was 57.0 MB in the beginning and 56.9 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:01:19,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.06 ms. Allocated memory is still 75.5 MB. Free memory was 57.6 MB in the beginning and 56.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:01:19,006 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.80 ms. Allocated memory is still 75.5 MB. Free memory was 56.0 MB in the beginning and 54.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:01:19,007 INFO L168 Benchmark]: Boogie Preprocessor took 35.33 ms. Allocated memory is still 75.5 MB. Free memory was 54.7 MB in the beginning and 53.9 MB in the end (delta: 849.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:01:19,007 INFO L168 Benchmark]: RCFGBuilder took 335.32 ms. Allocated memory is still 75.5 MB. Free memory was 53.9 MB in the beginning and 45.6 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:01:19,010 INFO L168 Benchmark]: BuchiAutomizer took 4788.40 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 45.4 MB in the beginning and 36.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:01:19,011 INFO L168 Benchmark]: Witness Printer took 62.26 ms. Allocated memory is still 111.1 MB. Free memory was 36.3 MB in the beginning and 35.4 MB in the end (delta: 974.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:01:19,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory was 57.0 MB in the beginning and 56.9 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.06 ms. Allocated memory is still 75.5 MB. Free memory was 57.6 MB in the beginning and 56.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.80 ms. Allocated memory is still 75.5 MB. Free memory was 56.0 MB in the beginning and 54.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.33 ms. Allocated memory is still 75.5 MB. Free memory was 54.7 MB in the beginning and 53.9 MB in the end (delta: 849.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 335.32 ms. Allocated memory is still 75.5 MB. Free memory was 53.9 MB in the beginning and 45.6 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4788.40 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 45.4 MB in the beginning and 36.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. * Witness Printer took 62.26 ms. Allocated memory is still 111.1 MB. Free memory was 36.3 MB in the beginning and 35.4 MB in the end (delta: 974.9 kB). 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 4.6s and 7 iterations. TraceHistogramMax:2. Analysis of lassos took 3.3s. Construction of modules took 0.3s. Büchi inclusion checks took 0.8s. 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: 59ms 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@7018d4bb=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...