./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/c.08.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_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/c.08.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/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 8d821d1d8ee2aa872e0bf75fb913cf046d5ff3f8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:58:54,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:58:54,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:58:54,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:58:54,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:58:54,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:58:54,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:58:54,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:58:54,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:58:54,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:58:54,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:58:54,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:58:54,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:58:54,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:58:54,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:58:54,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:58:54,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:58:54,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:58:54,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:58:54,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:58:54,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:58:54,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:58:54,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:58:54,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:58:54,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:58:54,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:58:54,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:58:54,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:58:54,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:58:54,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:58:54,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:58:54,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:58:54,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:58:54,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:58:54,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:58:54,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:58:54,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:58:54,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:58:54,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:58:54,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:58:54,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:58:54,441 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 23:58:54,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:58:54,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:58:54,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:58:54,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:58:54,479 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:58:54,480 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:58:54,480 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:58:54,480 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:58:54,481 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:58:54,481 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:58:54,482 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:58:54,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:58:54,483 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:58:54,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:58:54,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:58:54,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:58:54,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:58:54,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:58:54,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:58:54,485 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:58:54,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:58:54,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:58:54,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:58:54,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:58:54,487 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:58:54,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:58:54,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:58:54,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:58:54,488 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:58:54,492 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:58:54,492 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_3ccf3b40-bc5f-43ba-994c-d1651b757839/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d821d1d8ee2aa872e0bf75fb913cf046d5ff3f8 [2020-11-29 23:58:54,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:58:54,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:58:54,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:58:54,946 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:58:54,954 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:58:54,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/c.08.c [2020-11-29 23:58:55,067 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/data/a49aaa906/d9b10692e845486a8e4aef9b4496d01f/FLAG919530237 [2020-11-29 23:58:55,587 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:58:55,588 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/sv-benchmarks/c/termination-restricted-15/c.08.c [2020-11-29 23:58:55,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/data/a49aaa906/d9b10692e845486a8e4aef9b4496d01f/FLAG919530237 [2020-11-29 23:58:55,955 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/data/a49aaa906/d9b10692e845486a8e4aef9b4496d01f [2020-11-29 23:58:55,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:58:55,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:58:55,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:58:55,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:58:55,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:58:55,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:58:55" (1/1) ... [2020-11-29 23:58:55,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ac191a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:55, skipping insertion in model container [2020-11-29 23:58:55,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:58:55" (1/1) ... [2020-11-29 23:58:55,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:58:55,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:58:56,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:58:56,237 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:58:56,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:58:56,264 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:58:56,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56 WrapperNode [2020-11-29 23:58:56,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:58:56,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:58:56,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:58:56,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:58:56,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:58:56,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:58:56,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:58:56,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:58:56,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... [2020-11-29 23:58:56,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:58:56,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:58:56,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:58:56,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:58:56,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:56,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:58:56,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:58:56,563 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:58:56,564 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 23:58:56,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:56 BoogieIcfgContainer [2020-11-29 23:58:56,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:58:56,567 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:58:56,567 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:58:56,571 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:58:56,572 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:58:56,572 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:58:55" (1/3) ... [2020-11-29 23:58:56,573 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@9c1b7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:58:56, skipping insertion in model container [2020-11-29 23:58:56,573 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:58:56,574 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:56" (2/3) ... [2020-11-29 23:58:56,574 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@9c1b7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:58:56, skipping insertion in model container [2020-11-29 23:58:56,574 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:58:56,575 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:56" (3/3) ... [2020-11-29 23:58:56,576 INFO L373 chiAutomizerObserver]: Analyzing ICFG c.08.c [2020-11-29 23:58:56,638 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:58:56,638 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:58:56,639 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:58:56,639 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:58:56,639 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:58:56,639 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:58:56,639 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:58:56,640 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:58:56,654 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 23:58:56,671 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 23:58:56,671 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:58:56,672 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:58:56,677 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 23:58:56,677 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:58:56,677 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:58:56,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 23:58:56,679 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 23:58:56,679 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:58:56,679 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:58:56,680 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 23:58:56,680 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:58:56,686 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~i~0, main_~j~0;havoc main_~c~0;havoc main_~i~0;havoc main_~j~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 8#L10-2true [2020-11-29 23:58:56,687 INFO L796 eck$LassoCheckResult]: Loop: 8#L10-2true assume !!(main_~i~0 >= 0);main_~j~0 := 0; 3#L12-2true assume !(main_~j~0 <= main_~i~0 - 1); 10#L12-3true main_~i~0 := main_~i~0 - 1; 8#L10-2true [2020-11-29 23:58:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:56,694 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 23:58:56,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:56,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500351118] [2020-11-29 23:58:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:56,780 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:56,791 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:56,806 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-11-29 23:58:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:56,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951455184] [2020-11-29 23:58:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:56,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:56,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:56,860 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2020-11-29 23:58:56,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:56,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532855912] [2020-11-29 23:58:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:56,884 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:56,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:56,896 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:57,102 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:58:57,103 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:58:57,104 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:58:57,104 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:58:57,104 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:58:57,105 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,105 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:58:57,105 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:58:57,105 INFO L133 ssoRankerPreferences]: Filename of dumped script: c.08.c_Iteration1_Loop [2020-11-29 23:58:57,105 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:58:57,106 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:58:57,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:57,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:57,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:57,295 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:58:57,296 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/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 [2020-11-29 23:58:57,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:58:57,306 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:58:57,319 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:58:57,319 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_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:57,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:58:57,363 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,369 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:58:57,369 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_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:57,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:58:57,411 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_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:57,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:58:57,457 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,501 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:58:57,503 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:58:57,503 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:58:57,503 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:58:57,503 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:58:57,503 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:58:57,504 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,504 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:58:57,504 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:58:57,504 INFO L133 ssoRankerPreferences]: Filename of dumped script: c.08.c_Iteration1_Loop [2020-11-29 23:58:57,504 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:58:57,504 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:58:57,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:57,511 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:57,515 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:57,654 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:58:57,659 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:57,669 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:58:57,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:58:57,671 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:58:57,671 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:58:57,671 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,680 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:58:57,680 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 23:58:57,686 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:57,727 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:58:57,729 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:58:57,729 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:58:57,729 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:58:57,729 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:58:57,734 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:58:57,735 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,740 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:57,783 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:58:57,785 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:58:57,785 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:58:57,786 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:58:57,786 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:58:57,786 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:58:57,789 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:58:57,789 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,796 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:58:57,800 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 23:58:57,800 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:57,808 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:58:57,808 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:58:57,809 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:58:57,809 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 2*ULTIMATE.start_main_~i~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:57,845 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:58:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:58:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:57,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:58:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:57,936 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-29 23:58:57,937 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2020-11-29 23:58:57,990 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 23 states and 35 transitions. Complement of second has 7 states. [2020-11-29 23:58:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:58:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 23:58:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-11-29 23:58:57,996 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 3 letters. [2020-11-29 23:58:57,997 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:57,997 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 23:58:57,997 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:57,997 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 6 letters. [2020-11-29 23:58:57,998 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:58,002 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 35 transitions. [2020-11-29 23:58:58,005 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:58:58,009 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2020-11-29 23:58:58,010 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-29 23:58:58,010 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-11-29 23:58:58,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-11-29 23:58:58,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:58:58,011 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-29 23:58:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-11-29 23:58:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2020-11-29 23:58:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 23:58:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2020-11-29 23:58:58,034 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2020-11-29 23:58:58,035 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2020-11-29 23:58:58,035 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:58:58,035 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 9 transitions. [2020-11-29 23:58:58,036 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:58:58,036 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:58:58,036 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:58:58,037 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:58:58,037 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 23:58:58,037 INFO L794 eck$LassoCheckResult]: Stem: 73#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~i~0, main_~j~0;havoc main_~c~0;havoc main_~i~0;havoc main_~j~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 74#L10-2 assume !!(main_~i~0 >= 0);main_~j~0 := 0; 70#L12-2 [2020-11-29 23:58:58,037 INFO L796 eck$LassoCheckResult]: Loop: 70#L12-2 assume !!(main_~j~0 <= main_~i~0 - 1);main_~j~0 := 1 + main_~j~0; 70#L12-2 [2020-11-29 23:58:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 23:58:58,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:58,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158553673] [2020-11-29 23:58:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,051 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,061 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-11-29 23:58:58,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:58,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904406743] [2020-11-29 23:58:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,073 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,076 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-11-29 23:58:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:58,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182451876] [2020-11-29 23:58:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,083 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,087 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,088 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:58,117 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:58:58,117 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:58:58,117 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:58:58,118 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:58:58,118 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:58:58,118 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,118 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:58:58,118 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:58:58,118 INFO L133 ssoRankerPreferences]: Filename of dumped script: c.08.c_Iteration2_Loop [2020-11-29 23:58:58,118 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:58:58,118 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:58:58,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,216 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:58:58,216 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:58,221 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:58:58,221 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,228 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:58:58,228 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_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:58,274 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:58:58,274 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:58,304 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:58:58,304 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,442 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:58:58,443 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:58:58,443 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:58:58,443 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:58:58,443 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:58:58,444 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:58:58,444 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,444 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:58:58,444 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:58:58,444 INFO L133 ssoRankerPreferences]: Filename of dumped script: c.08.c_Iteration2_Loop [2020-11-29 23:58:58,444 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:58:58,444 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:58:58,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,520 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:58:58,520 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:58,527 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:58:58,529 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:58:58,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:58:58,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:58:58,530 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:58:58,539 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 23:58:58,540 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,550 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:58,593 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:58:58,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:58:58,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:58:58,596 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:58:58,596 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:58:58,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:58:58,599 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:58:58,599 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,604 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:58:58,609 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 23:58:58,609 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/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) [2020-11-29 23:58:58,617 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:58:58,617 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:58:58,618 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:58:58,618 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0, ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~j~0 + 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,652 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:58:58,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:58,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:58:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:58,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:58:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:58,687 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 23:58:58,687 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5 Second operand 2 states. [2020-11-29 23:58:58,708 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 13 states and 18 transitions. Complement of second has 5 states. [2020-11-29 23:58:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:58:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 23:58:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 23:58:58,709 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2020-11-29 23:58:58,709 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:58,709 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-29 23:58:58,710 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:58,710 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-29 23:58:58,710 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:58,710 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 18 transitions. [2020-11-29 23:58:58,711 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:58:58,711 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 13 transitions. [2020-11-29 23:58:58,711 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-29 23:58:58,712 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-11-29 23:58:58,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 13 transitions. [2020-11-29 23:58:58,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:58:58,712 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-11-29 23:58:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 13 transitions. [2020-11-29 23:58:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2020-11-29 23:58:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 23:58:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2020-11-29 23:58:58,713 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-29 23:58:58,713 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-29 23:58:58,713 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:58:58,713 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2020-11-29 23:58:58,714 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 23:58:58,714 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:58:58,714 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:58:58,714 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2020-11-29 23:58:58,714 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 23:58:58,715 INFO L794 eck$LassoCheckResult]: Stem: 121#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~i~0, main_~j~0;havoc main_~c~0;havoc main_~i~0;havoc main_~j~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 122#L10-2 assume !!(main_~i~0 >= 0);main_~j~0 := 0; 119#L12-2 assume !(main_~j~0 <= main_~i~0 - 1); 120#L12-3 main_~i~0 := main_~i~0 - 1; 123#L10-2 assume !!(main_~i~0 >= 0);main_~j~0 := 0; 118#L12-2 [2020-11-29 23:58:58,715 INFO L796 eck$LassoCheckResult]: Loop: 118#L12-2 assume !!(main_~j~0 <= main_~i~0 - 1);main_~j~0 := 1 + main_~j~0; 118#L12-2 [2020-11-29 23:58:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:58,715 INFO L82 PathProgramCache]: Analyzing trace with hash 29867642, now seen corresponding path program 2 times [2020-11-29 23:58:58,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:58,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717931636] [2020-11-29 23:58:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:58,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717931636] [2020-11-29 23:58:58,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:58,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:58:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974442712] [2020-11-29 23:58:58,769 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 23:58:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:58,770 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-11-29 23:58:58,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:58,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652858476] [2020-11-29 23:58:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:58,784 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:58,785 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:58,831 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:58:58,831 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:58:58,832 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:58:58,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:58:58,832 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:58:58,832 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,832 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:58:58,832 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:58:58,832 INFO L133 ssoRankerPreferences]: Filename of dumped script: c.08.c_Iteration3_Loop [2020-11-29 23:58:58,832 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:58:58,832 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:58:58,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:58,906 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:58:58,906 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:58,912 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:58:58,912 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,916 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:58:58,916 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_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:58,958 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:58:58,958 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:59,004 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:58:59,005 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:58:59,131 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:58:59,132 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:58:59,132 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:58:59,132 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:58:59,132 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:58:59,132 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:58:59,132 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:59,132 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:58:59,133 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:58:59,133 INFO L133 ssoRankerPreferences]: Filename of dumped script: c.08.c_Iteration3_Loop [2020-11-29 23:58:59,133 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:58:59,133 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:58:59,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:59,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:59,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:58:59,372 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:58:59,373 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:59,379 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:58:59,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:58:59,381 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:58:59,381 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:58:59,381 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:58:59,381 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:58:59,383 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:58:59,383 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:59,387 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:58:59,392 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 23:58:59,392 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3ccf3b40-bc5f-43ba-994c-d1651b757839/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:58:59,400 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:58:59,400 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:58:59,400 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:58:59,400 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~i~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:58:59,435 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:58:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:58:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:59,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:58:59,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:59,476 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 23:58:59,476 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 23:58:59,497 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2020-11-29 23:58:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:58:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 23:58:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 23:58:59,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2020-11-29 23:58:59,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:59,500 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 23:58:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:58:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:59,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:58:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:59,529 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 23:58:59,529 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 23:58:59,548 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2020-11-29 23:58:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:58:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 23:58:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 23:58:59,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2020-11-29 23:58:59,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:59,549 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 23:58:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:59,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:58:59,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:59,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:58:59,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:59,580 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 23:58:59,581 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 23:58:59,597 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 9 states and 11 transitions. Complement of second has 4 states. [2020-11-29 23:58:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:58:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 23:58:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-11-29 23:58:59,598 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 1 letters. [2020-11-29 23:58:59,598 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:59,599 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2020-11-29 23:58:59,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:59,599 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2020-11-29 23:58:59,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:58:59,599 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 11 transitions. [2020-11-29 23:58:59,600 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:58:59,600 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 0 states and 0 transitions. [2020-11-29 23:58:59,600 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 23:58:59,600 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 23:58:59,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 23:58:59,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:58:59,600 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:58:59,601 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:58:59,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:58:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:58:59,605 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 5 states. [2020-11-29 23:58:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:59,607 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-29 23:58:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:58:59,607 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-29 23:58:59,607 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:58:59,607 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 23:58:59,607 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 23:58:59,607 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 23:58:59,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 23:58:59,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:58:59,608 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:58:59,608 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:58:59,608 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:58:59,608 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 23:58:59,608 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:58:59,608 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:58:59,608 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 23:58:59,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:58:59 BoogieIcfgContainer [2020-11-29 23:58:59,613 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:58:59,614 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:58:59,614 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:58:59,614 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:58:59,614 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:56" (3/4) ... [2020-11-29 23:58:59,617 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 23:58:59,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:58:59,619 INFO L168 Benchmark]: Toolchain (without parser) took 3657.58 ms. Allocated memory was 77.6 MB in the beginning and 117.4 MB in the end (delta: 39.8 MB). Free memory was 45.7 MB in the beginning and 52.7 MB in the end (delta: -7.0 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:59,619 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 57.0 MB in the beginning and 56.9 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:59,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.72 ms. Allocated memory was 77.6 MB in the beginning and 96.5 MB in the end (delta: 18.9 MB). Free memory was 45.6 MB in the beginning and 73.4 MB in the end (delta: -27.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:59,621 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.87 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:59,621 INFO L168 Benchmark]: Boogie Preprocessor took 18.81 ms. Allocated memory is still 96.5 MB. Free memory was 72.3 MB in the beginning and 71.4 MB in the end (delta: 896.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:59,622 INFO L168 Benchmark]: RCFGBuilder took 245.28 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 63.2 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:59,623 INFO L168 Benchmark]: BuchiAutomizer took 3046.16 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.9 MB in the beginning and 52.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:59,623 INFO L168 Benchmark]: Witness Printer took 3.26 ms. Allocated memory is still 117.4 MB. Free memory is still 52.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:59,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 57.0 MB in the beginning and 56.9 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.72 ms. Allocated memory was 77.6 MB in the beginning and 96.5 MB in the end (delta: 18.9 MB). Free memory was 45.6 MB in the beginning and 73.4 MB in the end (delta: -27.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.87 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.81 ms. Allocated memory is still 96.5 MB. Free memory was 72.3 MB in the beginning and 71.4 MB in the end (delta: 896.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 245.28 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 63.2 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3046.16 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.9 MB in the beginning and 52.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. * Witness Printer took 3.26 ms. Allocated memory is still 117.4 MB. Free memory is still 52.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (1 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * i + 1 and consists of 5 locations. One deterministic module has affine ranking function -1 * j + i and consists of 3 locations. One nondeterministic module has affine ranking function i + -1 * j and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.9s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 6 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 21 SDslu, 6 SDs, 0 SdLazy, 39 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax187 hnf98 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq151 hnf93 smp96 dnf100 smp100 tf110 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 26ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...