./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9918b49e0d76e4ce36b6a6760021b33460a8ae9b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:56:48,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:48,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:48,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:48,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:48,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:48,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:48,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:48,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:48,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:48,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:48,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:48,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:48,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:48,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:48,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:48,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:48,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:48,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:48,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:48,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:48,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:48,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:48,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:48,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:48,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:48,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:48,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:48,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:48,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:48,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:48,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:48,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:48,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:48,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:48,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:48,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:48,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:48,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:48,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:48,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:48,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-10-22 08:56:48,311 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:48,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:48,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:48,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:48,315 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:48,315 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 08:56:48,315 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 08:56:48,316 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 08:56:48,316 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 08:56:48,316 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 08:56:48,316 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 08:56:48,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:48,317 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:48,317 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:56:48,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:48,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:48,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:48,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 08:56:48,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 08:56:48,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 08:56:48,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:48,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:56:48,319 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 08:56:48,319 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:48,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 08:56:48,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:48,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:48,321 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 08:56:48,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:48,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:48,322 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 08:56:48,323 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 08:56:48,323 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9918b49e0d76e4ce36b6a6760021b33460a8ae9b [2019-10-22 08:56:48,363 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:48,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:48,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:48,383 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:48,383 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:48,384 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/../../sv-benchmarks/c/bitvector/gcd_4.c [2019-10-22 08:56:48,443 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/data/45ab2a53a/c36e82cfa7fe410da8c7e4c0746fdc67/FLAGeb3cb9445 [2019-10-22 08:56:48,805 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:48,805 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/sv-benchmarks/c/bitvector/gcd_4.c [2019-10-22 08:56:48,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/data/45ab2a53a/c36e82cfa7fe410da8c7e4c0746fdc67/FLAGeb3cb9445 [2019-10-22 08:56:49,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/data/45ab2a53a/c36e82cfa7fe410da8c7e4c0746fdc67 [2019-10-22 08:56:49,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:49,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:56:49,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:49,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:49,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:49,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b59223a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49, skipping insertion in model container [2019-10-22 08:56:49,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,223 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:49,240 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:49,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:49,396 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:49,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:49,502 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:49,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49 WrapperNode [2019-10-22 08:56:49,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:49,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:49,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:56:49,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:56:49,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:49,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:49,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:49,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:49,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... [2019-10-22 08:56:49,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:49,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:49,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:49,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:49,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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 [2019-10-22 08:56:49,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:49,903 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:49,903 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-10-22 08:56:49,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:49 BoogieIcfgContainer [2019-10-22 08:56:49,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:49,906 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 08:56:49,906 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 08:56:49,913 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 08:56:49,914 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:56:49,914 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 08:56:49" (1/3) ... [2019-10-22 08:56:49,915 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43a702c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:56:49, skipping insertion in model container [2019-10-22 08:56:49,916 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:56:49,932 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:49" (2/3) ... [2019-10-22 08:56:49,932 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43a702c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:56:49, skipping insertion in model container [2019-10-22 08:56:49,933 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:56:49,936 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:49" (3/3) ... [2019-10-22 08:56:49,938 INFO L371 chiAutomizerObserver]: Analyzing ICFG gcd_4.c [2019-10-22 08:56:50,042 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 08:56:50,042 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 08:56:50,042 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 08:56:50,042 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:50,042 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:50,042 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 08:56:50,043 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:50,043 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 08:56:50,075 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-10-22 08:56:50,097 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:50,098 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:50,098 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:50,105 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-10-22 08:56:50,105 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:50,105 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 08:56:50,105 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-10-22 08:56:50,107 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:50,107 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:50,107 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:50,108 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-10-22 08:56:50,108 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:50,116 INFO L791 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 15#L12true assume !(gcd_test_~a < 0); 12#L12-2true assume !(gcd_test_~b < 0); 16#L13-1true assume !(0 == gcd_test_~a); 8#L20-2true [2019-10-22 08:56:50,116 INFO L793 eck$LassoCheckResult]: Loop: 8#L20-2true assume !!(0 != gcd_test_~b); 10#L20true assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 8#L20-2true [2019-10-22 08:56:50,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,122 INFO L82 PathProgramCache]: Analyzing trace with hash 959468, now seen corresponding path program 1 times [2019-10-22 08:56:50,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317360271] [2019-10-22 08:56:50,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,253 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 1 times [2019-10-22 08:56:50,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011154979] [2019-10-22 08:56:50,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,270 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash 922049617, now seen corresponding path program 1 times [2019-10-22 08:56:50,272 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016132257] [2019-10-22 08:56:50,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:50,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016132257] [2019-10-22 08:56:50,358 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:50,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-10-22 08:56:50,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252239313] [2019-10-22 08:56:50,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:50,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:56:50,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:56:50,422 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-22 08:56:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:50,470 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-10-22 08:56:50,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:56:50,474 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 23 transitions. [2019-10-22 08:56:50,476 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:50,481 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 8 states and 9 transitions. [2019-10-22 08:56:50,482 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-10-22 08:56:50,482 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-10-22 08:56:50,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2019-10-22 08:56:50,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:56:50,484 INFO L688 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 08:56:50,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2019-10-22 08:56:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 08:56:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 08:56:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 08:56:50,513 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 08:56:50,513 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 08:56:50,513 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 08:56:50,513 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2019-10-22 08:56:50,514 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:50,514 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:50,514 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:50,515 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2019-10-22 08:56:50,515 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:50,515 INFO L791 eck$LassoCheckResult]: Stem: 55#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 56#L12 assume !(gcd_test_~a < 0); 53#L12-2 assume !(gcd_test_~b < 0); 54#L13-1 assume !(0 == gcd_test_~a); 57#L20-2 assume !!(0 != gcd_test_~b); 60#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 58#L20-2 [2019-10-22 08:56:50,515 INFO L793 eck$LassoCheckResult]: Loop: 58#L20-2 assume !!(0 != gcd_test_~b); 59#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 58#L20-2 [2019-10-22 08:56:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,515 INFO L82 PathProgramCache]: Analyzing trace with hash 922049615, now seen corresponding path program 1 times [2019-10-22 08:56:50,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093940460] [2019-10-22 08:56:50,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,543 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 2 times [2019-10-22 08:56:50,552 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439872549] [2019-10-22 08:56:50,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,563 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1326417908, now seen corresponding path program 1 times [2019-10-22 08:56:50,564 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809750044] [2019-10-22 08:56:50,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:50,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809750044] [2019-10-22 08:56:50,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997519170] [2019-10-22 08:56:50,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:50,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:50,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:50,692 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:50,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2019-10-22 08:56:50,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179927677] [2019-10-22 08:56:50,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:50,711 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 6 states. [2019-10-22 08:56:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:50,740 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-10-22 08:56:50,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:50,741 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2019-10-22 08:56:50,741 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:50,742 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2019-10-22 08:56:50,742 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-10-22 08:56:50,742 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-10-22 08:56:50,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2019-10-22 08:56:50,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:56:50,742 INFO L688 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-10-22 08:56:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2019-10-22 08:56:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-10-22 08:56:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 08:56:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-10-22 08:56:50,744 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-10-22 08:56:50,744 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-10-22 08:56:50,744 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 08:56:50,744 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2019-10-22 08:56:50,745 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:50,745 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:50,745 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:50,746 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2019-10-22 08:56:50,746 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:50,746 INFO L791 eck$LassoCheckResult]: Stem: 105#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 106#L12 assume !(gcd_test_~a < 0); 103#L12-2 assume !(gcd_test_~b < 0); 104#L13-1 assume !(0 == gcd_test_~a); 107#L20-2 assume !!(0 != gcd_test_~b); 110#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 108#L20-2 assume !!(0 != gcd_test_~b); 109#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 112#L20-2 [2019-10-22 08:56:50,746 INFO L793 eck$LassoCheckResult]: Loop: 112#L20-2 assume !!(0 != gcd_test_~b); 111#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 112#L20-2 [2019-10-22 08:56:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1326417906, now seen corresponding path program 2 times [2019-10-22 08:56:50,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091546332] [2019-10-22 08:56:50,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,770 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 3 times [2019-10-22 08:56:50,771 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203027178] [2019-10-22 08:56:50,771 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,771 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:50,783 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash -917678377, now seen corresponding path program 2 times [2019-10-22 08:56:50,783 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:50,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405589448] [2019-10-22 08:56:50,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:50,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:50,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405589448] [2019-10-22 08:56:50,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725337029] [2019-10-22 08:56:50,866 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:50,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:56:50,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:50,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:56:50,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:50,979 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:50,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-10-22 08:56:50,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449834944] [2019-10-22 08:56:50,999 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:51,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:56:51,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:51,000 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 8 states. [2019-10-22 08:56:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:51,053 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-10-22 08:56:51,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:51,055 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2019-10-22 08:56:51,056 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:51,056 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2019-10-22 08:56:51,056 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-10-22 08:56:51,057 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-10-22 08:56:51,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2019-10-22 08:56:51,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:56:51,057 INFO L688 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-10-22 08:56:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2019-10-22 08:56:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 08:56:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 08:56:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-10-22 08:56:51,059 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-10-22 08:56:51,059 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-10-22 08:56:51,060 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 08:56:51,060 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2019-10-22 08:56:51,060 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:51,060 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:51,061 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:51,061 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1] [2019-10-22 08:56:51,061 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:51,061 INFO L791 eck$LassoCheckResult]: Stem: 167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 168#L12 assume !(gcd_test_~a < 0); 165#L12-2 assume !(gcd_test_~b < 0); 166#L13-1 assume !(0 == gcd_test_~a); 169#L20-2 assume !!(0 != gcd_test_~b); 172#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 170#L20-2 assume !!(0 != gcd_test_~b); 171#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 176#L20-2 assume !!(0 != gcd_test_~b); 175#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 174#L20-2 [2019-10-22 08:56:51,061 INFO L793 eck$LassoCheckResult]: Loop: 174#L20-2 assume !!(0 != gcd_test_~b); 173#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 174#L20-2 [2019-10-22 08:56:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash -917678379, now seen corresponding path program 3 times [2019-10-22 08:56:51,062 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:51,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89539405] [2019-10-22 08:56:51,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:51,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:51,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:51,078 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 4 times [2019-10-22 08:56:51,078 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:51,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296660351] [2019-10-22 08:56:51,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:51,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:51,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:51,085 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1420625670, now seen corresponding path program 3 times [2019-10-22 08:56:51,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:51,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164478076] [2019-10-22 08:56:51,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:51,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:51,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:51,102 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:51,214 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:51,214 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:51,215 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:51,215 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:51,215 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:51,215 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:51,216 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:51,216 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:51,216 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration4_Lasso [2019-10-22 08:56:51,216 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:51,216 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:51,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,384 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:51,385 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) [2019-10-22 08:56:51,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:51,397 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) [2019-10-22 08:56:51,419 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:51,419 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 [2019-10-22 08:56:51,867 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:51,870 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:51,870 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:51,871 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:51,871 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:51,871 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:51,871 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:51,871 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:51,871 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:51,871 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration4_Lasso [2019-10-22 08:56:51,871 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:51,872 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:51,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,896 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:51,983 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:51,988 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:51,990 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 [2019-10-22 08:56:51,991 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:51,992 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:51,993 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:51,993 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:51,993 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:51,995 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:51,995 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:51,997 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:51,997 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 [2019-10-22 08:56:51,998 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:51,998 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:51,998 INFO L203 nArgumentSynthesizer]: 2 loop disjuncts [2019-10-22 08:56:51,998 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:52,017 INFO L400 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-10-22 08:56:52,017 INFO L401 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-10-22 08:56:52,161 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:52,288 INFO L443 ModelExtractionUtils]: Simplification made 7 calls to the SMT solver. [2019-10-22 08:56:52,288 INFO L444 ModelExtractionUtils]: 26 out of 36 variables were initially zero. Simplification set additionally 4 variables to zero. [2019-10-22 08:56:52,291 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:52,294 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 4. [2019-10-22 08:56:52,295 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:52,296 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_gcd_test_~b) = 1*ULTIMATE.start_gcd_test_~b Supporting invariants [1*ULTIMATE.start_gcd_test_~a - 1 >= 0, 1*ULTIMATE.start_gcd_test_~b >= 0] [2019-10-22 08:56:52,303 INFO L297 tatePredicateManager]: 1 out of 2 supporting invariants were superfluous and have been removed [2019-10-22 08:56:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:52,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 08:56:52,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:52,407 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:56:52,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:52,412 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.4 stem predicates 1 loop predicates [2019-10-22 08:56:52,413 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 6 states. [2019-10-22 08:56:52,509 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 13 transitions. cyclomatic complexity: 2. Second operand 6 states. Result 19 states and 22 transitions. Complement of second has 5 states. [2019-10-22 08:56:52,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 08:56:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-10-22 08:56:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-10-22 08:56:52,512 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 2 letters. [2019-10-22 08:56:52,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:52,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 12 letters. Loop has 2 letters. [2019-10-22 08:56:52,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:52,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 4 letters. [2019-10-22 08:56:52,515 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:52,515 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 22 transitions. [2019-10-22 08:56:52,516 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:52,517 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 22 transitions. [2019-10-22 08:56:52,517 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-10-22 08:56:52,517 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2019-10-22 08:56:52,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 22 transitions. [2019-10-22 08:56:52,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:52,518 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 08:56:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 22 transitions. [2019-10-22 08:56:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2019-10-22 08:56:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-22 08:56:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-10-22 08:56:52,520 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-10-22 08:56:52,520 INFO L591 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-10-22 08:56:52,520 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-10-22 08:56:52,520 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2019-10-22 08:56:52,521 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:52,521 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:52,521 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:52,522 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2019-10-22 08:56:52,522 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:52,522 INFO L791 eck$LassoCheckResult]: Stem: 272#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 273#L12 assume !(gcd_test_~a < 0); 270#L12-2 assume !(gcd_test_~b < 0); 271#L13-1 assume !(0 == gcd_test_~a); 274#L20-2 assume !!(0 != gcd_test_~b); 282#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 280#L20-2 assume !!(0 != gcd_test_~b); 276#L20 [2019-10-22 08:56:52,522 INFO L793 eck$LassoCheckResult]: Loop: 276#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 275#L20-2 assume !!(0 != gcd_test_~b); 276#L20 [2019-10-22 08:56:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1481232980, now seen corresponding path program 4 times [2019-10-22 08:56:52,523 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:52,523 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230990091] [2019-10-22 08:56:52,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:52,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:52,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:52,533 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:52,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 1 times [2019-10-22 08:56:52,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:52,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884945538] [2019-10-22 08:56:52,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:52,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:52,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:52,539 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1830717847, now seen corresponding path program 5 times [2019-10-22 08:56:52,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:52,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638728316] [2019-10-22 08:56:52,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:52,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:52,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:52,550 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:52,564 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:52,565 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:52,565 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:52,565 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:52,565 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:52,565 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:52,565 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:52,565 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:52,566 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration5_Loop [2019-10-22 08:56:52,566 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:52,566 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:52,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:52,610 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:52,610 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:52,637 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:52,637 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) [2019-10-22 08:56:52,651 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:52,652 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:52,788 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:52,788 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=-1} Honda state: {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=-1} Generalized eigenvectors: [{ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=1, ULTIMATE.start_gcd_test_~b=0}] Lambdas: [7, 0, 1] Nus: [1, 0] [2019-10-22 08:56:52,844 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:52,844 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:52,844 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:52,844 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:52,844 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:52,844 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:52,844 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:52,844 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:52,845 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration5_Lasso [2019-10-22 08:56:52,845 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:52,845 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:52,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:52,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:52,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:52,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:52,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:52,983 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:52,983 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) [2019-10-22 08:56:52,994 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:52,994 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:52,998 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:52,998 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) [2019-10-22 08:56:53,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:53,009 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) [2019-10-22 08:56:53,034 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:53,034 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 [2019-10-22 08:56:53,599 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:53,601 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:53,601 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:53,601 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:53,601 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:53,602 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:53,602 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:53,602 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:53,602 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:53,602 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration5_Lasso [2019-10-22 08:56:53,602 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:53,602 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:53,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,734 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:53,734 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:53,735 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 [2019-10-22 08:56:53,736 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:53,736 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:53,736 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:53,736 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:53,736 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:53,737 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:53,737 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:53,738 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:53,738 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 [2019-10-22 08:56:53,738 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:53,739 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:53,739 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:53,739 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:53,739 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:53,739 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:53,740 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:53,740 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:53,740 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 [2019-10-22 08:56:53,741 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:53,741 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:53,741 INFO L203 nArgumentSynthesizer]: 2 loop disjuncts [2019-10-22 08:56:53,741 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:53,748 INFO L400 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-10-22 08:56:53,749 INFO L401 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-10-22 08:56:53,820 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:53,896 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2019-10-22 08:56:53,896 INFO L444 ModelExtractionUtils]: 28 out of 36 variables were initially zero. Simplification set additionally 4 variables to zero. [2019-10-22 08:56:53,896 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:53,899 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-10-22 08:56:53,899 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:53,899 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_gcd_test_~a, ULTIMATE.start_gcd_test_~b) = 1*ULTIMATE.start_gcd_test_~a - 1*ULTIMATE.start_gcd_test_~b Supporting invariants [1*ULTIMATE.start_gcd_test_~b >= 0] [2019-10-22 08:56:53,908 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-10-22 08:56:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:53,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:56:53,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:53,975 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:56:53,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:53,994 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 2 loop predicates [2019-10-22 08:56:53,994 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-10-22 08:56:54,045 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 24 states and 30 transitions. Complement of second has 6 states. [2019-10-22 08:56:54,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 08:56:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-10-22 08:56:54,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 2 letters. [2019-10-22 08:56:54,049 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,049 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 9 letters. Loop has 2 letters. [2019-10-22 08:56:54,049 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,049 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 4 letters. [2019-10-22 08:56:54,049 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 30 transitions. [2019-10-22 08:56:54,050 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:54,050 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 18 states and 22 transitions. [2019-10-22 08:56:54,051 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-10-22 08:56:54,051 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-10-22 08:56:54,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 22 transitions. [2019-10-22 08:56:54,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:54,051 INFO L688 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-10-22 08:56:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 22 transitions. [2019-10-22 08:56:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-10-22 08:56:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-22 08:56:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-22 08:56:54,056 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-22 08:56:54,056 INFO L591 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-22 08:56:54,057 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-10-22 08:56:54,057 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2019-10-22 08:56:54,057 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:54,057 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:54,057 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:54,058 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 3, 1, 1, 1, 1, 1] [2019-10-22 08:56:54,058 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:54,058 INFO L791 eck$LassoCheckResult]: Stem: 370#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 371#L12 assume !(gcd_test_~a < 0); 368#L12-2 assume !(gcd_test_~b < 0); 369#L13-1 assume !(0 == gcd_test_~a); 372#L20-2 assume !!(0 != gcd_test_~b); 377#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 378#L20-2 assume !!(0 != gcd_test_~b); 379#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 375#L20-2 assume !!(0 != gcd_test_~b); 376#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 382#L20-2 assume !!(0 != gcd_test_~b); 381#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 380#L20-2 assume !!(0 != gcd_test_~b); 374#L20 [2019-10-22 08:56:54,058 INFO L793 eck$LassoCheckResult]: Loop: 374#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 373#L20-2 assume !!(0 != gcd_test_~b); 374#L20 [2019-10-22 08:56:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1089722783, now seen corresponding path program 4 times [2019-10-22 08:56:54,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181946228] [2019-10-22 08:56:54,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,074 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 2 times [2019-10-22 08:56:54,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493963699] [2019-10-22 08:56:54,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,084 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 748426718, now seen corresponding path program 5 times [2019-10-22 08:56:54,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949834366] [2019-10-22 08:56:54,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:54,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949834366] [2019-10-22 08:56:54,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632884920] [2019-10-22 08:56:54,147 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:54,182 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 08:56:54,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:54,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 08:56:54,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:54,273 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:54,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-10-22 08:56:54,273 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385676345] [2019-10-22 08:56:54,293 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:54,294 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:54,294 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:54,294 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:54,294 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:54,294 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,294 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:54,294 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:54,294 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration6_Loop [2019-10-22 08:56:54,294 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:54,295 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:54,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,338 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:54,338 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,346 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:54,346 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/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) [2019-10-22 08:56:54,362 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:54,362 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,475 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:54,475 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=-1} Honda state: {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=-1} Generalized eigenvectors: [{ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=1, ULTIMATE.start_gcd_test_~b=0}] Lambdas: [7, 0, 1] Nus: [1, 0] [2019-10-22 08:56:54,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:56:54,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:54,482 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 12 states. [2019-10-22 08:56:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:54,587 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-22 08:56:54,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:56:54,588 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2019-10-22 08:56:54,589 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:54,589 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 19 states and 21 transitions. [2019-10-22 08:56:54,589 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-10-22 08:56:54,589 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-10-22 08:56:54,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2019-10-22 08:56:54,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:54,590 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-22 08:56:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2019-10-22 08:56:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 08:56:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:56:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-22 08:56:54,596 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-22 08:56:54,596 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-22 08:56:54,596 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-10-22 08:56:54,596 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2019-10-22 08:56:54,597 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:56:54,597 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:54,597 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:54,597 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 3, 2, 1, 1, 1, 1] [2019-10-22 08:56:54,598 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:56:54,598 INFO L791 eck$LassoCheckResult]: Stem: 466#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 467#L12 assume !(gcd_test_~a < 0); 464#L12-2 assume !(gcd_test_~b < 0); 465#L13-1 assume !(0 == gcd_test_~a); 468#L20-2 assume !!(0 != gcd_test_~b); 473#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 471#L20-2 assume !!(0 != gcd_test_~b); 472#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 474#L20-2 assume !!(0 != gcd_test_~b); 482#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 481#L20-2 assume !!(0 != gcd_test_~b); 479#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 478#L20-2 assume !!(0 != gcd_test_~b); 477#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 475#L20-2 assume !!(0 != gcd_test_~b); 470#L20 [2019-10-22 08:56:54,598 INFO L793 eck$LassoCheckResult]: Loop: 470#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 469#L20-2 assume !!(0 != gcd_test_~b); 470#L20 [2019-10-22 08:56:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash 748426780, now seen corresponding path program 6 times [2019-10-22 08:56:54,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388219651] [2019-10-22 08:56:54,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:54,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388219651] [2019-10-22 08:56:54,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175923859] [2019-10-22 08:56:54,711 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:54,754 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-22 08:56:54,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:54,756 WARN L254 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 08:56:54,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:54,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:54,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-22 08:56:54,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94793549] [2019-10-22 08:56:54,814 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 08:56:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 3 times [2019-10-22 08:56:54,815 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919889217] [2019-10-22 08:56:54,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,821 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:54,836 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:54,836 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:54,837 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:54,837 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:54,837 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:54,837 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,837 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:54,837 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:54,837 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration7_Loop [2019-10-22 08:56:54,837 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:54,837 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:54,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,882 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:54,882 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:54,896 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1816d25-2097-4f27-bf26-5e247565541b/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,919 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:54,919 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:55,011 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:55,011 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=-1} Honda state: {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=-1} Generalized eigenvectors: [{ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=1, ULTIMATE.start_gcd_test_~b=0}] Lambdas: [7, 0, 1] Nus: [1, 0] [2019-10-22 08:56:55,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:56:55,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:56:55,013 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. cyclomatic complexity: 4 Second operand 9 states. [2019-10-22 08:56:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:55,092 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2019-10-22 08:56:55,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:56:55,093 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 14 transitions. [2019-10-22 08:56:55,094 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:56:55,094 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 0 states and 0 transitions. [2019-10-22 08:56:55,094 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-10-22 08:56:55,094 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-10-22 08:56:55,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-10-22 08:56:55,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:56:55,094 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:55,094 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:55,094 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:55,095 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-10-22 08:56:55,095 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:56:55,095 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:56:55,095 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-10-22 08:56:55,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 08:56:55 BoogieIcfgContainer [2019-10-22 08:56:55,102 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 08:56:55,103 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:55,103 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:55,103 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:55,103 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:49" (3/4) ... [2019-10-22 08:56:55,108 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:56:55,108 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:55,110 INFO L168 Benchmark]: Toolchain (without parser) took 5909.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 945.8 MB in the beginning and 905.7 MB in the end (delta: 40.1 MB). Peak memory consumption was 178.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,111 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:55,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -188.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:55,112 INFO L168 Benchmark]: Boogie Preprocessor took 43.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,113 INFO L168 Benchmark]: RCFGBuilder took 321.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,113 INFO L168 Benchmark]: BuchiAutomizer took 5196.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 905.7 MB in the end (delta: 208.5 MB). Peak memory consumption was 208.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,114 INFO L168 Benchmark]: Witness Printer took 5.25 ms. Allocated memory is still 1.2 GB. Free memory is still 905.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:55,117 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 301.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -188.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 321.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5196.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 905.7 MB in the end (delta: 208.5 MB). Peak memory consumption was 208.5 MB. Max. memory is 11.5 GB. * Witness Printer took 5.25 ms. Allocated memory is still 1.2 GB. Free memory is still 905.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (5 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function b and consists of 4 locations. One deterministic module has affine ranking function a + -1 * b and consists of 4 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.0s and 8 iterations. TraceHistogramMax:6. Analysis of lassos took 4.2s. Construction of modules took 0.2s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 4. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 19 states and ocurred in iteration 6. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 26 SDtfs, 31 SDslu, 12 SDs, 0 SdLazy, 223 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc4 concLT0 SILN1 SILU0 SILI0 SILT0 lasso2 LassoPreprocessingBenchmarks: Lassos: inital28 mio100 ax100 hnf90 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq191 hnf92 smp100 dnf141 smp100 tf102 neg96 sie113 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 297ms VariablesStem: 6 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...