./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 31d0c4253184c01eb9f9573658b07bed7aa94585 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:38:34,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:38:34,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:38:35,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:38:35,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:38:35,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:38:35,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:38:35,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:38:35,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:38:35,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:38:35,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:38:35,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:38:35,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:38:35,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:38:35,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:38:35,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:38:35,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:38:35,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:38:35,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:38:35,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:38:35,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:38:35,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:38:35,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:38:35,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:38:35,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:38:35,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:38:35,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:38:35,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:38:35,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:38:35,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:38:35,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:38:35,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:38:35,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:38:35,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:38:35,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:38:35,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:38:35,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:38:35,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:38:35,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:38:35,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:38:35,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:38:35,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 19:38:35,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:38:35,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:38:35,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:38:35,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:38:35,171 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:38:35,171 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 19:38:35,172 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 19:38:35,172 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 19:38:35,172 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 19:38:35,172 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 19:38:35,174 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 19:38:35,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:38:35,174 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:38:35,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:38:35,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:38:35,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 19:38:35,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 19:38:35,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 19:38:35,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:38:35,176 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 19:38:35,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:38:35,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 19:38:35,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:38:35,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:38:35,177 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 19:38:35,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:38:35,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:38:35,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:38:35,178 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 19:38:35,182 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 19:38:35,183 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d0c4253184c01eb9f9573658b07bed7aa94585 [2020-11-29 19:38:35,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:38:35,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:38:35,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:38:35,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:38:35,565 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:38:35,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2020-11-29 19:38:35,658 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/data/40e0de193/0a4b3f5da5e44a2f89d201fdb9fa0488/FLAGd190ba0ee [2020-11-29 19:38:36,268 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:38:36,269 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2020-11-29 19:38:36,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/data/40e0de193/0a4b3f5da5e44a2f89d201fdb9fa0488/FLAGd190ba0ee [2020-11-29 19:38:36,649 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/data/40e0de193/0a4b3f5da5e44a2f89d201fdb9fa0488 [2020-11-29 19:38:36,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:38:36,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:38:36,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:38:36,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:38:36,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:38:36,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7acfa8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36, skipping insertion in model container [2020-11-29 19:38:36,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:38:36,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:38:36,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:38:36,870 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:38:36,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:38:36,925 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:38:36,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36 WrapperNode [2020-11-29 19:38:36,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:38:36,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:38:36,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:38:36,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:38:36,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:38:36,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:38:36,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:38:36,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:38:36,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... [2020-11-29 19:38:36,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:38:36,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:38:36,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:38:36,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:38:36,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:38:37,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:38:37,260 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:38:37,260 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 19:38:37,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:38:37 BoogieIcfgContainer [2020-11-29 19:38:37,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:38:37,263 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 19:38:37,263 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 19:38:37,267 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 19:38:37,268 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:38:37,268 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 07:38:36" (1/3) ... [2020-11-29 19:38:37,270 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@595c19bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:38:37, skipping insertion in model container [2020-11-29 19:38:37,270 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:38:37,270 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:38:36" (2/3) ... [2020-11-29 19:38:37,270 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@595c19bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:38:37, skipping insertion in model container [2020-11-29 19:38:37,271 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:38:37,271 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:38:37" (3/3) ... [2020-11-29 19:38:37,272 INFO L373 chiAutomizerObserver]: Analyzing ICFG Urban-WST2013-Fig2.c [2020-11-29 19:38:37,339 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 19:38:37,339 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 19:38:37,339 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 19:38:37,339 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:38:37,340 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:38:37,340 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 19:38:37,340 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:38:37,340 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 19:38:37,353 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:38:37,372 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:38:37,373 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:37,373 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:37,379 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:37,379 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:38:37,380 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 19:38:37,380 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:38:37,381 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:38:37,381 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:37,382 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:37,382 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:37,382 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:38:37,390 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L19-2true [2020-11-29 19:38:37,390 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 9#L21-2true assume !(main_~x2~0 > 1); 8#L21-3true main_~x1~0 := 1 + main_~x1~0; 6#L19-2true [2020-11-29 19:38:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 19:38:37,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:37,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532575983] [2020-11-29 19:38:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:37,509 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:37,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:37,543 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-11-29 19:38:37,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:37,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086095855] [2020-11-29 19:38:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086095855] [2020-11-29 19:38:37,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:38:37,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:38:37,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128100036] [2020-11-29 19:38:37,761 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:37,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:38:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:38:37,791 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-11-29 19:38:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:37,815 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-29 19:38:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:38:37,818 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-29 19:38:37,819 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 19:38:37,823 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2020-11-29 19:38:37,824 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-11-29 19:38:37,824 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-11-29 19:38:37,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2020-11-29 19:38:37,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:37,826 INFO L691 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-29 19:38:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2020-11-29 19:38:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-11-29 19:38:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 19:38:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2020-11-29 19:38:37,854 INFO L714 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-29 19:38:37,854 INFO L594 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-29 19:38:37,854 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 19:38:37,854 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2020-11-29 19:38:37,855 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 19:38:37,855 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:37,855 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:37,855 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:37,856 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 19:38:37,856 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L19-2 [2020-11-29 19:38:37,856 INFO L796 eck$LassoCheckResult]: Loop: 27#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 28#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 30#L21-2 assume !(main_~x2~0 > 1); 29#L21-3 main_~x1~0 := 1 + main_~x1~0; 27#L19-2 [2020-11-29 19:38:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-29 19:38:37,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:37,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320821642] [2020-11-29 19:38:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:37,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:37,866 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:37,868 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:37,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2020-11-29 19:38:37,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:37,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899886674] [2020-11-29 19:38:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899886674] [2020-11-29 19:38:37,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108902670] [2020-11-29 19:38:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/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 [2020-11-29 19:38:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:38:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:38,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-11-29 19:38:38,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631326684] [2020-11-29 19:38:38,053 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:38,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:38:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:38:38,055 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 4 states. [2020-11-29 19:38:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:38,091 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2020-11-29 19:38:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:38:38,093 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2020-11-29 19:38:38,094 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 19:38:38,094 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2020-11-29 19:38:38,094 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-29 19:38:38,095 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-11-29 19:38:38,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2020-11-29 19:38:38,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:38,113 INFO L691 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 19:38:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2020-11-29 19:38:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-11-29 19:38:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 19:38:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-11-29 19:38:38,123 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 19:38:38,124 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 19:38:38,124 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 19:38:38,125 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-11-29 19:38:38,125 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 19:38:38,126 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:38,126 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:38,127 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:38,127 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2020-11-29 19:38:38,128 INFO L794 eck$LassoCheckResult]: Stem: 53#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 54#L19-2 [2020-11-29 19:38:38,128 INFO L796 eck$LassoCheckResult]: Loop: 54#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 55#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 57#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 58#L21-2 assume !(main_~x2~0 > 1); 56#L21-3 main_~x1~0 := 1 + main_~x1~0; 54#L19-2 [2020-11-29 19:38:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2020-11-29 19:38:38,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311137782] [2020-11-29 19:38:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,162 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,165 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2020-11-29 19:38:38,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373864161] [2020-11-29 19:38:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373864161] [2020-11-29 19:38:38,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535353124] [2020-11-29 19:38:38,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/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 [2020-11-29 19:38:38,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:38:38,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:38:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:38:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:38,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-11-29 19:38:38,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893881784] [2020-11-29 19:38:38,308 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:38,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:38:38,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:38:38,309 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 5 states. [2020-11-29 19:38:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:38,328 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2020-11-29 19:38:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:38:38,328 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2020-11-29 19:38:38,329 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-29 19:38:38,330 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2020-11-29 19:38:38,330 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-29 19:38:38,330 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 19:38:38,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-11-29 19:38:38,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:38,330 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 19:38:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-11-29 19:38:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 19:38:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 19:38:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-11-29 19:38:38,332 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 19:38:38,332 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 19:38:38,332 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 19:38:38,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2020-11-29 19:38:38,333 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-29 19:38:38,333 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:38,333 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:38,334 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:38,334 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2020-11-29 19:38:38,334 INFO L794 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 87#L19-2 [2020-11-29 19:38:38,334 INFO L796 eck$LassoCheckResult]: Loop: 87#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 88#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 90#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 92#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 91#L21-2 assume !(main_~x2~0 > 1); 89#L21-3 main_~x1~0 := 1 + main_~x1~0; 87#L19-2 [2020-11-29 19:38:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2020-11-29 19:38:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251770782] [2020-11-29 19:38:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,351 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2020-11-29 19:38:38,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917203408] [2020-11-29 19:38:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917203408] [2020-11-29 19:38:38,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921444812] [2020-11-29 19:38:38,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 19:38:38,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 19:38:38,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:38:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:38:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:38:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:38,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 19:38:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724584566] [2020-11-29 19:38:38,544 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:38,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:38:38,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:38:38,545 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-11-29 19:38:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:38,574 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-11-29 19:38:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:38:38,575 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-11-29 19:38:38,576 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:38:38,576 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2020-11-29 19:38:38,576 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-29 19:38:38,577 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-29 19:38:38,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-11-29 19:38:38,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:38,577 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:38:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-11-29 19:38:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-29 19:38:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 19:38:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-29 19:38:38,579 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:38:38,580 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:38:38,580 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 19:38:38,580 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-11-29 19:38:38,581 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:38:38,581 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:38,581 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:38,581 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:38,582 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2020-11-29 19:38:38,582 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 126#L19-2 [2020-11-29 19:38:38,582 INFO L796 eck$LassoCheckResult]: Loop: 126#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 127#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 129#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 132#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 131#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 130#L21-2 assume !(main_~x2~0 > 1); 128#L21-3 main_~x1~0 := 1 + main_~x1~0; 126#L19-2 [2020-11-29 19:38:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2020-11-29 19:38:38,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396240830] [2020-11-29 19:38:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,590 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,592 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2020-11-29 19:38:38,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142755066] [2020-11-29 19:38:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142755066] [2020-11-29 19:38:38,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098099744] [2020-11-29 19:38:38,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 19:38:38,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:38:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:38:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:38:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:38,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 19:38:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634693698] [2020-11-29 19:38:38,787 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:38:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:38:38,788 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 7 states. [2020-11-29 19:38:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:38,815 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-29 19:38:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:38:38,816 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-29 19:38:38,817 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 19:38:38,817 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2020-11-29 19:38:38,817 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-29 19:38:38,818 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-11-29 19:38:38,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2020-11-29 19:38:38,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:38,818 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-29 19:38:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2020-11-29 19:38:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 19:38:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 19:38:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-29 19:38:38,820 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-29 19:38:38,820 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-29 19:38:38,820 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 19:38:38,820 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2020-11-29 19:38:38,821 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 19:38:38,821 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:38,821 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:38,821 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:38,822 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2020-11-29 19:38:38,822 INFO L794 eck$LassoCheckResult]: Stem: 170#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 171#L19-2 [2020-11-29 19:38:38,822 INFO L796 eck$LassoCheckResult]: Loop: 171#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 172#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 174#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 178#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 177#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 176#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 175#L21-2 assume !(main_~x2~0 > 1); 173#L21-3 main_~x1~0 := 1 + main_~x1~0; 171#L19-2 [2020-11-29 19:38:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2020-11-29 19:38:38,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010929534] [2020-11-29 19:38:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:38,829 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:38,834 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:38,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2020-11-29 19:38:38,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:38,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538379485] [2020-11-29 19:38:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:38,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538379485] [2020-11-29 19:38:38,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940027769] [2020-11-29 19:38:38,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:38:38,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 19:38:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:38:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:38:38,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:39,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:39,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 19:38:39,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519017651] [2020-11-29 19:38:39,008 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:39,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:38:39,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:38:39,009 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 8 states. [2020-11-29 19:38:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:39,047 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2020-11-29 19:38:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:38:39,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2020-11-29 19:38:39,049 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:38:39,050 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2020-11-29 19:38:39,050 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-11-29 19:38:39,050 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-29 19:38:39,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2020-11-29 19:38:39,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:39,051 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 19:38:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2020-11-29 19:38:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 19:38:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 19:38:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-29 19:38:39,053 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 19:38:39,053 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 19:38:39,053 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 19:38:39,053 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2020-11-29 19:38:39,054 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:38:39,054 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:39,054 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:39,054 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:39,054 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2020-11-29 19:38:39,055 INFO L794 eck$LassoCheckResult]: Stem: 221#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 222#L19-2 [2020-11-29 19:38:39,055 INFO L796 eck$LassoCheckResult]: Loop: 222#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 223#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 225#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 230#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 229#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 228#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 227#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 226#L21-2 assume !(main_~x2~0 > 1); 224#L21-3 main_~x1~0 := 1 + main_~x1~0; 222#L19-2 [2020-11-29 19:38:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2020-11-29 19:38:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274601550] [2020-11-29 19:38:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,066 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2020-11-29 19:38:39,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878210117] [2020-11-29 19:38:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:39,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878210117] [2020-11-29 19:38:39,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204154119] [2020-11-29 19:38:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 19:38:39,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 19:38:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:38:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:38:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:38:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:39,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:39,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 19:38:39,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583245517] [2020-11-29 19:38:39,298 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:39,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:38:39,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:38:39,300 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 9 states. [2020-11-29 19:38:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:39,419 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-29 19:38:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:38:39,420 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2020-11-29 19:38:39,421 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 19:38:39,421 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2020-11-29 19:38:39,421 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-29 19:38:39,421 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-29 19:38:39,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-11-29 19:38:39,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:39,422 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-29 19:38:39,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-11-29 19:38:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 19:38:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 19:38:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-29 19:38:39,424 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-29 19:38:39,424 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-29 19:38:39,424 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 19:38:39,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2020-11-29 19:38:39,425 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 19:38:39,425 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:39,425 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:39,425 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:39,425 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2020-11-29 19:38:39,425 INFO L794 eck$LassoCheckResult]: Stem: 278#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 279#L19-2 [2020-11-29 19:38:39,426 INFO L796 eck$LassoCheckResult]: Loop: 279#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 280#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 282#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 288#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 287#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 286#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 285#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 284#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 283#L21-2 assume !(main_~x2~0 > 1); 281#L21-3 main_~x1~0 := 1 + main_~x1~0; 279#L19-2 [2020-11-29 19:38:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2020-11-29 19:38:39,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647000159] [2020-11-29 19:38:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,431 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,433 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,434 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,435 INFO L82 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2020-11-29 19:38:39,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186082888] [2020-11-29 19:38:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:39,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186082888] [2020-11-29 19:38:39,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96908534] [2020-11-29 19:38:39,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:38:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:39,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:38:39,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:39,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:39,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 19:38:39,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032474568] [2020-11-29 19:38:39,617 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:39,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:38:39,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:38:39,621 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 10 states. [2020-11-29 19:38:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:39,656 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-29 19:38:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:38:39,657 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2020-11-29 19:38:39,658 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-11-29 19:38:39,658 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 19:38:39,658 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-11-29 19:38:39,658 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-29 19:38:39,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2020-11-29 19:38:39,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:39,659 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 19:38:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2020-11-29 19:38:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 19:38:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 19:38:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 19:38:39,661 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 19:38:39,661 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 19:38:39,661 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 19:38:39,661 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2020-11-29 19:38:39,661 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-11-29 19:38:39,661 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:39,662 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:39,662 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:39,662 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2020-11-29 19:38:39,662 INFO L794 eck$LassoCheckResult]: Stem: 341#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 342#L19-2 [2020-11-29 19:38:39,662 INFO L796 eck$LassoCheckResult]: Loop: 342#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 343#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 345#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 352#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 351#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 350#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 349#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 348#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 347#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 346#L21-2 assume !(main_~x2~0 > 1); 344#L21-3 main_~x1~0 := 1 + main_~x1~0; 342#L19-2 [2020-11-29 19:38:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2020-11-29 19:38:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742025813] [2020-11-29 19:38:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,670 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,681 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2020-11-29 19:38:39,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919574287] [2020-11-29 19:38:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919574287] [2020-11-29 19:38:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596786400] [2020-11-29 19:38:39,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:38:39,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:38:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:38:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:38:39,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:39,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:38:39,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 19:38:39,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191514973] [2020-11-29 19:38:39,917 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:38:39,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:38:39,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:38:39,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:38:39,918 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 11 states. [2020-11-29 19:38:39,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:38:39,969 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-29 19:38:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:38:39,971 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-11-29 19:38:39,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-29 19:38:39,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 19:38:39,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-29 19:38:39,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-11-29 19:38:39,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2020-11-29 19:38:39,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:39,973 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 19:38:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2020-11-29 19:38:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 19:38:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 19:38:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 19:38:39,974 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 19:38:39,974 INFO L594 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 19:38:39,974 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 19:38:39,974 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2020-11-29 19:38:39,975 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-29 19:38:39,975 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:39,975 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:39,975 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:38:39,975 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2020-11-29 19:38:39,975 INFO L794 eck$LassoCheckResult]: Stem: 410#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 411#L19-2 [2020-11-29 19:38:39,976 INFO L796 eck$LassoCheckResult]: Loop: 411#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 412#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 414#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 422#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 421#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 420#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 419#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 418#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 417#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 416#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 415#L21-2 assume !(main_~x2~0 > 1); 413#L21-3 main_~x1~0 := 1 + main_~x1~0; 411#L19-2 [2020-11-29 19:38:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2020-11-29 19:38:39,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550026420] [2020-11-29 19:38:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,981 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:39,982 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:39,982 INFO L82 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2020-11-29 19:38:39,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:39,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856977262] [2020-11-29 19:38:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:39,992 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:40,000 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:40,006 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2020-11-29 19:38:40,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:40,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987635708] [2020-11-29 19:38:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:40,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:40,049 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:40,051 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:40,166 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-11-29 19:38:40,198 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:38:40,198 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:38:40,198 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:38:40,199 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:38:40,199 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:38:40,199 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,199 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:38:40,199 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:38:40,200 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2020-11-29 19:38:40,200 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:38:40,200 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:38:40,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,312 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:38:40,313 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:40,325 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:40,325 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,337 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:38:40,337 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,388 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:40,388 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:38:40,394 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:38:40,394 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:40,440 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:38:40,476 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:38:40,522 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:38:40,524 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:38:40,524 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:38:40,525 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:38:40,525 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:38:40,525 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:38:40,525 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,525 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:38:40,525 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:38:40,525 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2020-11-29 19:38:40,525 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:38:40,525 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:38:40,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:40,665 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:38:40,669 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,677 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:38:40,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:40,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:40,679 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:40,679 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:38:40,688 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:38:40,688 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:38:40,699 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:40,753 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:38:40,755 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:40,756 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:40,756 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:40,756 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:38:40,762 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:38:40,762 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,769 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:40,817 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:38:40,821 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:40,821 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:38:40,822 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:40,822 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:40,822 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:38:40,824 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:38:40,824 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,830 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:38:40,835 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:38:40,835 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:40,847 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:38:40,848 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:38:40,848 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:38:40,848 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x1~0) = -2*ULTIMATE.start_main_~x1~0 + 21 Supporting invariants [] Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:40,892 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:38:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:40,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:38:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:40,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:38:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 19:38:40,977 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-29 19:38:40,978 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-29 19:38:41,008 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 25 states and 28 transitions. Complement of second has 4 states. [2020-11-29 19:38:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:38:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:38:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:38:41,011 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2020-11-29 19:38:41,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:41,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2020-11-29 19:38:41,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:41,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2020-11-29 19:38:41,013 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:41,013 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2020-11-29 19:38:41,014 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:38:41,015 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2020-11-29 19:38:41,015 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-29 19:38:41,015 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-29 19:38:41,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2020-11-29 19:38:41,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:38:41,016 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-29 19:38:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2020-11-29 19:38:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2020-11-29 19:38:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 19:38:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-29 19:38:41,019 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-29 19:38:41,019 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-29 19:38:41,019 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-29 19:38:41,019 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2020-11-29 19:38:41,020 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:38:41,020 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:41,020 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:41,020 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 19:38:41,021 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:38:41,021 INFO L794 eck$LassoCheckResult]: Stem: 507#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 508#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 510#L21-2 [2020-11-29 19:38:41,021 INFO L796 eck$LassoCheckResult]: Loop: 510#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 510#L21-2 [2020-11-29 19:38:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:41,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 19:38:41,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:41,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974848529] [2020-11-29 19:38:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,026 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,030 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-11-29 19:38:41,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:41,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973970083] [2020-11-29 19:38:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,037 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,037 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-11-29 19:38:41,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:41,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260461801] [2020-11-29 19:38:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,046 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,047 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:41,064 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:38:41,064 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:38:41,064 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:38:41,064 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:38:41,064 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:38:41,065 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,065 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:38:41,065 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:38:41,065 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2020-11-29 19:38:41,065 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:38:41,065 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:38:41,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,133 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:38:41,134 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:41,144 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:38:41,148 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:38:41,148 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:41,196 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:38:41,199 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:38:41,200 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:41,260 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:41,260 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:41,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:38:41,313 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,358 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:38:41,361 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:38:41,361 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:38:41,361 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:38:41,361 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:38:41,361 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:38:41,361 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,361 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:38:41,361 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:38:41,362 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2020-11-29 19:38:41,362 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:38:41,362 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:38:41,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,442 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:38:41,442 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:41,452 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:38:41,454 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:41,454 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:41,454 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:41,454 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:38:41,462 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:38:41,463 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,468 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:41,514 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:38:41,516 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:41,516 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:41,516 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:41,516 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:38:41,520 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:38:41,520 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,529 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:41,570 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,573 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:41,573 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:38:41,573 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:41,573 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:41,573 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:38:41,575 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:38:41,575 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:38:41,578 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:38:41,581 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 19:38:41,581 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:41,589 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:38:41,589 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:38:41,590 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:38:41,590 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,626 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:38:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:38:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:41,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:38:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:41,667 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:38:41,667 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 2 states. [2020-11-29 19:38:41,686 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 31 states and 36 transitions. Complement of second has 5 states. [2020-11-29 19:38:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:38:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:38:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:38:41,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2020-11-29 19:38:41,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:41,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-29 19:38:41,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:41,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-29 19:38:41,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:41,689 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2020-11-29 19:38:41,689 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:38:41,690 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2020-11-29 19:38:41,690 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-29 19:38:41,690 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-11-29 19:38:41,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2020-11-29 19:38:41,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:38:41,691 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-29 19:38:41,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2020-11-29 19:38:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2020-11-29 19:38:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 19:38:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-29 19:38:41,694 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-29 19:38:41,694 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-29 19:38:41,694 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-29 19:38:41,694 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2020-11-29 19:38:41,695 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:38:41,695 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:38:41,695 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:38:41,696 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2020-11-29 19:38:41,696 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:38:41,696 INFO L794 eck$LassoCheckResult]: Stem: 582#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 583#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 584#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 588#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 596#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 595#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 594#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 593#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 592#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 591#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 590#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 589#L21-2 assume !(main_~x2~0 > 1); 587#L21-3 main_~x1~0 := 1 + main_~x1~0; 585#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 586#L21-2 [2020-11-29 19:38:41,696 INFO L796 eck$LassoCheckResult]: Loop: 586#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 586#L21-2 [2020-11-29 19:38:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2020-11-29 19:38:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:41,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919196379] [2020-11-29 19:38:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,709 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,738 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,741 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:41,744 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-11-29 19:38:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:41,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086545449] [2020-11-29 19:38:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,761 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,763 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,763 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2020-11-29 19:38:41,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:38:41,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45851565] [2020-11-29 19:38:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:38:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:38:41,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:38:41,803 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:38:41,885 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:38:41,886 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:38:41,886 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:38:41,886 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:38:41,886 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:38:41,886 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,886 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:38:41,886 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:38:41,886 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2020-11-29 19:38:41,886 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:38:41,886 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:38:41,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:41,963 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:38:41,963 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:41,990 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:41,990 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:41,995 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:38:41,995 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:42,035 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:38:42,035 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:42,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:38:42,079 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:42,110 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:38:42,111 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:38:42,111 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:38:42,112 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:38:42,112 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:38:42,112 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:38:42,112 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:42,112 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:38:42,112 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:38:42,112 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2020-11-29 19:38:42,112 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:38:42,112 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:38:42,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:42,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:42,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:38:42,209 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:38:42,210 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:42,217 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:38:42,219 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:42,219 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:42,219 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:42,219 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:42,223 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:38:42,223 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:38:42,229 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:42,268 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:38:42,274 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:38:42,274 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:38:42,274 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:38:42,274 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:38:42,274 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:38:42,275 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:38:42,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:38:42,278 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:38:42,281 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 19:38:42,282 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36381ca-764f-4271-9368-9ab793727b95/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:38:42,285 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:38:42,285 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:38:42,285 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:38:42,285 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:38:42,325 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:38:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:38:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:42,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:38:42,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:42,362 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:38:42,362 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 19:38:42,384 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-11-29 19:38:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:38:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:38:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:38:42,387 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-29 19:38:42,387 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:42,387 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:38:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:38:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:42,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:38:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:42,429 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:38:42,429 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 19:38:42,440 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-11-29 19:38:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:38:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:38:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:38:42,441 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-29 19:38:42,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:42,441 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:38:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:38:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:38:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:38:42,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:38:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:38:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:38:42,474 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:38:42,474 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 19:38:42,487 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 18 states and 20 transitions. Complement of second has 4 states. [2020-11-29 19:38:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:38:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:38:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-11-29 19:38:42,488 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-29 19:38:42,489 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:42,489 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2020-11-29 19:38:42,489 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:42,489 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2020-11-29 19:38:42,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:38:42,490 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2020-11-29 19:38:42,491 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:38:42,491 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2020-11-29 19:38:42,491 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 19:38:42,491 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 19:38:42,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 19:38:42,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:38:42,491 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:38:42,491 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:38:42,491 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:38:42,491 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-29 19:38:42,491 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:38:42,492 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:38:42,492 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 19:38:42,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 07:38:42 BoogieIcfgContainer [2020-11-29 19:38:42,503 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 19:38:42,504 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:38:42,504 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:38:42,504 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:38:42,505 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:38:37" (3/4) ... [2020-11-29 19:38:42,508 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:38:42,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:38:42,509 INFO L168 Benchmark]: Toolchain (without parser) took 5855.54 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 72.4 MB in the beginning and 57.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:38:42,510 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:38:42,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.05 ms. Allocated memory is still 100.7 MB. Free memory was 72.4 MB in the beginning and 79.4 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:38:42,519 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.34 ms. Allocated memory is still 100.7 MB. Free memory was 79.4 MB in the beginning and 78.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:38:42,519 INFO L168 Benchmark]: Boogie Preprocessor took 21.07 ms. Allocated memory is still 100.7 MB. Free memory was 78.1 MB in the beginning and 77.4 MB in the end (delta: 719.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:38:42,520 INFO L168 Benchmark]: RCFGBuilder took 272.85 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 68.8 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:38:42,520 INFO L168 Benchmark]: BuchiAutomizer took 5240.48 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 68.8 MB in the beginning and 57.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:38:42,520 INFO L168 Benchmark]: Witness Printer took 4.18 ms. Allocated memory is still 127.9 MB. Free memory is still 57.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:38:42,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.05 ms. Allocated memory is still 100.7 MB. Free memory was 72.4 MB in the beginning and 79.4 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.34 ms. Allocated memory is still 100.7 MB. Free memory was 79.4 MB in the beginning and 78.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.07 ms. Allocated memory is still 100.7 MB. Free memory was 78.1 MB in the beginning and 77.4 MB in the end (delta: 719.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 272.85 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 68.8 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5240.48 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 68.8 MB in the beginning and 57.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.18 ms. Allocated memory is still 127.9 MB. Free memory is still 57.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * x1 + 21 and consists of 3 locations. One deterministic module has affine ranking function x2 and consists of 3 locations. One nondeterministic module has affine ranking function x2 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.1s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 4.2s. Construction of modules took 0.3s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 50 SDs, 0 SdLazy, 157 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf98 lsp42 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 30ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...