./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/a.10.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_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/a.10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 8d0216d6bf8bf4f618f739d27f28d08a28da9c3b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:19:11,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:19:11,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:19:11,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:19:11,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:19:11,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:19:11,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:19:11,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:19:11,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:19:11,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:19:11,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:19:11,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:19:11,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:19:11,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:19:11,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:19:11,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:19:11,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:19:11,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:19:11,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:19:11,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:19:11,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:19:11,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:19:11,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:19:11,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:19:11,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:19:11,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:19:11,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:19:11,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:19:11,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:19:11,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:19:11,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:19:11,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:19:11,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:19:11,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:19:11,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:19:11,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:19:11,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:19:11,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:19:11,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:19:11,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:19:11,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:19:11,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 22:19:11,248 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:19:11,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:19:11,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:19:11,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:19:11,251 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:19:11,251 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 22:19:11,251 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 22:19:11,252 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 22:19:11,252 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 22:19:11,252 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 22:19:11,253 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 22:19:11,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:19:11,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 22:19:11,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:19:11,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:19:11,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 22:19:11,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 22:19:11,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 22:19:11,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:19:11,256 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 22:19:11,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:19:11,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 22:19:11,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:19:11,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:19:11,257 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 22:19:11,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:19:11,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:19:11,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:19:11,258 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 22:19:11,261 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 22:19:11,261 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_a92457bf-ef5e-4223-9799-0d6de1fe1565/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d0216d6bf8bf4f618f739d27f28d08a28da9c3b [2020-11-29 22:19:11,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:19:11,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:19:11,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:19:11,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:19:11,609 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:19:11,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/a.10.c [2020-11-29 22:19:11,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/data/44c604f0d/0864232e11c14e3baf250edc8c9df0fd/FLAG04bcb4d94 [2020-11-29 22:19:12,339 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:19:12,340 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/sv-benchmarks/c/termination-restricted-15/a.10.c [2020-11-29 22:19:12,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/data/44c604f0d/0864232e11c14e3baf250edc8c9df0fd/FLAG04bcb4d94 [2020-11-29 22:19:12,736 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/data/44c604f0d/0864232e11c14e3baf250edc8c9df0fd [2020-11-29 22:19:12,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:19:12,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:19:12,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:19:12,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:19:12,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:19:12,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:12,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c92fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12, skipping insertion in model container [2020-11-29 22:19:12,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:12,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:19:12,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:19:12,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:19:12,944 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:19:12,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:19:12,997 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:19:12,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12 WrapperNode [2020-11-29 22:19:12,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:19:12,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:19:12,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:19:12,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:19:13,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:19:13,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:19:13,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:19:13,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:19:13,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... [2020-11-29 22:19:13,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:19:13,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:19:13,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:19:13,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:19:13,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:13,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:19:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:19:13,304 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:19:13,305 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 22:19:13,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:19:13 BoogieIcfgContainer [2020-11-29 22:19:13,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:19:13,307 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 22:19:13,307 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 22:19:13,311 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 22:19:13,311 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:19:13,311 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 10:19:12" (1/3) ... [2020-11-29 22:19:13,313 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@586286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:19:13, skipping insertion in model container [2020-11-29 22:19:13,313 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:19:13,313 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:19:12" (2/3) ... [2020-11-29 22:19:13,314 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@586286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:19:13, skipping insertion in model container [2020-11-29 22:19:13,314 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:19:13,314 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:19:13" (3/3) ... [2020-11-29 22:19:13,315 INFO L373 chiAutomizerObserver]: Analyzing ICFG a.10.c [2020-11-29 22:19:13,359 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 22:19:13,359 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 22:19:13,359 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 22:19:13,359 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:19:13,359 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:19:13,359 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 22:19:13,359 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:19:13,360 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 22:19:13,373 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-11-29 22:19:13,391 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:13,391 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:19:13,391 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:19:13,397 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:19:13,397 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-29 22:19:13,397 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 22:19:13,397 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-11-29 22:19:13,398 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:13,398 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:19:13,399 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:19:13,399 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:19:13,399 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-29 22:19:13,406 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 3#L12-2true [2020-11-29 22:19:13,407 INFO L796 eck$LassoCheckResult]: Loop: 3#L12-2true assume !!!(main_~x~0 == main_~y~0); 5#L12true assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 3#L12-2true [2020-11-29 22:19:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 22:19:13,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:13,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14784416] [2020-11-29 22:19:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:13,500 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:13,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:13,521 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-11-29 22:19:13,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:13,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024693848] [2020-11-29 22:19:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:13,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:13,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:13,544 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-11-29 22:19:13,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:13,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146865699] [2020-11-29 22:19:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:13,556 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:13,562 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:13,564 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:13,703 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2020-11-29 22:19:13,776 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:13,778 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:13,778 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:13,778 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:13,778 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:19:13,778 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:13,779 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:13,779 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:13,779 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2020-11-29 22:19:13,779 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:13,779 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:13,798 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 22:19:13,816 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 22:19:13,822 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 22:19:13,946 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:13,948 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:13,956 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:13,957 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:19:13,967 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:19:13,967 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_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:14,006 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:19:14,010 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:19:14,011 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_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,047 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:14,047 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:19:14,079 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:19:14,297 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:19:14,299 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:14,299 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:14,299 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:14,299 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:14,299 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:19:14,300 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,300 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:14,300 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:14,300 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2020-11-29 22:19:14,300 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:14,300 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:14,303 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 22:19:14,331 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 22:19:14,338 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 22:19:14,499 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:14,503 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:19:14,530 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 22:19:14,532 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:19:14,533 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:19:14,533 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:19:14,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:19:14,547 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:19:14,547 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,560 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:19:14,598 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 22:19:14,600 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:19:14,600 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:19:14,600 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:19:14,600 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:19:14,605 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:19:14,605 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,618 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,647 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 22:19:14,649 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:19:14,649 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:19:14,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:19:14,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:19:14,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:19:14,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:19:14,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:19:14,655 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:19:14,662 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-29 22:19:14,662 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:14,666 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:19:14,666 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:19:14,666 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:19:14,667 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2020-11-29 22:19:14,696 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:19:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:19:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:14,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:19:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:14,796 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 22:19:14,814 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 22:19:14,816 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2020-11-29 22:19:14,873 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 23 states and 30 transitions. Complement of second has 6 states. [2020-11-29 22:19:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 22:19:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 22:19:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-29 22:19:14,879 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2020-11-29 22:19:14,880 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:14,880 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2020-11-29 22:19:14,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:14,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2020-11-29 22:19:14,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:14,882 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2020-11-29 22:19:14,886 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:14,890 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2020-11-29 22:19:14,892 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-11-29 22:19:14,892 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-11-29 22:19:14,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-11-29 22:19:14,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:19:14,893 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-29 22:19:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-11-29 22:19:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 22:19:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 22:19:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-11-29 22:19:14,925 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-29 22:19:14,925 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-29 22:19:14,925 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 22:19:14,926 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-11-29 22:19:14,926 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:14,926 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:19:14,927 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:19:14,927 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 22:19:14,927 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-29 22:19:14,927 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 69#L12-2 assume !!!(main_~x~0 == main_~y~0); 67#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 63#L12-2 [2020-11-29 22:19:14,927 INFO L796 eck$LassoCheckResult]: Loop: 63#L12-2 assume !!!(main_~x~0 == main_~y~0); 64#L12 assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 63#L12-2 [2020-11-29 22:19:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-11-29 22:19:14,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:14,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19980132] [2020-11-29 22:19:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:14,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:14,943 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:14,945 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2020-11-29 22:19:14,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:14,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901326533] [2020-11-29 22:19:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:14,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:14,959 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:14,960 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2020-11-29 22:19:14,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:14,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198542307] [2020-11-29 22:19:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:19:15,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198542307] [2020-11-29 22:19:15,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153300406] [2020-11-29 22:19:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:19:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:15,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:19:15,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:19:15,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:19:15,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-11-29 22:19:15,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779291717] [2020-11-29 22:19:15,147 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:15,147 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:15,147 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:15,147 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:15,147 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:19:15,147 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:15,147 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:15,147 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:15,147 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2020-11-29 22:19:15,148 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:15,148 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:15,149 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 22:19:15,172 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 22:19:15,184 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 22:19:15,280 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:15,281 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:15,319 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:15,319 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:19:15,322 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:19:15,322 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_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:15,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:15,398 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:19:15,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:19:15,443 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:15,594 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:19:15,596 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:15,596 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:15,596 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:15,596 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:15,597 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:19:15,597 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:15,597 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:15,597 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:15,597 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2020-11-29 22:19:15,597 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:15,597 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:15,598 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 22:19:15,617 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 22:19:15,621 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 22:19:15,669 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:15,669 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:19:15,684 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 22:19:15,686 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:19:15,687 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:19:15,687 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:19:15,687 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:19:15,687 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:19:15,691 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:19:15,691 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:15,695 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:19:15,702 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:19:15,702 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:15,711 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:19:15,711 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:19:15,711 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:19:15,711 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:15,751 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:19:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:19:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:15,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:19:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:15,791 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 22:19:15,792 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 22:19:15,792 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-29 22:19:15,809 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 11 states and 16 transitions. Complement of second has 5 states. [2020-11-29 22:19:15,811 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 22:19:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 22:19:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-29 22:19:15,812 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2020-11-29 22:19:15,812 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:15,813 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2020-11-29 22:19:15,813 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:15,813 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-29 22:19:15,813 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:15,813 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2020-11-29 22:19:15,815 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:15,815 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2020-11-29 22:19:15,815 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-29 22:19:15,816 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 22:19:15,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2020-11-29 22:19:15,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:19:15,816 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-11-29 22:19:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2020-11-29 22:19:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 22:19:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 22:19:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2020-11-29 22:19:15,818 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-11-29 22:19:15,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:19:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:19:15,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:19:15,826 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2020-11-29 22:19:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:19:15,861 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2020-11-29 22:19:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:19:15,862 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2020-11-29 22:19:15,863 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:15,863 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2020-11-29 22:19:15,863 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-29 22:19:15,863 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 22:19:15,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2020-11-29 22:19:15,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:19:15,864 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-11-29 22:19:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2020-11-29 22:19:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2020-11-29 22:19:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 22:19:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2020-11-29 22:19:15,865 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-29 22:19:15,866 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-29 22:19:15,866 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 22:19:15,866 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2020-11-29 22:19:15,866 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:15,866 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:19:15,866 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:19:15,867 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 22:19:15,867 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-29 22:19:15,867 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 158#L12-2 assume !!!(main_~x~0 == main_~y~0); 154#L12 [2020-11-29 22:19:15,867 INFO L796 eck$LassoCheckResult]: Loop: 154#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 153#L12-2 assume !!!(main_~x~0 == main_~y~0); 154#L12 [2020-11-29 22:19:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 22:19:15,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:15,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703129542] [2020-11-29 22:19:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:15,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:15,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:15,886 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2020-11-29 22:19:15,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:15,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309063496] [2020-11-29 22:19:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:15,898 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:15,917 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:15,918 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2020-11-29 22:19:15,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:15,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432739084] [2020-11-29 22:19:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:15,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:15,931 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:15,933 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:15,960 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:15,960 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:15,960 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:15,960 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:15,960 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:19:15,961 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:15,961 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:15,961 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:15,961 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2020-11-29 22:19:15,961 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:15,961 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:15,963 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 22:19:15,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:19:15,992 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 22:19:16,105 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:16,106 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:16,113 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:16,113 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:16,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:19:16,173 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:18,794 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:19:18,797 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:18,797 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:18,797 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:18,797 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:18,797 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:19:18,797 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:18,797 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:18,797 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:18,797 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2020-11-29 22:19:18,797 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:18,797 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:18,799 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 22:19:18,808 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 22:19:18,834 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 22:19:18,983 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2020-11-29 22:19:18,998 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:18,998 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:19:19,015 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 22:19:19,018 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:19:19,018 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:19:19,018 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:19:19,018 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 22:19:19,018 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:19,024 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 22:19:19,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:19:19,032 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:19:19,045 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:19:19,045 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:19:19,057 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:19:19,057 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:19:19,057 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:19:19,058 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~y~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:19,100 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:19:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:19,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:19:19,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:19,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:19:19,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:19,184 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 22:19:19,184 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 22:19:19,185 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-11-29 22:19:19,203 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 11 states and 13 transitions. Complement of second has 5 states. [2020-11-29 22:19:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 22:19:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 22:19:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 22:19:19,205 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-29 22:19:19,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:19,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-29 22:19:19,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:19,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2020-11-29 22:19:19,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:19,206 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2020-11-29 22:19:19,207 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:19,208 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2020-11-29 22:19:19,208 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-11-29 22:19:19,208 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-11-29 22:19:19,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-11-29 22:19:19,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:19:19,209 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 22:19:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-11-29 22:19:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2020-11-29 22:19:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 22:19:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-11-29 22:19:19,210 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 22:19:19,210 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 22:19:19,210 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 22:19:19,210 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-11-29 22:19:19,211 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-29 22:19:19,211 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:19:19,211 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:19:19,211 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2020-11-29 22:19:19,211 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-29 22:19:19,212 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 203#L12-2 assume !!!(main_~x~0 == main_~y~0); 204#L12 assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 205#L12-2 assume !!!(main_~x~0 == main_~y~0); 206#L12 [2020-11-29 22:19:19,212 INFO L796 eck$LassoCheckResult]: Loop: 206#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 208#L12-2 assume !!!(main_~x~0 == main_~y~0); 206#L12 [2020-11-29 22:19:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2020-11-29 22:19:19,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:19,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029607198] [2020-11-29 22:19:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:19,219 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:19,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:19,225 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2020-11-29 22:19:19,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:19,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872395103] [2020-11-29 22:19:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:19,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:19:19,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:19:19,248 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:19:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2020-11-29 22:19:19,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:19:19,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132208306] [2020-11-29 22:19:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:19:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:19:19,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132208306] [2020-11-29 22:19:19,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:19:19,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:19:19,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555997773] [2020-11-29 22:19:19,356 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:19,356 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:19,356 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:19,356 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:19,356 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:19:19,357 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:19,357 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:19,357 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:19,357 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2020-11-29 22:19:19,357 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:19,357 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:19,358 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 22:19:19,364 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 22:19:19,379 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 22:19:19,498 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:19,498 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:19,521 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:19,521 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:19,527 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:19:19,527 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:19,576 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:19:19,576 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:19,630 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:19:19,630 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:22,364 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:19:22,367 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:19:22,368 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:19:22,368 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:19:22,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:19:22,368 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:19:22,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:22,368 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:19:22,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:19:22,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2020-11-29 22:19:22,368 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:19:22,368 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:19:22,369 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 22:19:22,374 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 22:19:22,396 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 22:19:22,506 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:19:22,506 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:22,542 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 22:19:22,544 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:19:22,544 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:19:22,545 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:19:22,545 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:22,550 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:19:22,551 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:19:22,555 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:22,604 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 22:19:22,606 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:19:22,606 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:19:22,606 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:19:22,606 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 22:19:22,606 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:19:22,616 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 22:19:22,616 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:22,622 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:19:22,627 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:19:22,627 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a92457bf-ef5e-4223-9799-0d6de1fe1565/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 22:19:22,630 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:19:22,631 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:19:22,631 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:19:22,631 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~y~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:19:22,674 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:19:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:19:22,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:22,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:19:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:22,765 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 22:19:22,766 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 22:19:22,766 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-11-29 22:19:22,777 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-11-29 22:19:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-11-29 22:19:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 22:19:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-11-29 22:19:22,778 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-29 22:19:22,778 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:22,778 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 22:19:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:19:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:22,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:19:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:22,948 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 22:19:22,949 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-29 22:19:22,949 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-11-29 22:19:22,957 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-11-29 22:19:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-11-29 22:19:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 22:19:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-11-29 22:19:22,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-29 22:19:22,958 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:22,959 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 22:19:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:19:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:19:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:19:22,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:19:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:19:23,021 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 22:19:23,022 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 2 loop predicates [2020-11-29 22:19:23,022 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-11-29 22:19:23,036 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 8 states and 9 transitions. Complement of second has 4 states. [2020-11-29 22:19:23,037 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 22:19:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 22:19:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-11-29 22:19:23,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-29 22:19:23,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:23,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2020-11-29 22:19:23,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:23,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-29 22:19:23,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:19:23,039 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-11-29 22:19:23,040 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 22:19:23,040 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2020-11-29 22:19:23,040 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 22:19:23,040 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 22:19:23,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 22:19:23,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 22:19:23,040 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:19:23,040 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:19:23,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:19:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:19:23,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:19:23,041 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2020-11-29 22:19:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:19:23,042 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-29 22:19:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:19:23,042 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-29 22:19:23,044 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 22:19:23,044 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:19:23,044 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 22:19:23,044 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 22:19:23,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 22:19:23,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 22:19:23,045 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:19:23,045 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:19:23,045 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:19:23,045 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 22:19:23,045 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:19:23,045 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 22:19:23,045 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 22:19:23,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 10:19:23 BoogieIcfgContainer [2020-11-29 22:19:23,051 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 22:19:23,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:19:23,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:19:23,054 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:19:23,055 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:19:13" (3/4) ... [2020-11-29 22:19:23,058 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 22:19:23,058 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:19:23,060 INFO L168 Benchmark]: Toolchain (without parser) took 10317.32 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 65.5 MB in the beginning and 86.6 MB in the end (delta: -21.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:19:23,060 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 51.3 MB in the beginning and 51.3 MB in the end (delta: 34.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:19:23,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.89 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 73.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-11-29 22:19:23,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.94 ms. Allocated memory is still 94.4 MB. Free memory was 73.7 MB in the beginning and 72.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:19:23,067 INFO L168 Benchmark]: Boogie Preprocessor took 19.45 ms. Allocated memory is still 94.4 MB. Free memory was 72.4 MB in the beginning and 71.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:19:23,069 INFO L168 Benchmark]: RCFGBuilder took 227.57 ms. Allocated memory is still 94.4 MB. Free memory was 71.4 MB in the beginning and 63.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:19:23,069 INFO L168 Benchmark]: BuchiAutomizer took 9744.37 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 63.3 MB in the beginning and 86.6 MB in the end (delta: -23.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-11-29 22:19:23,070 INFO L168 Benchmark]: Witness Printer took 3.85 ms. Allocated memory is still 123.7 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:19:23,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 51.3 MB in the beginning and 51.3 MB in the end (delta: 34.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.89 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 73.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.94 ms. Allocated memory is still 94.4 MB. Free memory was 73.7 MB in the beginning and 72.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.45 ms. Allocated memory is still 94.4 MB. Free memory was 72.4 MB in the beginning and 71.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 227.57 ms. Allocated memory is still 94.4 MB. Free memory was 71.4 MB in the beginning and 63.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 9744.37 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 63.3 MB in the beginning and 86.6 MB in the end (delta: -23.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.85 ms. Allocated memory is still 123.7 MB. Free memory is still 86.6 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 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x + -1 * y and consists of 4 locations. One deterministic module has affine ranking function -1 * y + x and consists of 3 locations. One deterministic module has affine ranking function 2 * y + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * y + -2 * x + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.6s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 8.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 47ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...