./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Flip2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Flip2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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 cda310f9ec541637625c4cf2e3662e22b6979f61 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:02:41,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:02:41,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:02:41,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:02:41,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:02:41,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:02:41,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:02:41,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:02:41,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:02:41,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:02:41,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:02:41,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:02:41,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:02:41,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:02:41,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:02:41,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:02:41,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:02:41,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:02:41,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:02:41,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:02:41,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:02:41,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:02:41,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:02:41,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:02:41,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:02:41,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:02:41,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:02:41,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:02:41,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:02:41,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:02:41,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:02:41,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:02:41,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:02:41,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:02:41,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:02:41,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:02:41,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:02:41,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:02:41,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:02:41,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:02:41,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:02:41,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-10-22 09:02:41,920 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:02:41,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:02:41,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:02:41,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:02:41,922 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:02:41,922 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 09:02:41,922 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 09:02:41,923 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 09:02:41,923 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 09:02:41,923 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 09:02:41,923 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 09:02:41,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:02:41,923 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:02:41,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:02:41,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:02:41,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 09:02:41,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 09:02:41,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 09:02:41,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:02:41,924 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 09:02:41,925 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:02:41,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 09:02:41,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:02:41,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:02:41,925 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 09:02:41,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:02:41,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:02:41,926 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 09:02:41,927 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 09:02:41,927 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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 -> cda310f9ec541637625c4cf2e3662e22b6979f61 [2019-10-22 09:02:41,950 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:02:41,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:02:41,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:02:41,964 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:02:41,964 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:02:41,964 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-10-22 09:02:42,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/data/a49f7ff76/2839a2e0fad349d59efe55f253ed44d5/FLAG331077da3 [2019-10-22 09:02:42,379 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:02:42,380 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-10-22 09:02:42,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/data/a49f7ff76/2839a2e0fad349d59efe55f253ed44d5/FLAG331077da3 [2019-10-22 09:02:42,800 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/data/a49f7ff76/2839a2e0fad349d59efe55f253ed44d5 [2019-10-22 09:02:42,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:02:42,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:02:42,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:42,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:02:42,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:02:42,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:42" (1/1) ... [2019-10-22 09:02:42,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70838e59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:42, skipping insertion in model container [2019-10-22 09:02:42,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:42" (1/1) ... [2019-10-22 09:02:42,821 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:02:42,835 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:02:42,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:42,963 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:02:43,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:43,072 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:02:43,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43 WrapperNode [2019-10-22 09:02:43,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:43,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:43,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:02:43,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:02:43,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:43,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:02:43,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:02:43,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:02:43,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... [2019-10-22 09:02:43,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:02:43,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:02:43,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:02:43,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:02:43,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:02:43,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:02:43,289 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:02:43,290 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-22 09:02:43,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:43 BoogieIcfgContainer [2019-10-22 09:02:43,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:02:43,292 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 09:02:43,292 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 09:02:43,295 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 09:02:43,296 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:02:43,296 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 09:02:42" (1/3) ... [2019-10-22 09:02:43,297 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1ccc2928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:02:43, skipping insertion in model container [2019-10-22 09:02:43,297 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:02:43,297 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:43" (2/3) ... [2019-10-22 09:02:43,297 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1ccc2928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:02:43, skipping insertion in model container [2019-10-22 09:02:43,298 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:02:43,298 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:43" (3/3) ... [2019-10-22 09:02:43,299 INFO L371 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2019-10-22 09:02:43,342 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 09:02:43,342 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 09:02:43,342 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 09:02:43,342 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:02:43,342 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:02:43,342 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 09:02:43,342 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:02:43,342 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 09:02:43,355 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-10-22 09:02:43,373 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-10-22 09:02:43,373 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:02:43,373 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:02:43,380 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-10-22 09:02:43,380 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 09:02:43,380 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 09:02:43,380 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-10-22 09:02:43,381 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-10-22 09:02:43,381 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:02:43,381 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:02:43,381 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-10-22 09:02:43,381 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 09:02:43,388 INFO L791 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 6#L19-2true [2019-10-22 09:02:43,388 INFO L793 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~i~0 > 0 && main_~j~0 > 0); 10#L14true assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 6#L19-2true [2019-10-22 09:02:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-10-22 09:02:43,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:43,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333499166] [2019-10-22 09:02:43,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:43,492 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-10-22 09:02:43,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:43,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805700986] [2019-10-22 09:02:43,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:43,521 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:43,526 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-10-22 09:02:43,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:43,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258677915] [2019-10-22 09:02:43,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:43,538 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:43,620 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:43,620 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:43,620 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:43,621 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:43,621 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:02:43,621 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:43,621 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:43,621 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:43,621 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-10-22 09:02:43,621 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:43,622 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:43,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:43,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:43,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:43,773 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:43,774 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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 [2019-10-22 09:02:43,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:43,784 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:02:43,795 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:02:43,796 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/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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 [2019-10-22 09:02:43,805 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:43,805 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:02:43,809 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:02:43,810 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/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:02:43,820 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:43,820 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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 [2019-10-22 09:02:43,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:02:43,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:02:44,051 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:02:44,052 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:44,053 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:44,053 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:44,053 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:44,053 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:02:44,053 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,053 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:44,053 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:44,053 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-10-22 09:02:44,053 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:44,054 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:44,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,142 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:44,146 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:02:44,148 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:44,149 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:44,150 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:44,150 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:44,151 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:44,154 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:02:44,155 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:02:44,170 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:02:44,171 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:44,172 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:44,172 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:44,172 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:44,172 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:44,174 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:02:44,178 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:02:44,196 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:02:44,196 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:44,197 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:44,197 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:02:44,198 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:44,198 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:44,198 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:44,199 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:02:44,199 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:02:44,215 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:02:44,233 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:02:44,233 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:02:44,239 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:02:44,239 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:02:44,239 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:02:44,240 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2019-10-22 09:02:44,242 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:02:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:02:44,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,291 WARN L254 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:44,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:44,325 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 [2019-10-22 09:02:44,326 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-10-22 09:02:44,372 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 30 states and 43 transitions. Complement of second has 8 states. [2019-10-22 09:02:44,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-10-22 09:02:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 09:02:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2019-10-22 09:02:44,376 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 2 letters. [2019-10-22 09:02:44,376 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:44,376 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2019-10-22 09:02:44,376 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:44,376 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 4 letters. [2019-10-22 09:02:44,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:44,377 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 43 transitions. [2019-10-22 09:02:44,380 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-10-22 09:02:44,383 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 19 transitions. [2019-10-22 09:02:44,384 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-10-22 09:02:44,385 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-10-22 09:02:44,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-10-22 09:02:44,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:02:44,385 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-10-22 09:02:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-10-22 09:02:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-10-22 09:02:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 09:02:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2019-10-22 09:02:44,408 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-10-22 09:02:44,409 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-10-22 09:02:44,409 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 09:02:44,409 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2019-10-22 09:02:44,409 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-10-22 09:02:44,409 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:02:44,409 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:02:44,410 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-10-22 09:02:44,410 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:02:44,410 INFO L791 eck$LassoCheckResult]: Stem: 75#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 76#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 78#L14 [2019-10-22 09:02:44,410 INFO L793 eck$LassoCheckResult]: Loop: 78#L14 assume !(main_~i~0 < main_~j~0); 84#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 77#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 78#L14 [2019-10-22 09:02:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-10-22 09:02:44,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:44,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015169289] [2019-10-22 09:02:44,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,419 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2019-10-22 09:02:44,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:44,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856621532] [2019-10-22 09:02:44,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,427 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 29865627, now seen corresponding path program 1 times [2019-10-22 09:02:44,427 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:44,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730853378] [2019-10-22 09:02:44,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,437 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:44,467 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:44,467 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:44,468 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:44,468 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:44,468 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:02:44,468 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,468 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:44,468 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:44,468 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-10-22 09:02:44,468 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:44,468 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:44,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,521 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:44,521 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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) [2019-10-22 09:02:44,531 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:44,532 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,537 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:02:44,537 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/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:02:44,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:44,544 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,549 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:02:44,549 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:02:44,557 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:44,557 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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 [2019-10-22 09:02:44,570 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:02:44,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:02:44,649 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:02:44,652 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:44,652 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:44,652 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:44,652 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:44,652 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:02:44,652 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,652 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:44,652 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:44,652 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-10-22 09:02:44,653 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:44,653 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:44,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,703 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:44,704 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:02:44,704 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:44,705 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:44,705 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:44,705 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:44,705 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:44,707 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:02:44,707 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:02:44,710 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:02:44,711 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:44,711 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:44,712 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:44,712 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:44,712 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:44,713 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:02:44,713 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:02:44,718 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:02:44,718 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:44,719 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:44,719 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:02:44,719 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:44,719 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:44,720 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:44,720 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:02:44,720 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:02:44,725 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:02:44,728 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:02:44,729 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:02:44,729 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:02:44,729 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:02:44,729 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:02:44,729 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-10-22 09:02:44,730 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:02:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:02:44,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,750 WARN L254 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:02:44,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:44,768 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 [2019-10-22 09:02:44,768 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-10-22 09:02:44,803 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9. Second operand 4 states. Result 34 states and 49 transitions. Complement of second has 7 states. [2019-10-22 09:02:44,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-10-22 09:02:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 09:02:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-10-22 09:02:44,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 3 letters. [2019-10-22 09:02:44,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:44,807 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 3 letters. [2019-10-22 09:02:44,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:44,807 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 6 letters. [2019-10-22 09:02:44,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:44,807 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 49 transitions. [2019-10-22 09:02:44,809 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-10-22 09:02:44,809 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 30 states and 44 transitions. [2019-10-22 09:02:44,810 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-10-22 09:02:44,810 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-10-22 09:02:44,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2019-10-22 09:02:44,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:02:44,812 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2019-10-22 09:02:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2019-10-22 09:02:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-10-22 09:02:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:02:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2019-10-22 09:02:44,816 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-10-22 09:02:44,816 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-10-22 09:02:44,816 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 09:02:44,816 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 37 transitions. [2019-10-22 09:02:44,817 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-10-22 09:02:44,817 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:02:44,817 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:02:44,817 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 09:02:44,817 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:02:44,817 INFO L791 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 161#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 173#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2019-10-22 09:02:44,817 INFO L793 eck$LassoCheckResult]: Loop: 166#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 167#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 179#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2019-10-22 09:02:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-10-22 09:02:44,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:44,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006180086] [2019-10-22 09:02:44,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,838 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,840 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2019-10-22 09:02:44,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:44,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798321502] [2019-10-22 09:02:44,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,846 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,846 INFO L82 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2019-10-22 09:02:44,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:44,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449834944] [2019-10-22 09:02:44,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:44,856 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:44,873 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:44,873 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:44,873 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:44,873 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:44,873 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:02:44,873 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,873 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:44,873 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:44,873 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-10-22 09:02:44,873 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:44,874 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:44,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:44,920 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:44,920 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:02:44,925 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:44,926 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,934 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:02:44,935 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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) [2019-10-22 09:02:44,943 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:44,943 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:44,950 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:02:44,950 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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) [2019-10-22 09:02:44,957 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:44,958 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:02:44,971 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:02:44,972 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:45,163 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:02:45,165 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:45,165 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:45,165 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:45,165 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:45,165 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:02:45,166 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:45,166 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:45,166 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:45,166 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-10-22 09:02:45,166 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:45,166 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:45,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:45,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:45,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:45,215 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:45,215 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:02:45,216 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:45,216 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:45,217 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:45,217 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:45,217 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:45,221 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:02:45,222 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:02:45,226 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:02:45,229 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:45,230 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:45,230 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:02:45,230 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:45,230 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:45,231 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:45,231 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:02:45,231 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:02:45,240 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:02:45,245 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-10-22 09:02:45,249 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:02:45,250 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:02:45,250 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:02:45,250 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:02:45,250 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~i~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2019-10-22 09:02:45,251 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:02:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:02:45,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,290 WARN L254 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:02:45,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:45,304 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 [2019-10-22 09:02:45,304 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19 Second operand 3 states. [2019-10-22 09:02:45,328 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19. Second operand 3 states. Result 62 states and 91 transitions. Complement of second has 5 states. [2019-10-22 09:02:45,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 09:02:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 09:02:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-10-22 09:02:45,330 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-10-22 09:02:45,330 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:45,331 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-10-22 09:02:45,331 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:45,331 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-10-22 09:02:45,331 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:45,331 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 91 transitions. [2019-10-22 09:02:45,333 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-10-22 09:02:45,337 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 55 states and 80 transitions. [2019-10-22 09:02:45,338 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-10-22 09:02:45,338 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2019-10-22 09:02:45,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 80 transitions. [2019-10-22 09:02:45,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:02:45,338 INFO L688 BuchiCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-10-22 09:02:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 80 transitions. [2019-10-22 09:02:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-10-22 09:02:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 09:02:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2019-10-22 09:02:45,344 INFO L711 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-10-22 09:02:45,344 INFO L591 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-10-22 09:02:45,344 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 09:02:45,345 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 60 transitions. [2019-10-22 09:02:45,346 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-10-22 09:02:45,349 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:02:45,351 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:02:45,351 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-10-22 09:02:45,352 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 09:02:45,352 INFO L791 eck$LassoCheckResult]: Stem: 285#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 286#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 316#L14 assume !(main_~i~0 < main_~j~0); 291#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 292#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 304#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2019-10-22 09:02:45,352 INFO L793 eck$LassoCheckResult]: Loop: 299#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 309#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2019-10-22 09:02:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2019-10-22 09:02:45,352 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:45,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499320293] [2019-10-22 09:02:45,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:45,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:45,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:45,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499320293] [2019-10-22 09:02:45,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:45,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:02:45,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367112817] [2019-10-22 09:02:45,400 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:02:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:45,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-10-22 09:02:45,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:45,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46374257] [2019-10-22 09:02:45,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:45,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:45,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:45,415 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:45,445 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:45,445 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:45,445 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:45,445 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:45,445 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:02:45,445 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:45,445 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:45,445 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:45,446 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-10-22 09:02:45,446 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:45,446 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:45,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:45,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:45,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:45,511 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:45,511 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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) [2019-10-22 09:02:45,519 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:45,520 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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) [2019-10-22 09:02:45,535 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:02:45,535 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:46,356 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:02:46,358 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:46,358 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:46,358 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:46,358 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:46,358 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:02:46,358 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:46,358 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:46,358 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:46,359 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-10-22 09:02:46,359 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:46,359 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:46,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,437 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:46,437 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:02:46,438 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:46,438 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:46,438 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:02:46,439 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:46,439 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:46,439 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:46,439 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:02:46,440 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:02:46,445 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:02:46,450 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:02:46,450 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:02:46,451 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:02:46,451 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:02:46,451 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:02:46,451 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2019-10-22 09:02:46,452 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:02:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:02:46,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,495 WARN L254 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:46,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:46,504 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 [2019-10-22 09:02:46,504 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29 Second operand 3 states. [2019-10-22 09:02:46,521 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29. Second operand 3 states. Result 73 states and 104 transitions. Complement of second has 7 states. [2019-10-22 09:02:46,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-10-22 09:02:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 09:02:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-10-22 09:02:46,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2019-10-22 09:02:46,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:46,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2019-10-22 09:02:46,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:46,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2019-10-22 09:02:46,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:46,524 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 104 transitions. [2019-10-22 09:02:46,526 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2019-10-22 09:02:46,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 57 states and 83 transitions. [2019-10-22 09:02:46,527 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-10-22 09:02:46,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-10-22 09:02:46,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 83 transitions. [2019-10-22 09:02:46,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:02:46,527 INFO L688 BuchiCegarLoop]: Abstraction has 57 states and 83 transitions. [2019-10-22 09:02:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 83 transitions. [2019-10-22 09:02:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-10-22 09:02:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 09:02:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 62 transitions. [2019-10-22 09:02:46,531 INFO L711 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2019-10-22 09:02:46,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:02:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:02:46,535 INFO L87 Difference]: Start difference. First operand 42 states and 62 transitions. Second operand 3 states. [2019-10-22 09:02:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:46,552 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-10-22 09:02:46,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:02:46,553 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 69 transitions. [2019-10-22 09:02:46,554 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-10-22 09:02:46,555 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 46 states and 63 transitions. [2019-10-22 09:02:46,555 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-10-22 09:02:46,555 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2019-10-22 09:02:46,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 63 transitions. [2019-10-22 09:02:46,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:02:46,555 INFO L688 BuchiCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-10-22 09:02:46,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 63 transitions. [2019-10-22 09:02:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-10-22 09:02:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 09:02:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2019-10-22 09:02:46,558 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-10-22 09:02:46,558 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-10-22 09:02:46,558 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-10-22 09:02:46,558 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 61 transitions. [2019-10-22 09:02:46,559 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-10-22 09:02:46,559 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:02:46,559 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:02:46,559 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-10-22 09:02:46,559 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:02:46,560 INFO L791 eck$LassoCheckResult]: Stem: 539#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 540#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 567#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 568#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 570#L14 assume !(main_~i~0 < main_~j~0); 581#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 541#L19-2 [2019-10-22 09:02:46,560 INFO L793 eck$LassoCheckResult]: Loop: 541#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 542#L14 assume !(main_~i~0 < main_~j~0); 545#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 541#L19-2 [2019-10-22 09:02:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash 925765420, now seen corresponding path program 1 times [2019-10-22 09:02:46,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:46,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892534680] [2019-10-22 09:02:46,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:46,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892534680] [2019-10-22 09:02:46,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:46,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:02:46,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203971748] [2019-10-22 09:02:46,580 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:02:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,580 INFO L82 PathProgramCache]: Analyzing trace with hash 39886, now seen corresponding path program 2 times [2019-10-22 09:02:46,580 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:46,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251196442] [2019-10-22 09:02:46,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,585 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:46,614 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:46,614 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:46,614 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:46,614 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:46,615 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:02:46,615 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:46,615 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:46,615 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:46,615 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-10-22 09:02:46,615 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:46,615 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:46,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,657 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:46,657 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/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) [2019-10-22 09:02:46,667 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:02:46,667 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:46,677 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:02:46,677 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:02:46,690 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:02:46,693 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:02:46,693 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:02:46,693 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:02:46,693 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:02:46,693 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:02:46,693 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:02:46,693 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:02:46,693 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:02:46,693 INFO L131 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-10-22 09:02:46,693 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:02:46,693 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:02:46,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:02:46,735 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:02:46,735 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:02:46,736 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:46,736 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:46,737 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:46,737 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:46,737 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:46,738 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:02:46,738 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:02:46,740 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:02:46,740 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:02:46,741 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:02:46,741 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:02:46,741 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:02:46,741 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:02:46,741 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:02:46,742 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:02:46,742 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:02:46,745 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:02:46,749 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:02:46,749 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:02:46,750 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:02:46,750 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:02:46,750 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:02:46,750 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-10-22 09:02:46,750 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:02:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:02:46,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,770 WARN L254 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:02:46,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:46,779 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 [2019-10-22 09:02:46,779 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26 Second operand 3 states. [2019-10-22 09:02:46,794 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26. Second operand 3 states. Result 81 states and 106 transitions. Complement of second has 5 states. [2019-10-22 09:02:46,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 09:02:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 09:02:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-10-22 09:02:46,795 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-10-22 09:02:46,795 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:46,795 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 9 letters. Loop has 3 letters. [2019-10-22 09:02:46,796 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:46,796 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 6 letters. [2019-10-22 09:02:46,796 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:02:46,796 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 106 transitions. [2019-10-22 09:02:46,801 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-10-22 09:02:46,801 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 60 states and 81 transitions. [2019-10-22 09:02:46,802 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-10-22 09:02:46,802 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2019-10-22 09:02:46,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 81 transitions. [2019-10-22 09:02:46,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:02:46,802 INFO L688 BuchiCegarLoop]: Abstraction has 60 states and 81 transitions. [2019-10-22 09:02:46,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 81 transitions. [2019-10-22 09:02:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-10-22 09:02:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 09:02:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2019-10-22 09:02:46,807 INFO L711 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2019-10-22 09:02:46,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:46,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:02:46,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:02:46,807 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 3 states. [2019-10-22 09:02:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:46,823 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-10-22 09:02:46,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:02:46,824 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 67 transitions. [2019-10-22 09:02:46,824 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-10-22 09:02:46,825 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 49 states and 62 transitions. [2019-10-22 09:02:46,825 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-10-22 09:02:46,825 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-10-22 09:02:46,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 62 transitions. [2019-10-22 09:02:46,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:02:46,825 INFO L688 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-10-22 09:02:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 62 transitions. [2019-10-22 09:02:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2019-10-22 09:02:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-22 09:02:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-10-22 09:02:46,828 INFO L711 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-10-22 09:02:46,828 INFO L591 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-10-22 09:02:46,828 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-10-22 09:02:46,828 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2019-10-22 09:02:46,829 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-10-22 09:02:46,829 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:02:46,829 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:02:46,829 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-10-22 09:02:46,829 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2019-10-22 09:02:46,829 INFO L791 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 815#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 835#L14 assume !(main_~i~0 < main_~j~0); 823#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 824#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 817#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2019-10-22 09:02:46,829 INFO L793 eck$LassoCheckResult]: Loop: 828#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 826#L14 assume !(main_~i~0 < main_~j~0); 827#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 838#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 841#L14 assume !(main_~i~0 < main_~j~0); 821#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 822#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 840#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2019-10-22 09:02:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 925834450, now seen corresponding path program 2 times [2019-10-22 09:02:46,830 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:46,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888302337] [2019-10-22 09:02:46,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,838 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:46,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,839 INFO L82 PathProgramCache]: Analyzing trace with hash -606540634, now seen corresponding path program 1 times [2019-10-22 09:02:46,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:46,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712788316] [2019-10-22 09:02:46,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,846 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash -66410377, now seen corresponding path program 1 times [2019-10-22 09:02:46,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:46,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933172568] [2019-10-22 09:02:46,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:46,859 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:46,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 09:02:46 BoogieIcfgContainer [2019-10-22 09:02:46,964 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 09:02:46,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:02:46,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:02:46,965 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:02:46,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:43" (3/4) ... [2019-10-22 09:02:46,972 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-10-22 09:02:47,012 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b5a44c6c-16e7-4543-9aae-9dd3843155b1/bin/uautomizer/witness.graphml [2019-10-22 09:02:47,012 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:02:47,014 INFO L168 Benchmark]: Toolchain (without parser) took 4209.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -98.6 MB). Peak memory consumption was 45.5 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:47,015 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:47,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:47,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:47,015 INFO L168 Benchmark]: Boogie Preprocessor took 16.51 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:47,016 INFO L168 Benchmark]: RCFGBuilder took 175.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:47,016 INFO L168 Benchmark]: BuchiAutomizer took 3672.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 75.4 MB). Peak memory consumption was 75.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:47,016 INFO L168 Benchmark]: Witness Printer took 47.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:47,025 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 267.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.51 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 175.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3672.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 75.4 MB). Peak memory consumption was 75.4 MB. Max. memory is 11.5 GB. * Witness Printer took 47.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 5 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function j and consists of 5 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function i + -1 * j and consists of 3 locations. One deterministic module has affine ranking function j and consists of 4 locations. One deterministic module has affine ranking function i and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 37 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.6s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 3.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 44 states and ocurred in iteration 4. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 34 SDtfs, 33 SDslu, 6 SDs, 0 SdLazy, 81 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax176 hnf97 lsp55 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf92 smp100 dnf100 smp100 tf109 neg100 sie114 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 23ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.5s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {t=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@23a64ff6=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1b2c03b1=0, i=2, j=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int j; [L8] int t; [L9] i = __VERIFIER_nondet_int() [L10] j = __VERIFIER_nondet_int() [L11] t = 0 [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t Loop: [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND TRUE i > j [L20] j = i [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...