./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Flip2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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 0.1.24-678e011 [2019-11-20 09:46:09,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 09:46:09,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 09:46:09,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 09:46:09,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 09:46:09,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 09:46:09,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 09:46:09,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 09:46:09,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 09:46:09,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 09:46:09,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 09:46:09,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 09:46:09,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 09:46:09,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 09:46:09,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 09:46:09,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 09:46:09,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 09:46:09,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 09:46:09,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 09:46:09,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 09:46:09,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 09:46:09,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 09:46:09,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 09:46:09,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 09:46:09,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 09:46:09,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 09:46:09,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 09:46:09,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 09:46:09,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 09:46:09,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 09:46:09,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 09:46:09,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 09:46:09,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 09:46:09,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 09:46:09,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 09:46:09,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 09:46:09,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 09:46:09,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 09:46:09,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 09:46:09,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 09:46:09,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 09:46:09,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 09:46:09,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 09:46:09,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 09:46:09,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 09:46:09,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 09:46:09,605 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 09:46:09,605 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 09:46:09,606 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 09:46:09,606 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 09:46:09,606 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 09:46:09,606 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 09:46:09,607 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 09:46:09,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 09:46:09,607 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 09:46:09,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 09:46:09,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 09:46:09,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 09:46:09,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 09:46:09,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 09:46:09,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 09:46:09,609 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 09:46:09,609 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 09:46:09,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 09:46:09,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 09:46:09,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 09:46:09,610 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 09:46:09,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 09:46:09,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 09:46:09,610 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 09:46:09,611 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 09:46:09,611 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/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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 [2019-11-20 09:46:09,818 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 09:46:09,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 09:46:09,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 09:46:09,832 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 09:46:09,833 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 09:46:09,833 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-20 09:46:09,896 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/data/f719454d6/d9e2084b5319477d8559e0e08aaba12b/FLAG34bfe0d5b [2019-11-20 09:46:10,297 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 09:46:10,298 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-20 09:46:10,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/data/f719454d6/d9e2084b5319477d8559e0e08aaba12b/FLAG34bfe0d5b [2019-11-20 09:46:10,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/data/f719454d6/d9e2084b5319477d8559e0e08aaba12b [2019-11-20 09:46:10,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 09:46:10,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 09:46:10,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 09:46:10,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 09:46:10,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 09:46:10,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:10,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d042b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10, skipping insertion in model container [2019-11-20 09:46:10,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:10,714 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 09:46:10,730 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 09:46:10,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:46:10,868 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 09:46:10,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:46:10,966 INFO L192 MainTranslator]: Completed translation [2019-11-20 09:46:10,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10 WrapperNode [2019-11-20 09:46:10,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 09:46:10,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 09:46:10,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 09:46:10,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 09:46:10,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:10,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 09:46:11,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 09:46:11,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 09:46:11,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 09:46:11,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... [2019-11-20 09:46:11,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 09:46:11,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 09:46:11,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 09:46:11,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 09:46:11,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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 [2019-11-20 09:46:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 09:46:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 09:46:11,292 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 09:46:11,292 INFO L285 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-20 09:46:11,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:46:11 BoogieIcfgContainer [2019-11-20 09:46:11,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 09:46:11,294 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 09:46:11,294 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 09:46:11,298 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 09:46:11,299 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 09:46:11,299 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 09:46:10" (1/3) ... [2019-11-20 09:46:11,301 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@32984171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 09:46:11, skipping insertion in model container [2019-11-20 09:46:11,301 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 09:46:11,301 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:10" (2/3) ... [2019-11-20 09:46:11,301 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@32984171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 09:46:11, skipping insertion in model container [2019-11-20 09:46:11,302 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 09:46:11,302 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:46:11" (3/3) ... [2019-11-20 09:46:11,303 INFO L371 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2019-11-20 09:46:11,382 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 09:46:11,382 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 09:46:11,383 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 09:46:11,383 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 09:46:11,383 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 09:46:11,384 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 09:46:11,384 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 09:46:11,386 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 09:46:11,403 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-20 09:46:11,429 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 09:46:11,429 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:46:11,430 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:46:11,439 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-20 09:46:11,439 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:46:11,439 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 09:46:11,439 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-20 09:46:11,441 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 09:46:11,441 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:46:11,441 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:46:11,441 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-20 09:46:11,442 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:46:11,450 INFO L794 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 6#L19-2true [2019-11-20 09:46:11,450 INFO L796 eck$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 [2019-11-20 09:46:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-20 09:46:11,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:11,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972193803] [2019-11-20 09:46:11,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:11,567 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:11,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-20 09:46:11,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:11,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123959105] [2019-11-20 09:46:11,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:11,606 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-20 09:46:11,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:11,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983810471] [2019-11-20 09:46:11,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:11,640 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:11,754 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:11,755 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:11,755 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:11,755 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:11,755 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:46:11,755 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:11,756 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:11,756 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:11,756 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-20 09:46:11,756 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:11,757 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:11,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:11,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:11,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:11,931 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:11,931 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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 [2019-11-20 09:46:11,937 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:11,937 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:11,945 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:46:11,945 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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 [2019-11-20 09:46:11,952 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:11,952 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:11,957 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:46:11,957 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:11,963 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:11,963 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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 [2019-11-20 09:46:11,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:46:11,978 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:12,277 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:46:12,279 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:12,279 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:12,280 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:12,280 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:12,280 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:46:12,280 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:12,280 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:12,280 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:12,280 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-20 09:46:12,280 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:12,280 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:12,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:12,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:12,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:12,399 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:12,403 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:12,430 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 [2019-11-20 09:46:12,432 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:12,433 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:12,433 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:12,433 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:12,442 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:46:12,442 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-20 09:46:12,453 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:12,470 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 [2019-11-20 09:46:12,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:12,472 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:12,472 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:12,472 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:12,479 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:46:12,480 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:12,488 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:12,501 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 [2019-11-20 09:46:12,503 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:12,504 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:46:12,504 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:12,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:12,504 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:12,510 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 09:46:12,510 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:12,516 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:46:12,530 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 09:46:12,530 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:12,550 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:46:12,551 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:46:12,551 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:46:12,552 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2019-11-20 09:46:12,557 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:12,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:46:12,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:12,614 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 09:46:12,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:46:12,647 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 [2019-11-20 09:46:12,649 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-11-20 09:46:12,706 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. [2019-11-20 09:46:12,707 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 [2019-11-20 09:46:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:46:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2019-11-20 09:46:12,711 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-20 09:46:12,711 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:12,711 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-20 09:46:12,711 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:12,712 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-20 09:46:12,712 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:12,713 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 43 transitions. [2019-11-20 09:46:12,720 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-20 09:46:12,725 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 19 transitions. [2019-11-20 09:46:12,726 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-20 09:46:12,727 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-20 09:46:12,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-20 09:46:12,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:46:12,728 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-20 09:46:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-20 09:46:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-20 09:46:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-20 09:46:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2019-11-20 09:46:12,763 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-20 09:46:12,763 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-20 09:46:12,763 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 09:46:12,763 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2019-11-20 09:46:12,765 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-20 09:46:12,765 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:46:12,765 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:46:12,766 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 09:46:12,766 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 09:46:12,766 INFO L794 eck$LassoCheckResult]: Stem: 75#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 76#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 78#L14 [2019-11-20 09:46:12,767 INFO L796 eck$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 [2019-11-20 09:46:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:12,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-20 09:46:12,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:12,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84092661] [2019-11-20 09:46:12,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:12,789 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:12,790 INFO L82 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2019-11-20 09:46:12,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:12,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072226778] [2019-11-20 09:46:12,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:12,807 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash 29865627, now seen corresponding path program 1 times [2019-11-20 09:46:12,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:12,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578548492] [2019-11-20 09:46:12,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:12,817 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:12,850 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:12,851 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:12,851 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:12,851 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:12,851 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:46:12,851 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:12,851 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:12,851 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:12,851 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-20 09:46:12,852 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:12,852 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:12,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:12,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:12,866 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:12,954 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:12,954 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:12,970 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:12,970 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 [2019-11-20 09:46:12,978 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:46:12,978 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:12,991 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:12,992 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:12,996 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:46:12,997 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:13,012 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:13,013 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/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:46:13,033 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:13,127 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:46:13,130 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:13,130 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:13,130 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:13,130 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:13,130 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:46:13,130 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,130 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:13,131 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:13,131 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-20 09:46:13,131 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:13,131 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:13,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,227 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:13,227 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:13,233 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 [2019-11-20 09:46:13,238 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:13,238 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:13,238 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:13,238 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:13,244 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:46:13,245 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,252 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:13,270 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 [2019-11-20 09:46:13,272 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:13,273 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:13,273 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:13,273 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:13,282 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:46:13,282 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,293 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:13,310 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 [2019-11-20 09:46:13,312 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:13,312 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:46:13,312 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:13,312 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:13,312 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:13,315 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 09:46:13,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,319 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:46:13,326 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-20 09:46:13,326 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/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) [2019-11-20 09:46:13,357 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:46:13,357 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:46:13,357 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:46:13,357 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-20 09:46:13,360 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:13,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:46:13,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:13,397 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:46:13,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:46:13,427 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 [2019-11-20 09:46:13,427 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-20 09:46:13,465 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. [2019-11-20 09:46:13,466 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 [2019-11-20 09:46:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 09:46:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-20 09:46:13,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-20 09:46:13,468 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:13,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-20 09:46:13,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:13,469 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-20 09:46:13,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:13,469 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 49 transitions. [2019-11-20 09:46:13,471 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-20 09:46:13,475 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 30 states and 44 transitions. [2019-11-20 09:46:13,475 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-11-20 09:46:13,475 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-11-20 09:46:13,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2019-11-20 09:46:13,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:46:13,476 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2019-11-20 09:46:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2019-11-20 09:46:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-20 09:46:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-20 09:46:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2019-11-20 09:46:13,485 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-20 09:46:13,485 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-20 09:46:13,485 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 09:46:13,485 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 37 transitions. [2019-11-20 09:46:13,488 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-20 09:46:13,488 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:46:13,488 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:46:13,488 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 09:46:13,489 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 09:46:13,489 INFO L794 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 161#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 173#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2019-11-20 09:46:13,489 INFO L796 eck$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 [2019-11-20 09:46:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-20 09:46:13,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:13,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025125099] [2019-11-20 09:46:13,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:13,513 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2019-11-20 09:46:13,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:13,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305993712] [2019-11-20 09:46:13,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:13,534 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2019-11-20 09:46:13,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:13,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673314541] [2019-11-20 09:46:13,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:13,563 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:13,595 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:13,595 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:13,595 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:13,595 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:13,595 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:46:13,596 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,596 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:13,596 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:13,596 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-20 09:46:13,596 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:13,596 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:13,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,668 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:13,668 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:13,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:13,685 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:13,691 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:46:13,692 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: [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,705 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:13,706 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:13,713 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:46:13,713 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/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,725 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:13,725 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,745 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:46:13,745 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:13,945 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:46:13,946 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:13,947 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:13,947 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:13,947 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:13,947 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:46:13,947 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:13,947 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:13,947 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:13,948 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-20 09:46:13,948 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:13,948 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:13,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:13,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:14,016 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:14,016 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:14,030 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 [2019-11-20 09:46:14,032 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:14,032 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:14,032 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:14,032 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:14,036 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:46:14,036 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-20 09:46:14,041 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:14,055 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 [2019-11-20 09:46:14,057 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:14,057 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:46:14,058 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:14,058 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:14,058 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:14,059 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 09:46:14,059 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:14,068 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:46:14,071 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 09:46:14,072 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:14,080 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:46:14,081 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:46:14,081 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:46:14,081 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 [] [2019-11-20 09:46:14,092 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:14,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:46:14,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:14,131 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:46:14,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:46:14,150 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 [2019-11-20 09:46:14,150 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19 Second operand 3 states. [2019-11-20 09:46:14,174 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. [2019-11-20 09:46:14,176 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 [2019-11-20 09:46:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:46:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-20 09:46:14,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-20 09:46:14,177 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:14,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-20 09:46:14,177 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:14,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-20 09:46:14,178 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:14,178 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 91 transitions. [2019-11-20 09:46:14,181 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-20 09:46:14,182 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 55 states and 80 transitions. [2019-11-20 09:46:14,182 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-20 09:46:14,183 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2019-11-20 09:46:14,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 80 transitions. [2019-11-20 09:46:14,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:46:14,183 INFO L688 BuchiCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-11-20 09:46:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 80 transitions. [2019-11-20 09:46:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-11-20 09:46:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 09:46:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2019-11-20 09:46:14,194 INFO L711 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-20 09:46:14,194 INFO L591 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-20 09:46:14,194 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 09:46:14,194 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 60 transitions. [2019-11-20 09:46:14,199 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-20 09:46:14,200 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:46:14,200 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:46:14,200 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-20 09:46:14,200 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:46:14,201 INFO L794 eck$LassoCheckResult]: Stem: 285#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 286#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 316#L14 assume !(main_~i~0 < main_~j~0); 291#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 292#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 304#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2019-11-20 09:46:14,201 INFO L796 eck$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 [2019-11-20 09:46:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2019-11-20 09:46:14,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:14,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971400076] [2019-11-20 09:46:14,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:46:14,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971400076] [2019-11-20 09:46:14,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:46:14,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 09:46:14,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025725746] [2019-11-20 09:46:14,267 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 09:46:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-20 09:46:14,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:14,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647771170] [2019-11-20 09:46:14,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:14,280 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:14,332 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:14,332 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:14,332 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:14,332 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:14,333 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:46:14,333 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:14,333 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:14,333 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:14,333 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-20 09:46:14,333 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:14,333 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:14,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:14,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:14,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:14,425 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:14,425 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:14,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:14,431 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:14,449 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:46:14,449 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:15,500 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:46:15,503 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:15,503 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:15,503 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:15,503 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:15,503 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:46:15,503 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:15,503 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:15,503 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:15,503 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-20 09:46:15,503 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:15,504 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:15,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,622 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:15,622 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:15,647 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 09:46:15,650 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:15,650 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:46:15,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:15,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:15,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:15,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 09:46:15,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 09:46:15,656 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:46:15,664 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 09:46:15,664 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:15,676 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:46:15,676 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:46:15,676 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:46:15,676 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:15,681 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 09:46:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:15,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:46:15,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:15,721 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 09:46:15,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:46:15,735 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 [2019-11-20 09:46:15,735 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29 Second operand 3 states. [2019-11-20 09:46:15,760 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. [2019-11-20 09:46:15,762 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 [2019-11-20 09:46:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:46:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-20 09:46:15,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-20 09:46:15,763 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:15,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-20 09:46:15,764 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:15,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-20 09:46:15,764 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:15,764 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 104 transitions. [2019-11-20 09:46:15,767 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2019-11-20 09:46:15,768 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 57 states and 83 transitions. [2019-11-20 09:46:15,768 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-20 09:46:15,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-11-20 09:46:15,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 83 transitions. [2019-11-20 09:46:15,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:46:15,769 INFO L688 BuchiCegarLoop]: Abstraction has 57 states and 83 transitions. [2019-11-20 09:46:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 83 transitions. [2019-11-20 09:46:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-11-20 09:46:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 09:46:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 62 transitions. [2019-11-20 09:46:15,773 INFO L711 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2019-11-20 09:46:15,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:46:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 09:46:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 09:46:15,781 INFO L87 Difference]: Start difference. First operand 42 states and 62 transitions. Second operand 3 states. [2019-11-20 09:46:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:46:15,800 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-11-20 09:46:15,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 09:46:15,800 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 69 transitions. [2019-11-20 09:46:15,802 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-20 09:46:15,803 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 46 states and 63 transitions. [2019-11-20 09:46:15,803 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-20 09:46:15,803 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2019-11-20 09:46:15,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 63 transitions. [2019-11-20 09:46:15,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:46:15,803 INFO L688 BuchiCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-11-20 09:46:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 63 transitions. [2019-11-20 09:46:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-20 09:46:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 09:46:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2019-11-20 09:46:15,808 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-20 09:46:15,808 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-20 09:46:15,808 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 09:46:15,808 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 61 transitions. [2019-11-20 09:46:15,809 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-20 09:46:15,809 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:46:15,809 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:46:15,810 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-20 09:46:15,810 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 09:46:15,810 INFO L794 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 [2019-11-20 09:46:15,810 INFO L796 eck$LassoCheckResult]: Loop: 541#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 542#L14 assume !(main_~i~0 < main_~j~0); 545#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 541#L19-2 [2019-11-20 09:46:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 925765420, now seen corresponding path program 1 times [2019-11-20 09:46:15,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:15,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435245472] [2019-11-20 09:46:15,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:46:15,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435245472] [2019-11-20 09:46:15,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:46:15,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 09:46:15,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692458062] [2019-11-20 09:46:15,837 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 09:46:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash 39886, now seen corresponding path program 2 times [2019-11-20 09:46:15,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:15,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277512716] [2019-11-20 09:46:15,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:15,841 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:15,872 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:15,873 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:15,873 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:15,873 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:15,873 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:46:15,873 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:15,873 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:15,873 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:15,873 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-20 09:46:15,873 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:15,874 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:15,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,945 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:15,945 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:15,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:46:15,949 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:15,957 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:46:15,957 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:46:15,968 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:46:15,970 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:46:15,970 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:46:15,970 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:46:15,970 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:46:15,970 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:46:15,970 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:15,970 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:46:15,970 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:46:15,970 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-20 09:46:15,970 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:46:15,970 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:46:15,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:15,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:46:16,036 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:46:16,036 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:16,045 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 [2019-11-20 09:46:16,046 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:16,047 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:16,047 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:16,047 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:16,048 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:46:16,048 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-20 09:46:16,052 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:16,061 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 [2019-11-20 09:46:16,063 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:46:16,063 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:46:16,063 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:46:16,063 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:46:16,063 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:46:16,065 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 09:46:16,065 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:16,068 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:46:16,072 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 09:46:16,072 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:46:16,076 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:46:16,076 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:46:16,077 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:46:16,077 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-20 09:46:16,080 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:46:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:16,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:46:16,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:46:16,111 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:46:16,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:46:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:46:16,129 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 [2019-11-20 09:46:16,129 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26 Second operand 3 states. [2019-11-20 09:46:16,149 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. [2019-11-20 09:46:16,150 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 [2019-11-20 09:46:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:46:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-20 09:46:16,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-20 09:46:16,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:16,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 9 letters. Loop has 3 letters. [2019-11-20 09:46:16,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:16,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 6 letters. [2019-11-20 09:46:16,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:46:16,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 106 transitions. [2019-11-20 09:46:16,153 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 09:46:16,155 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 60 states and 81 transitions. [2019-11-20 09:46:16,155 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-20 09:46:16,155 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2019-11-20 09:46:16,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 81 transitions. [2019-11-20 09:46:16,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:46:16,156 INFO L688 BuchiCegarLoop]: Abstraction has 60 states and 81 transitions. [2019-11-20 09:46:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 81 transitions. [2019-11-20 09:46:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-20 09:46:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 09:46:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2019-11-20 09:46:16,160 INFO L711 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2019-11-20 09:46:16,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:46:16,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 09:46:16,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 09:46:16,161 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 3 states. [2019-11-20 09:46:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:46:16,173 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-20 09:46:16,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 09:46:16,174 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 67 transitions. [2019-11-20 09:46:16,175 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-20 09:46:16,176 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 49 states and 62 transitions. [2019-11-20 09:46:16,176 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-20 09:46:16,176 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-11-20 09:46:16,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 62 transitions. [2019-11-20 09:46:16,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:46:16,176 INFO L688 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-11-20 09:46:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 62 transitions. [2019-11-20 09:46:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2019-11-20 09:46:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 09:46:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-11-20 09:46:16,180 INFO L711 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-20 09:46:16,180 INFO L591 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-20 09:46:16,180 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 09:46:16,180 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2019-11-20 09:46:16,180 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-20 09:46:16,181 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:46:16,181 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:46:16,181 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-20 09:46:16,181 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2019-11-20 09:46:16,181 INFO L794 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 815#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 835#L14 assume !(main_~i~0 < main_~j~0); 823#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 824#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 817#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2019-11-20 09:46:16,181 INFO L796 eck$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 [2019-11-20 09:46:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash 925834450, now seen corresponding path program 2 times [2019-11-20 09:46:16,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:16,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995595210] [2019-11-20 09:46:16,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:16,192 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:16,193 INFO L82 PathProgramCache]: Analyzing trace with hash -606540634, now seen corresponding path program 1 times [2019-11-20 09:46:16,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:16,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62692920] [2019-11-20 09:46:16,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:16,203 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:46:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash -66410377, now seen corresponding path program 1 times [2019-11-20 09:46:16,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:46:16,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061631407] [2019-11-20 09:46:16,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:46:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:46:16,220 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:46:16,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 09:46:16 BoogieIcfgContainer [2019-11-20 09:46:16,350 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 09:46:16,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 09:46:16,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 09:46:16,351 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 09:46:16,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:46:11" (3/4) ... [2019-11-20 09:46:16,354 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-20 09:46:16,396 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d663ad0c-0bc6-4af5-91e7-bbe05ee17be2/bin/uautomizer/witness.graphml [2019-11-20 09:46:16,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 09:46:16,398 INFO L168 Benchmark]: Toolchain (without parser) took 5699.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -106.9 MB). Peak memory consumption was 85.0 MB. Max. memory is 11.5 GB. [2019-11-20 09:46:16,398 INFO L168 Benchmark]: CDTParser took 0.19 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. [2019-11-20 09:46:16,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -155.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 09:46:16,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.74 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:46:16,400 INFO L168 Benchmark]: Boogie Preprocessor took 18.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:46:16,400 INFO L168 Benchmark]: RCFGBuilder took 270.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-11-20 09:46:16,401 INFO L168 Benchmark]: BuchiAutomizer took 5056.58 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.6 MB). Peak memory consumption was 106.3 MB. Max. memory is 11.5 GB. [2019-11-20 09:46:16,401 INFO L168 Benchmark]: Witness Printer took 45.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2019-11-20 09:46:16,404 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 268.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -155.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.74 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 270.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5056.58 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.6 MB). Peak memory consumption was 106.3 MB. Max. memory is 11.5 GB. * Witness Printer took 45.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 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 4.9s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 4.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. 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: 48ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.8s - 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@5e6c3e4b=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@86c039b=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...