./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 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Flip2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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 0.1.24-6b5699a [2019-11-25 08:46:59,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:46:59,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:46:59,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:46:59,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:46:59,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:46:59,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:46:59,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:46:59,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:46:59,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:46:59,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:46:59,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:46:59,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:46:59,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:46:59,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:46:59,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:46:59,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:46:59,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:46:59,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:46:59,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:46:59,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:46:59,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:46:59,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:46:59,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:46:59,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:46:59,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:46:59,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:46:59,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:46:59,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:46:59,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:46:59,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:46:59,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:46:59,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:46:59,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:46:59,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:46:59,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:46:59,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:46:59,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:46:59,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:46:59,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:46:59,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:46:59,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-25 08:46:59,266 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:46:59,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:46:59,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:46:59,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:46:59,268 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:46:59,268 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-25 08:46:59,268 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-25 08:46:59,269 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-25 08:46:59,269 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-25 08:46:59,269 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-25 08:46:59,269 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-25 08:46:59,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:46:59,270 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:46:59,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:46:59,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:46:59,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-25 08:46:59,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-25 08:46:59,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-25 08:46:59,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:46:59,272 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-25 08:46:59,272 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:46:59,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-25 08:46:59,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:46:59,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:46:59,273 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-25 08:46:59,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:46:59,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:46:59,274 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-25 08:46:59,275 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-25 08:46:59,275 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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 [2019-11-25 08:46:59,485 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:46:59,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:46:59,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:46:59,508 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:46:59,510 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:46:59,511 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-25 08:46:59,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/data/ac2d1b044/f1a4361115604c5093519cb041c622da/FLAG603463449 [2019-11-25 08:47:00,151 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:47:00,152 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-25 08:47:00,159 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/data/ac2d1b044/f1a4361115604c5093519cb041c622da/FLAG603463449 [2019-11-25 08:47:00,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/data/ac2d1b044/f1a4361115604c5093519cb041c622da [2019-11-25 08:47:00,544 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:47:00,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:47:00,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:00,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:47:00,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:47:00,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:00,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d3d68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00, skipping insertion in model container [2019-11-25 08:47:00,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:00,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:47:00,592 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:47:00,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:00,800 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:47:00,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:00,957 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:47:00,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00 WrapperNode [2019-11-25 08:47:00,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:00,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:47:00,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:47:00,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:47:00,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:00,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:00,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:47:01,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:47:01,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:47:01,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:47:01,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:01,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:01,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:01,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:01,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:01,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:01,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... [2019-11-25 08:47:01,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:47:01,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:47:01,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:47:01,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:47:01,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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 [2019-11-25 08:47:01,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:47:01,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:47:01,259 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:47:01,259 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-25 08:47:01,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:01 BoogieIcfgContainer [2019-11-25 08:47:01,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:47:01,261 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-25 08:47:01,261 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-25 08:47:01,265 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-25 08:47:01,265 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:47:01,266 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 08:47:00" (1/3) ... [2019-11-25 08:47:01,267 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4640e3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:47:01, skipping insertion in model container [2019-11-25 08:47:01,267 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:47:01,267 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:00" (2/3) ... [2019-11-25 08:47:01,268 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4640e3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:47:01, skipping insertion in model container [2019-11-25 08:47:01,268 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:47:01,268 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:01" (3/3) ... [2019-11-25 08:47:01,270 INFO L371 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2019-11-25 08:47:01,317 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-25 08:47:01,317 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-25 08:47:01,318 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-25 08:47:01,318 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:47:01,318 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:47:01,318 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-25 08:47:01,318 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:47:01,319 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-25 08:47:01,333 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-25 08:47:01,353 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-25 08:47:01,353 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:01,353 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:01,361 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:47:01,361 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-25 08:47:01,361 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-25 08:47:01,361 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-25 08:47:01,362 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-25 08:47:01,363 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:01,363 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:01,363 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:47:01,363 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-25 08:47:01,371 INFO L794 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 6#L19-2true [2019-11-25 08:47:01,372 INFO L796 eck$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 [2019-11-25 08:47:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-25 08:47:01,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:01,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788334371] [2019-11-25 08:47:01,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:01,491 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:01,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-25 08:47:01,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:01,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529087071] [2019-11-25 08:47:01,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:01,513 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-25 08:47:01,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:01,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919716800] [2019-11-25 08:47:01,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:01,528 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:01,689 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-11-25 08:47:01,702 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:01,703 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:01,703 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:01,703 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:01,704 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:01,704 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:01,704 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:01,704 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:01,705 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-25 08:47:01,705 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:01,705 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:01,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:01,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:01,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:01,882 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:01,882 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:01,904 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:01,904 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:01,921 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:01,922 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: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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 [2019-11-25 08:47:01,948 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:01,948 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:01,954 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:01,954 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:01,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:01,977 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:02,001 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:02,001 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:02,291 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:02,293 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:02,294 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:02,294 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:02,294 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:02,294 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:02,294 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:02,294 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:02,294 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:02,294 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-25 08:47:02,294 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:02,295 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:02,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:02,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:02,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:02,420 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:02,424 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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 [2019-11-25 08:47:02,432 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 [2019-11-25 08:47:02,433 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:02,434 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:02,434 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:02,434 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:02,444 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:47:02,444 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-25 08:47:02,450 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:02,460 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 [2019-11-25 08:47:02,462 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:02,462 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:02,462 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:02,462 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:02,465 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:47:02,465 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-25 08:47:02,472 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:02,480 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 [2019-11-25 08:47:02,482 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:02,482 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:02,483 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:02,483 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:02,483 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:02,486 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:02,486 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 [2019-11-25 08:47:02,490 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:02,495 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:47:02,495 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:02,509 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:02,509 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:02,509 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:02,510 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2019-11-25 08:47:02,515 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 [2019-11-25 08:47:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:02,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:47:02,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:02,588 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:47:02,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:02,628 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 [2019-11-25 08:47:02,629 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-11-25 08:47:02,693 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. [2019-11-25 08:47:02,694 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 [2019-11-25 08:47:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-25 08:47:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2019-11-25 08:47:02,698 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-25 08:47:02,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:02,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-25 08:47:02,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:02,700 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-25 08:47:02,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:02,701 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 43 transitions. [2019-11-25 08:47:02,705 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-25 08:47:02,710 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 19 transitions. [2019-11-25 08:47:02,711 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-25 08:47:02,712 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-25 08:47:02,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-25 08:47:02,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:02,713 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-25 08:47:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-25 08:47:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-25 08:47:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-25 08:47:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2019-11-25 08:47:02,746 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-25 08:47:02,747 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-25 08:47:02,747 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-25 08:47:02,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2019-11-25 08:47:02,748 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-25 08:47:02,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:02,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:02,749 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:47:02,749 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:47:02,749 INFO L794 eck$LassoCheckResult]: Stem: 75#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 76#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 78#L14 [2019-11-25 08:47:02,750 INFO L796 eck$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 [2019-11-25 08:47:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-25 08:47:02,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:02,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958343286] [2019-11-25 08:47:02,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:02,762 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:02,763 INFO L82 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2019-11-25 08:47:02,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:02,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473761711] [2019-11-25 08:47:02,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:02,774 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:02,774 INFO L82 PathProgramCache]: Analyzing trace with hash 29865627, now seen corresponding path program 1 times [2019-11-25 08:47:02,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:02,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764468557] [2019-11-25 08:47:02,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:02,793 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:02,846 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:02,846 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:02,846 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:02,846 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:02,847 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:02,847 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:02,847 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:02,847 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:02,847 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-25 08:47:02,847 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:02,847 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:02,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:02,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:02,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:02,947 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:02,947 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:02,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:02,977 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 [2019-11-25 08:47:02,984 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:02,984 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:03,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:03,009 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:03,017 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:03,017 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:03,038 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:03,038 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:03,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:03,060 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:03,194 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:03,196 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:03,196 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:03,197 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:03,197 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:03,197 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:03,197 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:03,197 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:03,197 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:03,197 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-25 08:47:03,197 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:03,198 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:03,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,301 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:03,301 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:03,316 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 [2019-11-25 08:47:03,320 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:03,321 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:03,321 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:03,321 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:03,327 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:47:03,328 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 [2019-11-25 08:47:03,333 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:03,353 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 [2019-11-25 08:47:03,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:03,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:03,357 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:03,357 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:03,367 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:47:03,367 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 [2019-11-25 08:47:03,373 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:03,389 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 [2019-11-25 08:47:03,391 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:03,391 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:03,391 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:03,391 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:03,391 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:03,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:03,395 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 [2019-11-25 08:47:03,398 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:03,404 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-25 08:47:03,404 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:03,417 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:03,417 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:03,417 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:03,417 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-25 08:47:03,420 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 [2019-11-25 08:47:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:03,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:47:03,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:03,453 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:47:03,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:03,475 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 [2019-11-25 08:47:03,475 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-25 08:47:03,507 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. [2019-11-25 08:47:03,508 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 [2019-11-25 08:47:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-25 08:47:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-25 08:47:03,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-25 08:47:03,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:03,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-25 08:47:03,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:03,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-25 08:47:03,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:03,511 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 49 transitions. [2019-11-25 08:47:03,512 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-25 08:47:03,513 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 30 states and 44 transitions. [2019-11-25 08:47:03,514 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-11-25 08:47:03,514 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-11-25 08:47:03,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2019-11-25 08:47:03,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:03,514 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2019-11-25 08:47:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2019-11-25 08:47:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-25 08:47:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:47:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2019-11-25 08:47:03,519 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-25 08:47:03,519 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-25 08:47:03,519 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-25 08:47:03,519 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 37 transitions. [2019-11-25 08:47:03,520 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-25 08:47:03,520 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:03,521 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:03,521 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:47:03,521 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:47:03,522 INFO L794 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 161#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 173#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2019-11-25 08:47:03,522 INFO L796 eck$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 [2019-11-25 08:47:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:03,522 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-25 08:47:03,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:03,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941764760] [2019-11-25 08:47:03,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:03,534 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2019-11-25 08:47:03,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:03,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180346046] [2019-11-25 08:47:03,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:03,544 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2019-11-25 08:47:03,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:03,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341964590] [2019-11-25 08:47:03,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:03,580 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:03,635 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:03,635 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:03,635 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:03,635 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:03,635 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:03,636 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:03,636 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:03,636 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:03,636 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-25 08:47:03,636 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:03,636 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:03,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,726 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:03,727 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:03,742 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:03,742 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:03,747 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:03,747 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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 [2019-11-25 08:47:03,768 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:03,768 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:03,773 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:03,774 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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 [2019-11-25 08:47:03,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:03,781 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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 [2019-11-25 08:47:03,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:03,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:03,966 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:03,974 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:03,974 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:03,974 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:03,974 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:03,974 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:03,974 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:03,975 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:03,975 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:03,975 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-25 08:47:03,975 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:03,975 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:03,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,980 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:03,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:04,048 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:04,049 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:04,061 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 [2019-11-25 08:47:04,062 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:04,063 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:04,063 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:04,063 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:04,072 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:47:04,072 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-25 08:47:04,080 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:04,100 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 [2019-11-25 08:47:04,102 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:04,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:04,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:04,102 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:04,102 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:04,104 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:04,104 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:04,111 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:04,136 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:47:04,136 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:04,148 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:04,148 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:04,149 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:04,149 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 [] [2019-11-25 08:47:04,159 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 [2019-11-25 08:47:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:04,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:47:04,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:04,204 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:47:04,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:04,230 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 [2019-11-25 08:47:04,230 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19 Second operand 3 states. [2019-11-25 08:47:04,266 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. [2019-11-25 08:47:04,269 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 [2019-11-25 08:47:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-25 08:47:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-25 08:47:04,270 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-25 08:47:04,270 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:04,270 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-25 08:47:04,271 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:04,271 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-25 08:47:04,271 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:04,271 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 91 transitions. [2019-11-25 08:47:04,274 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-25 08:47:04,281 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 55 states and 80 transitions. [2019-11-25 08:47:04,283 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-25 08:47:04,284 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2019-11-25 08:47:04,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 80 transitions. [2019-11-25 08:47:04,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:04,285 INFO L688 BuchiCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-11-25 08:47:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 80 transitions. [2019-11-25 08:47:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-11-25 08:47:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-25 08:47:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2019-11-25 08:47:04,294 INFO L711 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-25 08:47:04,294 INFO L591 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-25 08:47:04,295 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-25 08:47:04,295 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 60 transitions. [2019-11-25 08:47:04,297 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-25 08:47:04,299 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:04,299 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:04,300 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-25 08:47:04,300 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-25 08:47:04,300 INFO L794 eck$LassoCheckResult]: Stem: 285#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 286#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 316#L14 assume !(main_~i~0 < main_~j~0); 291#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 292#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 304#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2019-11-25 08:47:04,301 INFO L796 eck$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 [2019-11-25 08:47:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2019-11-25 08:47:04,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:04,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058456268] [2019-11-25 08:47:04,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:04,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058456268] [2019-11-25 08:47:04,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:04,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:47:04,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363484510] [2019-11-25 08:47:04,378 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-25 08:47:04,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:04,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2718586] [2019-11-25 08:47:04,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:04,401 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:04,452 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:04,453 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:04,453 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:04,453 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:04,453 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:04,453 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:04,453 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:04,454 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:04,454 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-25 08:47:04,454 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:04,454 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:04,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:04,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:04,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:04,561 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:04,561 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:04,568 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:04,568 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:04,585 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:04,586 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:05,732 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:05,734 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:05,735 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:05,735 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:05,735 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:05,735 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:05,735 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:05,735 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:05,735 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:05,735 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-25 08:47:05,735 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:05,736 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:05,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:05,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:05,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:05,875 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:05,875 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:05,886 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 [2019-11-25 08:47:05,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:05,888 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:05,888 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:05,889 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:05,889 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:05,891 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:05,891 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:05,899 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:05,907 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:47:05,907 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:05,912 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:05,912 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:05,912 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:05,912 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2019-11-25 08:47:05,923 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:05,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:47:05,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:05,963 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:47:05,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:05,978 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 [2019-11-25 08:47:05,978 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29 Second operand 3 states. [2019-11-25 08:47:06,016 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. [2019-11-25 08:47:06,018 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 [2019-11-25 08:47:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-25 08:47:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-25 08:47:06,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-25 08:47:06,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:06,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-25 08:47:06,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:06,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-25 08:47:06,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:06,020 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 104 transitions. [2019-11-25 08:47:06,026 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2019-11-25 08:47:06,028 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 57 states and 83 transitions. [2019-11-25 08:47:06,029 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-25 08:47:06,030 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-11-25 08:47:06,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 83 transitions. [2019-11-25 08:47:06,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:06,031 INFO L688 BuchiCegarLoop]: Abstraction has 57 states and 83 transitions. [2019-11-25 08:47:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 83 transitions. [2019-11-25 08:47:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-11-25 08:47:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:47:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 62 transitions. [2019-11-25 08:47:06,039 INFO L711 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2019-11-25 08:47:06,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:47:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:47:06,046 INFO L87 Difference]: Start difference. First operand 42 states and 62 transitions. Second operand 3 states. [2019-11-25 08:47:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:06,075 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-11-25 08:47:06,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:47:06,076 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 69 transitions. [2019-11-25 08:47:06,077 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-25 08:47:06,078 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 46 states and 63 transitions. [2019-11-25 08:47:06,078 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-25 08:47:06,079 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2019-11-25 08:47:06,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 63 transitions. [2019-11-25 08:47:06,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:06,079 INFO L688 BuchiCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-11-25 08:47:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 63 transitions. [2019-11-25 08:47:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-25 08:47:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-25 08:47:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2019-11-25 08:47:06,084 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-25 08:47:06,084 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-25 08:47:06,084 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-25 08:47:06,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 61 transitions. [2019-11-25 08:47:06,085 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-25 08:47:06,086 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:06,086 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:06,086 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-25 08:47:06,086 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:47:06,087 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 [2019-11-25 08:47:06,087 INFO L796 eck$LassoCheckResult]: Loop: 541#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 542#L14 assume !(main_~i~0 < main_~j~0); 545#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 541#L19-2 [2019-11-25 08:47:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:06,087 INFO L82 PathProgramCache]: Analyzing trace with hash 925765420, now seen corresponding path program 1 times [2019-11-25 08:47:06,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:06,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361988340] [2019-11-25 08:47:06,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:06,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361988340] [2019-11-25 08:47:06,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:06,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:47:06,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076424434] [2019-11-25 08:47:06,130 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash 39886, now seen corresponding path program 2 times [2019-11-25 08:47:06,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:06,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091228529] [2019-11-25 08:47:06,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,137 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:06,175 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:06,175 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:06,175 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:06,176 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:06,176 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:06,176 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:06,176 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:06,176 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:06,176 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-25 08:47:06,176 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:06,177 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:06,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:06,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:06,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:06,263 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:06,263 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:06,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:06,273 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:06,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:06,285 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:06,300 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:06,302 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:06,302 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:06,303 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:06,303 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:06,303 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:06,303 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:06,303 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:06,303 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:06,303 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-25 08:47:06,304 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:06,304 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:06,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:06,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:06,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:06,373 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:06,373 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:06,388 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 [2019-11-25 08:47:06,390 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:06,391 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:06,391 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:06,391 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:06,393 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:47:06,393 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:06,398 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:06,405 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 [2019-11-25 08:47:06,408 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:06,408 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:06,408 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:06,408 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:06,409 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:06,410 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:06,410 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 [2019-11-25 08:47:06,414 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:06,418 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:47:06,418 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_16a7118d-b1ee-471e-9b92-818e12f0b1c3/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) [2019-11-25 08:47:06,423 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:06,424 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:06,424 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:06,424 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-25 08:47:06,426 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 [2019-11-25 08:47:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:06,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:47:06,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:06,460 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:47:06,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:06,477 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 [2019-11-25 08:47:06,477 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26 Second operand 3 states. [2019-11-25 08:47:06,511 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. [2019-11-25 08:47:06,515 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 [2019-11-25 08:47:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-25 08:47:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-25 08:47:06,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-25 08:47:06,516 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:06,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 9 letters. Loop has 3 letters. [2019-11-25 08:47:06,517 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:06,517 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 6 letters. [2019-11-25 08:47:06,517 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:06,517 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 106 transitions. [2019-11-25 08:47:06,519 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:47:06,520 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 60 states and 81 transitions. [2019-11-25 08:47:06,520 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-25 08:47:06,521 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2019-11-25 08:47:06,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 81 transitions. [2019-11-25 08:47:06,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:06,521 INFO L688 BuchiCegarLoop]: Abstraction has 60 states and 81 transitions. [2019-11-25 08:47:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 81 transitions. [2019-11-25 08:47:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-25 08:47:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-25 08:47:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2019-11-25 08:47:06,533 INFO L711 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2019-11-25 08:47:06,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:47:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:47:06,534 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 3 states. [2019-11-25 08:47:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:06,551 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-25 08:47:06,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:47:06,554 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 67 transitions. [2019-11-25 08:47:06,555 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-25 08:47:06,555 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 49 states and 62 transitions. [2019-11-25 08:47:06,555 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-25 08:47:06,555 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-11-25 08:47:06,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 62 transitions. [2019-11-25 08:47:06,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:06,556 INFO L688 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-11-25 08:47:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 62 transitions. [2019-11-25 08:47:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2019-11-25 08:47:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-25 08:47:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-11-25 08:47:06,558 INFO L711 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-25 08:47:06,558 INFO L591 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-25 08:47:06,559 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-25 08:47:06,559 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2019-11-25 08:47:06,559 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-25 08:47:06,559 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:06,559 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:06,560 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-25 08:47:06,560 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2019-11-25 08:47:06,560 INFO L794 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 815#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 835#L14 assume !(main_~i~0 < main_~j~0); 823#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 824#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 817#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2019-11-25 08:47:06,560 INFO L796 eck$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 [2019-11-25 08:47:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:06,560 INFO L82 PathProgramCache]: Analyzing trace with hash 925834450, now seen corresponding path program 2 times [2019-11-25 08:47:06,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:06,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996258879] [2019-11-25 08:47:06,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,572 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash -606540634, now seen corresponding path program 1 times [2019-11-25 08:47:06,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:06,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57434720] [2019-11-25 08:47:06,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,585 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash -66410377, now seen corresponding path program 1 times [2019-11-25 08:47:06,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:06,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928928760] [2019-11-25 08:47:06,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:06,609 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:06,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 08:47:06 BoogieIcfgContainer [2019-11-25 08:47:06,769 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-25 08:47:06,770 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:47:06,770 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:47:06,770 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:47:06,771 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:01" (3/4) ... [2019-11-25 08:47:06,774 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-25 08:47:06,839 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_16a7118d-b1ee-471e-9b92-818e12f0b1c3/bin/uautomizer/witness.graphml [2019-11-25 08:47:06,840 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:47:06,841 INFO L168 Benchmark]: Toolchain (without parser) took 6295.70 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 236.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -144.4 MB). Peak memory consumption was 92.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:06,842 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:47:06,842 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.1 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -227.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:06,842 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.28 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:47:06,843 INFO L168 Benchmark]: Boogie Preprocessor took 21.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:06,843 INFO L168 Benchmark]: RCFGBuilder took 239.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:06,844 INFO L168 Benchmark]: BuchiAutomizer took 5508.06 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 51.4 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 58.7 MB). Peak memory consumption was 110.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:06,844 INFO L168 Benchmark]: Witness Printer took 69.73 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:06,847 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 412.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.1 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -227.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.28 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 239.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5508.06 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 51.4 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 58.7 MB). Peak memory consumption was 110.1 MB. Max. memory is 11.5 GB. * Witness Printer took 69.73 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 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 5.4s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 4.6s. Construction of modules took 0.1s. 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, 0.1s 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: 24ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.0s - 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@7ac60a5e=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@31585a82=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...