./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/Piecewise.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/Piecewise.c -s /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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 36155f521cfe170e9c03fd915618e68821fe0430 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 22:23:27,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:23:27,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:23:27,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:23:27,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:23:27,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:23:27,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:23:27,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:23:27,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:23:27,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:23:27,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:23:27,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:23:27,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:23:27,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:23:27,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:23:27,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:23:27,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:23:27,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:23:27,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:23:27,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:23:27,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:23:27,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:23:27,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:23:27,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:23:27,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:23:27,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:23:27,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:23:27,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:23:27,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:23:27,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:23:27,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:23:27,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:23:27,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:23:27,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:23:27,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:23:27,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:23:27,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:23:27,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:23:27,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:23:27,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:23:27,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:23:27,366 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-19 22:23:27,393 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:23:27,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:23:27,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:23:27,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:23:27,404 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:23:27,404 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-19 22:23:27,405 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-19 22:23:27,405 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-19 22:23:27,405 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-19 22:23:27,405 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-19 22:23:27,406 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-19 22:23:27,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:23:27,406 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:23:27,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:23:27,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:23:27,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-19 22:23:27,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-19 22:23:27,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-19 22:23:27,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:23:27,408 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-19 22:23:27,408 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:23:27,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-19 22:23:27,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:23:27,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:23:27,409 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-19 22:23:27,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:23:27,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:23:27,409 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-19 22:23:27,410 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-19 22:23:27,410 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_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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 -> 36155f521cfe170e9c03fd915618e68821fe0430 [2019-11-19 22:23:27,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:23:27,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:23:27,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:23:27,585 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:23:27,585 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:23:27,586 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/Piecewise.c [2019-11-19 22:23:27,641 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/data/cfae43723/c21eb2fb7d2349c29cbb542a8de18b4a/FLAG6379c094c [2019-11-19 22:23:28,020 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:23:28,020 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/sv-benchmarks/c/termination-crafted/Piecewise.c [2019-11-19 22:23:28,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/data/cfae43723/c21eb2fb7d2349c29cbb542a8de18b4a/FLAG6379c094c [2019-11-19 22:23:28,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/data/cfae43723/c21eb2fb7d2349c29cbb542a8de18b4a [2019-11-19 22:23:28,400 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:23:28,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:23:28,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:23:28,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:23:28,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:23:28,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46659513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28, skipping insertion in model container [2019-11-19 22:23:28,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,420 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:23:28,437 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:23:28,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:23:28,622 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:23:28,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:23:28,706 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:23:28,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28 WrapperNode [2019-11-19 22:23:28,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:23:28,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:23:28,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:23:28,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:23:28,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:23:28,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:23:28,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:23:28,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:23:28,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... [2019-11-19 22:23:28,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:23:28,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:23:28,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:23:28,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:23:28,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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 [2019-11-19 22:23:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:23:28,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:23:28,956 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:23:28,956 INFO L285 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-19 22:23:28,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:23:28 BoogieIcfgContainer [2019-11-19 22:23:28,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:23:28,958 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-19 22:23:28,958 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-19 22:23:28,961 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-19 22:23:28,962 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:23:28,962 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 10:23:28" (1/3) ... [2019-11-19 22:23:28,963 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56908f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:23:28, skipping insertion in model container [2019-11-19 22:23:28,963 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:23:28,964 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:23:28" (2/3) ... [2019-11-19 22:23:28,964 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56908f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:23:28, skipping insertion in model container [2019-11-19 22:23:28,964 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:23:28,964 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:23:28" (3/3) ... [2019-11-19 22:23:28,966 INFO L371 chiAutomizerObserver]: Analyzing ICFG Piecewise.c [2019-11-19 22:23:29,006 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-19 22:23:29,006 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-19 22:23:29,007 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-19 22:23:29,007 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:23:29,007 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:23:29,007 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-19 22:23:29,007 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:23:29,007 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-19 22:23:29,019 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 22:23:29,067 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:29,067 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:29,067 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:29,073 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 22:23:29,073 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 22:23:29,074 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-19 22:23:29,074 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 22:23:29,075 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:29,075 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:29,075 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:29,075 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 22:23:29,075 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 22:23:29,083 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L26-2true [2019-11-19 22:23:29,083 INFO L796 eck$LassoCheckResult]: Loop: 8#L26-2true assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 6#L23true assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 8#L26-2true [2019-11-19 22:23:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:29,088 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-19 22:23:29,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:29,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710990379] [2019-11-19 22:23:29,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,185 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-19 22:23:29,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:29,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784757692] [2019-11-19 22:23:29,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,201 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-19 22:23:29,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:29,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949017388] [2019-11-19 22:23:29,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,215 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:29,281 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:29,281 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:29,282 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:29,282 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:29,282 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:23:29,282 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,282 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:29,283 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:29,283 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2019-11-19 22:23:29,283 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:29,283 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:29,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:29,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:29,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:29,421 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:29,422 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:29,428 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:29,428 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,438 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:23:29,438 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:23:29,446 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:29,446 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,451 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:23:29,451 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_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,462 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:29,465 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:29,487 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:23:29,488 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 [2019-11-19 22:23:29,502 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:23:29,504 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:29,504 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:29,504 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:29,504 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:29,504 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:23:29,504 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,505 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:29,505 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:29,505 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2019-11-19 22:23:29,505 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:29,505 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:29,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:29,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:29,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:29,617 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:29,621 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:23:29,639 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 [2019-11-19 22:23:29,642 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:29,642 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:29,643 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:29,643 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:29,651 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:23:29,651 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,657 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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 [2019-11-19 22:23:29,665 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 [2019-11-19 22:23:29,666 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:29,666 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:29,666 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:29,666 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:29,670 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:23:29,670 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:23:29,674 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,694 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 [2019-11-19 22:23:29,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:29,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:23:29,696 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:29,696 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:29,696 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:29,699 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:23:29,699 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:23:29,702 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:23:29,707 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:23:29,707 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_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:29,718 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:23:29,725 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:23:29,726 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:23:29,726 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2019-11-19 22:23:29,731 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:23:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:29,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:29,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:29,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:29,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:29,817 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 [2019-11-19 22:23:29,819 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-11-19 22:23:29,887 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 37 states and 48 transitions. Complement of second has 8 states. [2019-11-19 22:23:29,888 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 [2019-11-19 22:23:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:23:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2019-11-19 22:23:29,891 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-19 22:23:29,892 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:29,892 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-19 22:23:29,892 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:29,892 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-19 22:23:29,892 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:29,893 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 48 transitions. [2019-11-19 22:23:29,896 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-19 22:23:29,899 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 13 states and 19 transitions. [2019-11-19 22:23:29,900 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-19 22:23:29,900 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-19 22:23:29,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-19 22:23:29,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:23:29,901 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-19 22:23:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-19 22:23:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-19 22:23:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-19 22:23:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2019-11-19 22:23:29,924 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-19 22:23:29,925 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-19 22:23:29,925 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-19 22:23:29,925 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2019-11-19 22:23:29,926 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-19 22:23:29,926 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:29,926 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:29,926 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-19 22:23:29,926 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:23:29,927 INFO L794 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 87#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 88#L23 [2019-11-19 22:23:29,927 INFO L796 eck$LassoCheckResult]: Loop: 88#L23 assume !(main_~q~0 < main_~p~0); 89#L26 assume !(main_~p~0 < main_~q~0); 92#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 88#L23 [2019-11-19 22:23:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-19 22:23:29,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:29,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873869002] [2019-11-19 22:23:29,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:29,936 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2019-11-19 22:23:29,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:29,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789697506] [2019-11-19 22:23:29,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:29,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789697506] [2019-11-19 22:23:29,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:23:29,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 22:23:29,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119489481] [2019-11-19 22:23:29,979 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-19 22:23:29,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:23:29,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:23:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:23:29,983 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-19 22:23:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:23:30,002 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2019-11-19 22:23:30,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:23:30,003 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2019-11-19 22:23:30,004 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:30,004 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 12 transitions. [2019-11-19 22:23:30,005 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-19 22:23:30,005 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-19 22:23:30,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2019-11-19 22:23:30,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:23:30,005 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2019-11-19 22:23:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2019-11-19 22:23:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-11-19 22:23:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-19 22:23:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2019-11-19 22:23:30,007 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-19 22:23:30,007 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-19 22:23:30,007 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-19 22:23:30,007 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2019-11-19 22:23:30,007 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:30,008 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:30,008 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:30,008 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-19 22:23:30,008 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:23:30,008 INFO L794 eck$LassoCheckResult]: Stem: 116#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 117#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 118#L23 assume !(main_~q~0 < main_~p~0); 114#L26 [2019-11-19 22:23:30,009 INFO L796 eck$LassoCheckResult]: Loop: 114#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 115#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 121#L23 assume !(main_~q~0 < main_~p~0); 114#L26 [2019-11-19 22:23:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-19 22:23:30,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:30,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608817629] [2019-11-19 22:23:30,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,017 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2019-11-19 22:23:30,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:30,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767677208] [2019-11-19 22:23:30,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,027 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:30,028 INFO L82 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2019-11-19 22:23:30,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:30,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450913532] [2019-11-19 22:23:30,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,041 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:30,090 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:30,091 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:30,091 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:30,091 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:30,091 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:23:30,091 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,091 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:30,091 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:30,091 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2019-11-19 22:23:30,091 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:30,092 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:30,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,216 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:30,217 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:30,229 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:30,229 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 [2019-11-19 22:23:30,238 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:23:30,238 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_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:30,255 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:30,255 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:30,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:23:30,273 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 [2019-11-19 22:23:30,428 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:23:30,430 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:30,430 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:30,431 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:30,431 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:30,431 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:23:30,431 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,431 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:30,431 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:30,431 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2019-11-19 22:23:30,432 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:30,432 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:30,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,553 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:30,553 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:30,561 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 [2019-11-19 22:23:30,563 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:30,563 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:30,563 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:30,563 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:30,571 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:23:30,571 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,576 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,588 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 [2019-11-19 22:23:30,589 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:30,589 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:23:30,590 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:30,590 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:30,590 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:30,592 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:23:30,592 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:23:30,595 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:23:30,603 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-19 22:23:30,603 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,609 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:23:30,610 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:23:30,610 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:23:30,610 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2019-11-19 22:23:30,612 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:23:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:30,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:30,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:30,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:30,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:30,675 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-19 22:23:30,676 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-11-19 22:23:30,698 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 16 states and 20 transitions. Complement of second has 7 states. [2019-11-19 22:23:30,699 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 [2019-11-19 22:23:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:23:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-19 22:23:30,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-19 22:23:30,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:30,700 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-19 22:23:30,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:30,700 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-19 22:23:30,701 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:30,701 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 20 transitions. [2019-11-19 22:23:30,702 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:30,702 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 17 transitions. [2019-11-19 22:23:30,702 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-19 22:23:30,702 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-11-19 22:23:30,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2019-11-19 22:23:30,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:23:30,703 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-19 22:23:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2019-11-19 22:23:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-19 22:23:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-19 22:23:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-19 22:23:30,705 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-19 22:23:30,705 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-19 22:23:30,705 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-19 22:23:30,705 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2019-11-19 22:23:30,706 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:30,706 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:30,706 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:30,706 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 22:23:30,706 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 22:23:30,707 INFO L794 eck$LassoCheckResult]: Stem: 185#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 186#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 190#L23 assume !(main_~q~0 < main_~p~0); 192#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 184#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 191#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 182#L26-2 [2019-11-19 22:23:30,707 INFO L796 eck$LassoCheckResult]: Loop: 182#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 187#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 182#L26-2 [2019-11-19 22:23:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2019-11-19 22:23:30,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:30,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204518815] [2019-11-19 22:23:30,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,721 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-19 22:23:30,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:30,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588361231] [2019-11-19 22:23:30,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,728 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 666829459, now seen corresponding path program 2 times [2019-11-19 22:23:30,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:30,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266705507] [2019-11-19 22:23:30,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:30,746 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:30,779 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:30,779 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:30,780 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:30,780 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:30,780 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:23:30,780 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,780 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:30,780 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:30,780 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2019-11-19 22:23:30,780 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:30,781 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:30,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,859 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:30,860 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:30,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:30,871 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:23:30,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:23:30,910 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:23:30,912 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:30,912 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:30,913 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:30,913 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:30,913 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:23:30,913 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:30,913 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:30,913 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:30,913 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2019-11-19 22:23:30,913 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:30,914 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:30,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:30,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,009 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:31,010 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:23:31,022 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 [2019-11-19 22:23:31,024 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:31,024 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:23:31,024 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:31,024 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:31,024 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:31,026 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:23:31,026 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:31,029 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:23:31,032 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-19 22:23:31,032 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:31,045 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:23:31,045 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:23:31,045 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:23:31,045 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:31,047 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:23:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:31,137 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 [2019-11-19 22:23:31,137 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7 Second operand 3 states. [2019-11-19 22:23:31,159 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7. Second operand 3 states. Result 27 states and 34 transitions. Complement of second has 5 states. [2019-11-19 22:23:31,161 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 [2019-11-19 22:23:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:23:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-19 22:23:31,161 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-19 22:23:31,162 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,162 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-19 22:23:31,162 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,162 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-19 22:23:31,162 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,162 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 34 transitions. [2019-11-19 22:23:31,164 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:31,164 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 23 states and 30 transitions. [2019-11-19 22:23:31,165 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-11-19 22:23:31,165 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-11-19 22:23:31,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2019-11-19 22:23:31,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:23:31,165 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-19 22:23:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2019-11-19 22:23:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-11-19 22:23:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 22:23:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2019-11-19 22:23:31,167 INFO L711 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2019-11-19 22:23:31,168 INFO L591 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2019-11-19 22:23:31,168 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-19 22:23:31,168 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 28 transitions. [2019-11-19 22:23:31,169 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:31,169 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:31,172 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:31,173 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2019-11-19 22:23:31,173 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 22:23:31,173 INFO L794 eck$LassoCheckResult]: Stem: 268#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 269#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 272#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 273#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 276#L23 assume !(main_~q~0 < main_~p~0); 265#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 266#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 279#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 280#L26-2 [2019-11-19 22:23:31,173 INFO L796 eck$LassoCheckResult]: Loop: 280#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 281#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 280#L26-2 [2019-11-19 22:23:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash 602336749, now seen corresponding path program 3 times [2019-11-19 22:23:31,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:31,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471003022] [2019-11-19 22:23:31,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,202 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 3 times [2019-11-19 22:23:31,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:31,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066821276] [2019-11-19 22:23:31,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,210 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,210 INFO L82 PathProgramCache]: Analyzing trace with hash -974968848, now seen corresponding path program 4 times [2019-11-19 22:23:31,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:31,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154691041] [2019-11-19 22:23:31,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,228 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:31,266 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:31,266 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:31,267 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:31,267 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:31,267 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:23:31,267 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:31,267 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:31,267 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:31,267 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2019-11-19 22:23:31,268 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:31,268 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:31,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,338 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:31,338 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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 [2019-11-19 22:23:31,351 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:31,351 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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 [2019-11-19 22:23:31,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:23:31,360 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:23:31,369 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:23:31,371 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:31,371 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:31,371 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:31,371 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:31,371 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:23:31,371 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:31,371 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:31,371 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:31,371 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2019-11-19 22:23:31,372 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:31,372 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:31,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,466 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:31,466 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:31,471 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 [2019-11-19 22:23:31,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:31,472 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:23:31,473 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:31,473 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:31,473 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:31,475 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:23:31,475 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:23:31,478 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:23:31,483 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:23:31,483 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_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:23:31,493 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:23:31,493 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:23:31,493 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:23:31,493 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:31,498 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:23:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:31,541 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 [2019-11-19 22:23:31,541 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand 3 states. [2019-11-19 22:23:31,556 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand 3 states. Result 29 states and 38 transitions. Complement of second has 5 states. [2019-11-19 22:23:31,557 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 [2019-11-19 22:23:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:23:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-19 22:23:31,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-19 22:23:31,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,557 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:23:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:31,602 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 22:23:31,602 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand 3 states. [2019-11-19 22:23:31,612 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand 3 states. Result 29 states and 38 transitions. Complement of second has 5 states. [2019-11-19 22:23:31,612 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 [2019-11-19 22:23:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:23:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-19 22:23:31,613 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-19 22:23:31,613 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,613 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:23:31,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:31,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:31,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:31,666 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 22:23:31,666 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand 3 states. [2019-11-19 22:23:31,678 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand 3 states. Result 33 states and 45 transitions. Complement of second has 4 states. [2019-11-19 22:23:31,679 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 [2019-11-19 22:23:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:23:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-11-19 22:23:31,679 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-19 22:23:31,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2019-11-19 22:23:31,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 4 letters. [2019-11-19 22:23:31,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:31,681 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 45 transitions. [2019-11-19 22:23:31,682 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-19 22:23:31,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 27 states and 36 transitions. [2019-11-19 22:23:31,683 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-11-19 22:23:31,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2019-11-19 22:23:31,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 36 transitions. [2019-11-19 22:23:31,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:23:31,683 INFO L688 BuchiCegarLoop]: Abstraction has 27 states and 36 transitions. [2019-11-19 22:23:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 36 transitions. [2019-11-19 22:23:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2019-11-19 22:23:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-19 22:23:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2019-11-19 22:23:31,685 INFO L711 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-19 22:23:31,685 INFO L591 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-19 22:23:31,685 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-19 22:23:31,686 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2019-11-19 22:23:31,686 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-19 22:23:31,686 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:31,686 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:31,687 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 22:23:31,687 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2019-11-19 22:23:31,687 INFO L794 eck$LassoCheckResult]: Stem: 503#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 504#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 512#L23 assume !(main_~q~0 < main_~p~0); 511#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 502#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 509#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 510#L26-2 [2019-11-19 22:23:31,687 INFO L796 eck$LassoCheckResult]: Loop: 510#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 505#L23 assume !(main_~q~0 < main_~p~0); 499#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 500#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 508#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 510#L26-2 [2019-11-19 22:23:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 5 times [2019-11-19 22:23:31,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:31,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549532454] [2019-11-19 22:23:31,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,697 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 38328847, now seen corresponding path program 1 times [2019-11-19 22:23:31,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:31,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472430502] [2019-11-19 22:23:31,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,706 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1292746272, now seen corresponding path program 6 times [2019-11-19 22:23:31,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:31,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683263193] [2019-11-19 22:23:31,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:31,722 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:31,771 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:31,771 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:31,772 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:31,772 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:31,772 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:23:31,772 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:31,772 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:31,772 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:31,772 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2019-11-19 22:23:31,772 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:31,772 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:31,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:31,851 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:31,851 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:31,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:31,857 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:31,872 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:23:31,872 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 [2019-11-19 22:23:32,082 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:23:32,084 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:32,084 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:32,084 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:32,085 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:32,085 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:23:32,085 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,085 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:32,085 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:32,085 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2019-11-19 22:23:32,085 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:32,085 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:32,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,193 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:32,193 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:32,202 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 [2019-11-19 22:23:32,204 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:32,204 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:23:32,205 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:32,205 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:32,205 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:32,208 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:23:32,208 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,213 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:23:32,220 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:23:32,220 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:32,226 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:23:32,226 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:23:32,226 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:23:32,226 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,229 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:23:32,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:32,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:32,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:32,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:23:32,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:32,313 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2019-11-19 22:23:32,314 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 9 Second operand 6 states. [2019-11-19 22:23:32,403 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 9. Second operand 6 states. Result 41 states and 58 transitions. Complement of second has 10 states. [2019-11-19 22:23:32,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-19 22:23:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:23:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 14 transitions. [2019-11-19 22:23:32,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 14 transitions. Stem has 6 letters. Loop has 5 letters. [2019-11-19 22:23:32,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:32,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 14 transitions. Stem has 11 letters. Loop has 5 letters. [2019-11-19 22:23:32,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:32,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 14 transitions. Stem has 6 letters. Loop has 10 letters. [2019-11-19 22:23:32,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:32,405 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 41 states and 58 transitions. [2019-11-19 22:23:32,407 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:32,407 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 41 states to 34 states and 48 transitions. [2019-11-19 22:23:32,408 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-11-19 22:23:32,408 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-11-19 22:23:32,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 48 transitions. [2019-11-19 22:23:32,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:23:32,408 INFO L688 BuchiCegarLoop]: Abstraction has 34 states and 48 transitions. [2019-11-19 22:23:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states and 48 transitions. [2019-11-19 22:23:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2019-11-19 22:23:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-19 22:23:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2019-11-19 22:23:32,411 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 35 transitions. [2019-11-19 22:23:32,411 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 35 transitions. [2019-11-19 22:23:32,411 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-19 22:23:32,411 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 35 transitions. [2019-11-19 22:23:32,412 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:23:32,412 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:23:32,412 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:23:32,413 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 1, 1, 1, 1] [2019-11-19 22:23:32,413 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:23:32,413 INFO L794 eck$LassoCheckResult]: Stem: 625#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 626#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 637#L23 assume !(main_~q~0 < main_~p~0); 621#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 622#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 634#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 635#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 631#L23 [2019-11-19 22:23:32,413 INFO L796 eck$LassoCheckResult]: Loop: 631#L23 assume !(main_~q~0 < main_~p~0); 633#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 630#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 631#L23 [2019-11-19 22:23:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:32,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1363962694, now seen corresponding path program 7 times [2019-11-19 22:23:32,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:32,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485299234] [2019-11-19 22:23:32,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:32,430 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash 44774, now seen corresponding path program 2 times [2019-11-19 22:23:32,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:32,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174193814] [2019-11-19 22:23:32,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:32,446 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash 872985485, now seen corresponding path program 8 times [2019-11-19 22:23:32,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:23:32,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030373146] [2019-11-19 22:23:32,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:23:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:23:32,466 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:23:32,510 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:32,510 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:32,510 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:32,510 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:32,510 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:23:32,510 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,510 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:32,510 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:32,510 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2019-11-19 22:23:32,510 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:32,511 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:32,511 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,642 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:32,642 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:32,645 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,645 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:23:32,650 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:23:32,650 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_11=0} Honda state: {v_rep~unnamed0~0~false_11=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,654 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:32,654 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:23:32,658 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:23:32,658 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_11=1} Honda state: {v_rep~unnamed0~0~true_11=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,662 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:23:32,662 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,679 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:23:32,679 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:23:32,901 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:23:32,903 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:23:32,903 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:23:32,903 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:23:32,903 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:23:32,903 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:23:32,903 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:32,903 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:23:32,903 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:23:32,903 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2019-11-19 22:23:32,903 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:23:32,903 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:23:32,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:32,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:23:33,035 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:23:33,035 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:33,038 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 [2019-11-19 22:23:33,039 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:33,040 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:33,040 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:33,040 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:33,043 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:23:33,043 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:23:33,045 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/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) [2019-11-19 22:23:33,049 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 [2019-11-19 22:23:33,051 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:33,051 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:33,051 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:23:33,051 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:23:33,053 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:23:33,053 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:23:33,057 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 34 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:33,070 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 [2019-11-19 22:23:33,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:23:33,072 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:23:33,072 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:23:33,072 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-19 22:23:33,072 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:33,075 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-19 22:23:33,075 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:23:33,081 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:23:33,089 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-19 22:23:33,089 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_baef67f2-7dbb-4b83-9b25-5e70c174ad80/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:23:33,098 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:23:33,098 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:23:33,098 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:23:33,098 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2019-11-19 22:23:33,109 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:23:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:33,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:33,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:33,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:33,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:33,139 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 [2019-11-19 22:23:33,139 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 35 transitions. cyclomatic complexity: 17 Second operand 4 states. [2019-11-19 22:23:33,155 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 35 transitions. cyclomatic complexity: 17. Second operand 4 states. Result 27 states and 40 transitions. Complement of second has 7 states. [2019-11-19 22:23:33,156 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 [2019-11-19 22:23:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:23:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 5 transitions. [2019-11-19 22:23:33,156 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 5 transitions. Stem has 7 letters. Loop has 3 letters. [2019-11-19 22:23:33,157 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:33,157 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:23:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:33,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:33,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:33,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:33,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:33,190 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 22:23:33,190 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 35 transitions. cyclomatic complexity: 17 Second operand 4 states. [2019-11-19 22:23:33,207 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 35 transitions. cyclomatic complexity: 17. Second operand 4 states. Result 27 states and 40 transitions. Complement of second has 7 states. [2019-11-19 22:23:33,207 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 [2019-11-19 22:23:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:23:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 5 transitions. [2019-11-19 22:23:33,208 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 5 transitions. Stem has 7 letters. Loop has 3 letters. [2019-11-19 22:23:33,208 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:33,208 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:23:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:23:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:33,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:23:33,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:23:33,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:23:33,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:23:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:23:33,233 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 22:23:33,233 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 35 transitions. cyclomatic complexity: 17 Second operand 4 states. [2019-11-19 22:23:33,250 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 35 transitions. cyclomatic complexity: 17. Second operand 4 states. Result 36 states and 57 transitions. Complement of second has 6 states. [2019-11-19 22:23:33,253 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 [2019-11-19 22:23:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:23:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2019-11-19 22:23:33,253 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2019-11-19 22:23:33,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:33,253 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 10 letters. Loop has 3 letters. [2019-11-19 22:23:33,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:33,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 6 letters. [2019-11-19 22:23:33,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:23:33,254 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 57 transitions. [2019-11-19 22:23:33,255 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-19 22:23:33,255 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2019-11-19 22:23:33,256 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-19 22:23:33,256 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-19 22:23:33,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-19 22:23:33,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-19 22:23:33,256 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:23:33,256 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:23:33,256 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:23:33,256 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-19 22:23:33,256 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-19 22:23:33,256 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-19 22:23:33,256 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-19 22:23:33,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 10:23:33 BoogieIcfgContainer [2019-11-19 22:23:33,262 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-19 22:23:33,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:23:33,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:23:33,263 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:23:33,263 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:23:28" (3/4) ... [2019-11-19 22:23:33,266 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-19 22:23:33,266 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:23:33,268 INFO L168 Benchmark]: Toolchain (without parser) took 4866.21 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 224.4 MB). Free memory was 950.1 MB in the beginning and 969.5 MB in the end (delta: -19.4 MB). Peak memory consumption was 205.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:23:33,268 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:23:33,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -204.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:23:33,269 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.84 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. [2019-11-19 22:23:33,270 INFO L168 Benchmark]: Boogie Preprocessor took 22.18 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. [2019-11-19 22:23:33,270 INFO L168 Benchmark]: RCFGBuilder took 195.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. [2019-11-19 22:23:33,271 INFO L168 Benchmark]: BuchiAutomizer took 4304.09 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 969.5 MB in the end (delta: 167.8 MB). Peak memory consumption was 231.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:23:33,271 INFO L168 Benchmark]: Witness Printer took 3.88 ms. Allocated memory is still 1.3 GB. Free memory is still 969.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:23:33,274 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -204.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.84 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 22.18 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. * RCFGBuilder took 195.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4304.09 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 969.5 MB in the end (delta: 167.8 MB). Peak memory consumption was 231.7 MB. Max. memory is 11.5 GB. * Witness Printer took 3.88 ms. Allocated memory is still 1.3 GB. Free memory is still 969.5 MB. There was no memory consumed. 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 (1 trivial, 4 deterministic, 2 nondeterministic). One deterministic module has affine ranking function q and consists of 5 locations. One deterministic module has affine ranking function p and consists of 4 locations. One deterministic module has affine ranking function q and consists of 3 locations. One deterministic module has affine ranking function q and consists of 6 locations. One nondeterministic module has affine ranking function q and consists of 3 locations. One nondeterministic module has affine ranking function p and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.2s and 8 iterations. TraceHistogramMax:3. Analysis of lassos took 3.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 23 states and ocurred in iteration 6. Nontrivial modules had stage [4, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 49 SDtfs, 56 SDslu, 9 SDs, 0 SdLazy, 120 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT6 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax161 hnf99 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp93 dnf112 smp98 tf106 neg98 sie117 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 34ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...