./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 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/Piecewise.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.2.1-dev-20ed64e [2021-08-27 13:55:37,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 13:55:37,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 13:55:37,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 13:55:37,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 13:55:37,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 13:55:37,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 13:55:37,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 13:55:37,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 13:55:37,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 13:55:37,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 13:55:37,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 13:55:37,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 13:55:37,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 13:55:37,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 13:55:37,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 13:55:37,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 13:55:37,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 13:55:37,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 13:55:37,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 13:55:37,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 13:55:37,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 13:55:37,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 13:55:37,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 13:55:37,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 13:55:37,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 13:55:37,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 13:55:37,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 13:55:37,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 13:55:37,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 13:55:37,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 13:55:37,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 13:55:37,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 13:55:37,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 13:55:37,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 13:55:37,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 13:55:38,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 13:55:38,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 13:55:38,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 13:55:38,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 13:55:38,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 13:55:38,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 13:55:38,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 13:55:38,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 13:55:38,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 13:55:38,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 13:55:38,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 13:55:38,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 13:55:38,037 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 13:55:38,038 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 13:55:38,038 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 13:55:38,038 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 13:55:38,038 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 13:55:38,038 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 13:55:38,039 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 13:55:38,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 13:55:38,039 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 13:55:38,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 13:55:38,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 13:55:38,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 13:55:38,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 13:55:38,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 13:55:38,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 13:55:38,040 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 13:55:38,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 13:55:38,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 13:55:38,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 13:55:38,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 13:55:38,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 13:55:38,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 13:55:38,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 13:55:38,042 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 13:55:38,043 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36155f521cfe170e9c03fd915618e68821fe0430 [2021-08-27 13:55:38,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 13:55:38,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 13:55:38,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 13:55:38,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 13:55:38,362 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 13:55:38,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Piecewise.c [2021-08-27 13:55:38,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc800a54e/a92b46443985473ea960d5a133e08da3/FLAG72d76865c [2021-08-27 13:55:38,841 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 13:55:38,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Piecewise.c [2021-08-27 13:55:38,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc800a54e/a92b46443985473ea960d5a133e08da3/FLAG72d76865c [2021-08-27 13:55:38,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc800a54e/a92b46443985473ea960d5a133e08da3 [2021-08-27 13:55:38,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 13:55:38,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 13:55:38,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 13:55:38,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 13:55:38,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 13:55:38,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:55:38" (1/1) ... [2021-08-27 13:55:38,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199f64df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:38, skipping insertion in model container [2021-08-27 13:55:38,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:55:38" (1/1) ... [2021-08-27 13:55:38,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 13:55:38,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 13:55:38,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:55:38,992 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 13:55:39,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:55:39,011 INFO L208 MainTranslator]: Completed translation [2021-08-27 13:55:39,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39 WrapperNode [2021-08-27 13:55:39,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 13:55:39,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 13:55:39,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 13:55:39,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 13:55:39,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 13:55:39,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 13:55:39,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 13:55:39,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 13:55:39,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 13:55:39,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 13:55:39,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 13:55:39,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 13:55:39,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (1/1) ... [2021-08-27 13:55:39,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:39,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:39,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:39,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 13:55:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 13:55:39,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 13:55:39,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 13:55:39,283 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 13:55:39,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:39 BoogieIcfgContainer [2021-08-27 13:55:39,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 13:55:39,286 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 13:55:39,286 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 13:55:39,289 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 13:55:39,290 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:39,290 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 01:55:38" (1/3) ... [2021-08-27 13:55:39,291 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3fd76b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:55:39, skipping insertion in model container [2021-08-27 13:55:39,291 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:39,291 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:39" (2/3) ... [2021-08-27 13:55:39,291 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3fd76b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:55:39, skipping insertion in model container [2021-08-27 13:55:39,292 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:39,292 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:39" (3/3) ... [2021-08-27 13:55:39,293 INFO L389 chiAutomizerObserver]: Analyzing ICFG Piecewise.c [2021-08-27 13:55:39,357 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 13:55:39,357 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 13:55:39,358 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 13:55:39,358 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 13:55:39,358 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 13:55:39,358 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 13:55:39,358 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 13:55:39,358 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 13:55:39,369 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:39,383 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:39,383 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:39,383 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:39,389 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 13:55:39,389 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:55:39,389 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 13:55:39,390 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:39,391 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:39,391 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:39,391 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:39,392 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 13:55:39,392 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:55:39,402 INFO L791 eck$LassoCheckResult]: Stem: 4#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; 5#L26-2true [2021-08-27 13:55:39,403 INFO L793 eck$LassoCheckResult]: Loop: 5#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; 5#L26-2true [2021-08-27 13:55:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 13:55:39,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:39,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625562428] [2021-08-27 13:55:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:39,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:39,485 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:39,505 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-08-27 13:55:39,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:39,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064614610] [2021-08-27 13:55:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:39,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:39,529 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:39,539 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-08-27 13:55:39,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:39,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16862388] [2021-08-27 13:55:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:39,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:39,555 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:39,565 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:39,680 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:39,681 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:39,681 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:39,681 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:39,681 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:39,681 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:39,682 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:39,682 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:39,682 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-08-27 13:55:39,683 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:39,683 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:39,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:39,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:39,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:39,822 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:39,823 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:39,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:39,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:39,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 13:55:39,837 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:39,837 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:39,864 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:39,864 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: [] [2021-08-27 13:55:39,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:39,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:39,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:39,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:39,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 13:55:39,898 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:39,898 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:39,928 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:39,928 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: [] [2021-08-27 13:55:39,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:39,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:39,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:39,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:39,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 13:55:39,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:39,954 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:39,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:39,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,016 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:40,016 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:40,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 13:55:40,069 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:40,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,075 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:40,075 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:40,076 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:40,076 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:40,076 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:40,076 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,076 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:40,076 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:40,076 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-08-27 13:55:40,076 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:40,076 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:40,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:40,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:40,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:40,153 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:40,156 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:40,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 13:55:40,165 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:40,172 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:40,172 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:40,172 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:40,173 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:40,176 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:55:40,176 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:55:40,188 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:40,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 13:55:40,216 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:40,222 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:40,223 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:40,223 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:40,223 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:40,226 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:55:40,226 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:55:40,242 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:40,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,283 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:40,290 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:40,291 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:40,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:40,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:40,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:40,293 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:40,293 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:40,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 13:55:40,312 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:40,316 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 13:55:40,316 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:55:40,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 13:55:40,321 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:40,321 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:40,321 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:40,321 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-08-27 13:55:40,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,350 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:40,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:40,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:40,429 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 [2021-08-27 13:55:40,431 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:40,481 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 37 states and 48 transitions. Complement of second has 8 states. [2021-08-27 13:55:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2021-08-27 13:55:40,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 2 letters. [2021-08-27 13:55:40,486 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:40,487 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-27 13:55:40,487 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:40,487 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 4 letters. [2021-08-27 13:55:40,487 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:40,488 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 48 transitions. [2021-08-27 13:55:40,494 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 13:55:40,497 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 13 states and 19 transitions. [2021-08-27 13:55:40,497 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-08-27 13:55:40,498 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-08-27 13:55:40,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2021-08-27 13:55:40,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:40,498 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-08-27 13:55:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2021-08-27 13:55:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-08-27 13:55:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2021-08-27 13:55:40,515 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-08-27 13:55:40,515 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-08-27 13:55:40,515 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 13:55:40,515 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2021-08-27 13:55:40,521 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 13:55:40,521 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:40,522 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:40,522 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:55:40,522 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:55:40,522 INFO L791 eck$LassoCheckResult]: Stem: 82#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; 83#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 85#L23 [2021-08-27 13:55:40,523 INFO L793 eck$LassoCheckResult]: Loop: 85#L23 assume !(main_~q~0 < main_~p~0); 88#L26 assume !(main_~p~0 < main_~q~0); 84#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 85#L23 [2021-08-27 13:55:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-08-27 13:55:40,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:40,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754509912] [2021-08-27 13:55:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:40,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,532 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,544 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2021-08-27 13:55:40,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:40,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155578346] [2021-08-27 13:55:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:40,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:40,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:40,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:40,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155578346] [2021-08-27 13:55:40,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155578346] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:55:40,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 13:55:40,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 13:55:40,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962589217] [2021-08-27 13:55:40,584 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 13:55:40,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:55:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 13:55:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 13:55:40,588 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:55:40,600 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-08-27 13:55:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 13:55:40,600 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2021-08-27 13:55:40,601 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:40,602 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 12 transitions. [2021-08-27 13:55:40,602 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-27 13:55:40,602 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 13:55:40,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2021-08-27 13:55:40,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:40,602 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-08-27 13:55:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2021-08-27 13:55:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-08-27 13:55:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-08-27 13:55:40,604 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-08-27 13:55:40,604 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-08-27 13:55:40,604 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 13:55:40,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-08-27 13:55:40,604 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:40,605 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:40,605 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:40,605 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 13:55:40,605 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:55:40,605 INFO L791 eck$LassoCheckResult]: Stem: 114#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 115#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 119#L23 assume !(main_~q~0 < main_~p~0); 121#L26 [2021-08-27 13:55:40,605 INFO L793 eck$LassoCheckResult]: Loop: 121#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; 116#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 117#L23 assume !(main_~q~0 < main_~p~0); 121#L26 [2021-08-27 13:55:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-08-27 13:55:40,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:40,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272483938] [2021-08-27 13:55:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:40,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,610 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,613 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2021-08-27 13:55:40,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:40,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341842461] [2021-08-27 13:55:40,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:40,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,618 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,621 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2021-08-27 13:55:40,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:40,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712047737] [2021-08-27 13:55:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:40,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,627 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:40,632 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:40,672 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:40,673 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:40,673 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:40,673 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:40,673 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:40,673 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,673 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:40,673 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:40,673 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-08-27 13:55:40,673 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:40,674 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:40,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:40,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:40,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:40,767 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:40,768 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:40,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,773 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 13:55:40,776 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:40,776 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:40,809 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:40,810 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: [] [2021-08-27 13:55:40,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,832 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 13:55:40,834 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:40,834 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:40,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:40,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:40,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 13:55:40,869 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:40,869 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:40,983 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:40,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:40,987 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:40,987 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:40,987 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:40,987 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:40,987 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:40,987 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:40,987 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:40,987 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:40,987 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-08-27 13:55:40,987 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:40,987 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:40,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:40,992 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,079 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:41,079 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:41,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:41,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:41,090 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:41,096 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:41,097 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:41,097 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:41,097 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:41,099 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:55:41,099 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:55:41,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 13:55:41,128 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:41,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:41,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:41,154 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:41,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 13:55:41,161 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:41,168 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:41,168 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:41,168 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:41,168 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:41,169 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:41,171 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:41,171 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:41,178 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:41,186 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:55:41,186 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:55:41,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:41,187 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:41,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 13:55:41,189 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:41,189 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:41,189 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:41,189 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-08-27 13:55:41,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:41,207 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:41,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:41,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:41,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:41,286 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 [2021-08-27 13:55:41,286 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:41,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:41,336 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 16 states and 20 transitions. Complement of second has 7 states. [2021-08-27 13:55:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-08-27 13:55:41,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2021-08-27 13:55:41,339 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:41,340 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2021-08-27 13:55:41,340 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:41,340 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2021-08-27 13:55:41,341 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:41,341 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 20 transitions. [2021-08-27 13:55:41,341 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:41,343 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 17 transitions. [2021-08-27 13:55:41,343 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-27 13:55:41,344 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-08-27 13:55:41,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2021-08-27 13:55:41,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:41,344 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-08-27 13:55:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2021-08-27 13:55:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-08-27 13:55:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-08-27 13:55:41,347 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-08-27 13:55:41,347 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-08-27 13:55:41,347 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 13:55:41,347 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2021-08-27 13:55:41,348 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:41,348 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:41,349 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:41,349 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-08-27 13:55:41,350 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:55:41,350 INFO L791 eck$LassoCheckResult]: Stem: 181#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 182#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 186#L23 assume !(main_~q~0 < main_~p~0); 192#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 190#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 191#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 183#L26-2 [2021-08-27 13:55:41,351 INFO L793 eck$LassoCheckResult]: Loop: 183#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 184#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; 183#L26-2 [2021-08-27 13:55:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,351 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2021-08-27 13:55:41,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:41,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124461937] [2021-08-27 13:55:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:41,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,362 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,378 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-08-27 13:55:41,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:41,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321547419] [2021-08-27 13:55:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:41,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,389 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,391 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash 666829459, now seen corresponding path program 2 times [2021-08-27 13:55:41,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:41,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98350092] [2021-08-27 13:55:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:41,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,398 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,405 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:41,452 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:41,453 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:41,453 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:41,453 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:41,453 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:41,453 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,453 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:41,453 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:41,453 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-08-27 13:55:41,453 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:41,453 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:41,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,530 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:41,530 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:41,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:41,537 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:41,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 13:55:41,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:41,542 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:41,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:41,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:41,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:41,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 13:55:41,591 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:41,592 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:41,653 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:41,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:41,656 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:41,656 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:41,656 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:41,656 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:41,656 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:41,656 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,656 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:41,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:41,657 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-08-27 13:55:41,657 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:41,657 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:41,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,730 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:41,731 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:41,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:41,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:41,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 13:55:41,734 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:41,740 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:41,740 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:41,740 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:41,740 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:41,740 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:41,742 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:41,742 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:41,744 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:41,747 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:55:41,747 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:55:41,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:41,748 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:41,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 13:55:41,750 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:41,750 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:41,750 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:41,750 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-08-27 13:55:41,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:41,767 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:41,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:41,851 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 [2021-08-27 13:55:41,852 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:41,869 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 27 states and 34 transitions. Complement of second has 5 states. [2021-08-27 13:55:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-08-27 13:55:41,869 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-08-27 13:55:41,870 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:41,870 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-08-27 13:55:41,870 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:41,870 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2021-08-27 13:55:41,870 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:41,870 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 34 transitions. [2021-08-27 13:55:41,871 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:41,872 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 23 states and 30 transitions. [2021-08-27 13:55:41,872 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 13:55:41,872 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-08-27 13:55:41,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2021-08-27 13:55:41,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:41,872 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-08-27 13:55:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2021-08-27 13:55:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-08-27 13:55:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-08-27 13:55:41,874 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-08-27 13:55:41,874 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-08-27 13:55:41,874 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 13:55:41,874 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 28 transitions. [2021-08-27 13:55:41,875 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:41,875 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:41,875 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:41,875 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-08-27 13:55:41,875 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:55:41,875 INFO L791 eck$LassoCheckResult]: Stem: 265#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 266#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 283#L23 assume !(main_~q~0 < main_~p~0); 281#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 280#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 275#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 267#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 269#L23 assume !(main_~q~0 < main_~p~0); 271#L26 [2021-08-27 13:55:41,875 INFO L793 eck$LassoCheckResult]: Loop: 271#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; 278#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); 271#L26 [2021-08-27 13:55:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,876 INFO L82 PathProgramCache]: Analyzing trace with hash 666829461, now seen corresponding path program 3 times [2021-08-27 13:55:41,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:41,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366989389] [2021-08-27 13:55:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:41,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,882 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,889 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 2 times [2021-08-27 13:55:41,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:41,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371643546] [2021-08-27 13:55:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:41,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,893 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,896 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1292746274, now seen corresponding path program 4 times [2021-08-27 13:55:41,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:41,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628709307] [2021-08-27 13:55:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:41,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,903 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:41,911 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:41,954 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:41,954 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:41,955 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:41,955 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:41,955 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:41,955 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:41,955 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:41,955 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:41,955 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-08-27 13:55:41,955 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:41,955 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:41,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:41,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:42,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:42,059 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:42,059 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:42,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:42,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:42,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:42,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-27 13:55:42,068 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:42,068 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:42,078 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:42,079 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:42,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:42,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:42,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:42,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:42,098 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:42,098 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:42,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-27 13:55:42,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:42,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:42,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:42,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-08-27 13:55:42,167 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:42,167 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:42,271 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:42,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-08-27 13:55:42,274 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:42,274 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:42,274 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:42,274 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:42,274 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:42,274 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:42,274 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:42,274 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:42,274 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-08-27 13:55:42,274 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:42,275 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:42,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:42,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:42,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:42,360 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:42,361 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:42,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:42,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:42,362 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:42,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-08-27 13:55:42,367 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:42,374 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:42,375 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:42,375 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:42,375 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:42,375 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:42,377 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:42,377 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:42,400 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:42,413 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 13:55:42,413 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:55:42,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:42,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:42,414 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:42,421 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:42,421 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:42,421 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:42,422 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-08-27 13:55:42,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-08-27 13:55:42,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:42,447 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:42,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:42,551 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 [2021-08-27 13:55:42,552 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:42,568 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 28 states and 35 transitions. Complement of second has 7 states. [2021-08-27 13:55:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:42,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-08-27 13:55:42,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 3 letters. [2021-08-27 13:55:42,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:42,570 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:42,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:42,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:42,651 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2021-08-27 13:55:42,651 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:42,672 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 34 transitions. Complement of second has 7 states. [2021-08-27 13:55:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2021-08-27 13:55:42,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 8 letters. Loop has 3 letters. [2021-08-27 13:55:42,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:42,673 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:42,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:42,765 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 3 loop predicates [2021-08-27 13:55:42,765 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:42,784 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 34 states and 42 transitions. Complement of second has 6 states. [2021-08-27 13:55:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-08-27 13:55:42,785 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 3 letters. [2021-08-27 13:55:42,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:42,785 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 11 letters. Loop has 3 letters. [2021-08-27 13:55:42,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:42,786 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 6 letters. [2021-08-27 13:55:42,786 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:42,786 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 42 transitions. [2021-08-27 13:55:42,787 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-08-27 13:55:42,788 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 25 states and 33 transitions. [2021-08-27 13:55:42,788 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-08-27 13:55:42,788 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 13:55:42,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 33 transitions. [2021-08-27 13:55:42,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:42,788 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-08-27 13:55:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 33 transitions. [2021-08-27 13:55:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-08-27 13:55:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-08-27 13:55:42,790 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-08-27 13:55:42,790 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-08-27 13:55:42,790 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-27 13:55:42,790 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 21 transitions. [2021-08-27 13:55:42,791 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-08-27 13:55:42,791 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:42,791 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:42,791 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-08-27 13:55:42,792 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2021-08-27 13:55:42,792 INFO L791 eck$LassoCheckResult]: Stem: 516#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 517#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 519#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 524#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 522#L23 assume !(main_~q~0 < main_~p~0); 523#L26 [2021-08-27 13:55:42,792 INFO L793 eck$LassoCheckResult]: Loop: 523#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; 520#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 521#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; 528#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 529#L23 assume !(main_~q~0 < main_~p~0); 523#L26 [2021-08-27 13:55:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 29863400, now seen corresponding path program 1 times [2021-08-27 13:55:42,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:42,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770773439] [2021-08-27 13:55:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:42,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:42,798 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:42,802 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash 45563257, now seen corresponding path program 1 times [2021-08-27 13:55:42,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:42,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754308898] [2021-08-27 13:55:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:42,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:42,817 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:42,829 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:42,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:42,830 INFO L82 PathProgramCache]: Analyzing trace with hash -974968846, now seen corresponding path program 5 times [2021-08-27 13:55:42,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:42,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879384427] [2021-08-27 13:55:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:42,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:42,836 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:42,847 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:42,919 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:42,919 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:42,919 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:42,919 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:42,919 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:42,919 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:42,919 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:42,919 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:42,919 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-08-27 13:55:42,919 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:42,919 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:42,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:42,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:42,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:43,004 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:43,004 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:43,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,005 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,013 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:43,013 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:43,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-08-27 13:55:43,025 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:43,025 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:43,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:43,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,043 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-08-27 13:55:43,046 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:43,046 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:43,067 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:43,067 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:43,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-08-27 13:55:43,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,084 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-08-27 13:55:43,093 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:43,093 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:43,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:43,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,124 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,127 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:43,127 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:43,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-08-27 13:55:43,274 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:43,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:43,278 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:43,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:43,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:43,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:43,278 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:43,278 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,278 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:43,278 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:43,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-08-27 13:55:43,278 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:43,278 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:43,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:43,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:43,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:43,395 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:43,395 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:43,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,396 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,409 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:43,417 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:43,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:43,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:43,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:43,420 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:55:43,420 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:55:43,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-08-27 13:55:43,425 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:43,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-08-27 13:55:43,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,441 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-08-27 13:55:43,443 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:43,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:43,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:43,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:43,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:43,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:43,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:43,451 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:43,453 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:43,455 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:55:43,455 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:55:43,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,456 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-08-27 13:55:43,460 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:43,460 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:43,460 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:43,460 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-08-27 13:55:43,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:43,479 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:43,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 13:55:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:43,572 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 [2021-08-27 13:55:43,572 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8 Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:43,590 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 31 states and 39 transitions. Complement of second has 7 states. [2021-08-27 13:55:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-08-27 13:55:43,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 5 letters. [2021-08-27 13:55:43,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:43,593 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:43,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:43,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 13:55:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:43,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:43,704 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 4 loop predicates [2021-08-27 13:55:43,704 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8 Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:43,742 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 33 states and 44 transitions. Complement of second has 8 states. [2021-08-27 13:55:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-08-27 13:55:43,743 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 5 letters. [2021-08-27 13:55:43,743 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:43,743 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 10 letters. Loop has 5 letters. [2021-08-27 13:55:43,743 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:43,743 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 10 letters. [2021-08-27 13:55:43,743 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:43,743 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 44 transitions. [2021-08-27 13:55:43,744 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:55:43,745 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 26 states and 35 transitions. [2021-08-27 13:55:43,745 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-08-27 13:55:43,745 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-08-27 13:55:43,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-08-27 13:55:43,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:43,745 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-08-27 13:55:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-08-27 13:55:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-08-27 13:55:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-08-27 13:55:43,747 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-08-27 13:55:43,748 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-08-27 13:55:43,748 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-08-27 13:55:43,748 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 34 transitions. [2021-08-27 13:55:43,748 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:55:43,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:43,749 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:43,749 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-08-27 13:55:43,749 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:55:43,749 INFO L791 eck$LassoCheckResult]: Stem: 695#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 696#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 698#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 713#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 701#L23 assume !(main_~q~0 < main_~p~0); 702#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 712#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 710#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 709#L26-2 [2021-08-27 13:55:43,749 INFO L793 eck$LassoCheckResult]: Loop: 709#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 708#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; 709#L26-2 [2021-08-27 13:55:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash 602336749, now seen corresponding path program 6 times [2021-08-27 13:55:43,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:43,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894638310] [2021-08-27 13:55:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:43,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:43,756 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:43,761 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 3 times [2021-08-27 13:55:43,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:43,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464181012] [2021-08-27 13:55:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:43,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:43,766 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:43,768 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash -974968848, now seen corresponding path program 7 times [2021-08-27 13:55:43,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:43,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655011746] [2021-08-27 13:55:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:43,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:43,776 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:43,782 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:43,812 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:43,812 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:43,813 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:43,813 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:43,813 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:43,813 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,813 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:43,813 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:43,813 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-08-27 13:55:43,813 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:43,813 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:43,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:43,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:43,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:43,864 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:43,864 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:43,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,866 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,873 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:43,873 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:43,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-08-27 13:55:43,895 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:43,895 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: [] [2021-08-27 13:55:43,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-08-27 13:55:43,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,911 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-08-27 13:55:43,913 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:43,913 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:43,923 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:43,923 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: [] [2021-08-27 13:55:43,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:43,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,944 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-08-27 13:55:43,946 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:43,946 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:43,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-08-27 13:55:43,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:43,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:43,971 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:43,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-08-27 13:55:43,974 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:43,974 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:44,002 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:44,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-08-27 13:55:44,006 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:44,007 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:44,007 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:44,007 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:44,007 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:44,007 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:44,007 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:44,007 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:44,007 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-08-27 13:55:44,007 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:44,007 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:44,008 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:44,015 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:44,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:44,052 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:44,052 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:44,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:44,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:44,054 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:44,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-08-27 13:55:44,056 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:44,062 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:44,062 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:44,062 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:44,062 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:44,062 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:44,063 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:44,063 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:44,065 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:44,066 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 13:55:44,066 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:55:44,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:44,067 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:55:44,081 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:44,081 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:44,081 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:44,081 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-08-27 13:55:44,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-08-27 13:55:44,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:44,098 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:44,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:44,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:44,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:44,173 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 [2021-08-27 13:55:44,174 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:44,183 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 33 states and 43 transitions. Complement of second has 5 states. [2021-08-27 13:55:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-08-27 13:55:44,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-08-27 13:55:44,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:44,185 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:44,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:44,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:44,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:44,243 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 [2021-08-27 13:55:44,243 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:44,252 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 33 states and 43 transitions. Complement of second has 5 states. [2021-08-27 13:55:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-08-27 13:55:44,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-08-27 13:55:44,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:44,255 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:55:44,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:44,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:44,319 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 [2021-08-27 13:55:44,320 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:44,332 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 35 states and 46 transitions. Complement of second has 4 states. [2021-08-27 13:55:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-08-27 13:55:44,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 2 letters. [2021-08-27 13:55:44,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:44,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2021-08-27 13:55:44,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:44,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 4 letters. [2021-08-27 13:55:44,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:44,333 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 46 transitions. [2021-08-27 13:55:44,334 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:55:44,334 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2021-08-27 13:55:44,334 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 13:55:44,334 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 13:55:44,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 13:55:44,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:55:44,334 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:44,335 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:44,335 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:44,335 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-08-27 13:55:44,335 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 13:55:44,335 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:55:44,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 13:55:44,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 01:55:44 BoogieIcfgContainer [2021-08-27 13:55:44,340 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 13:55:44,341 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 13:55:44,341 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 13:55:44,341 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 13:55:44,341 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:39" (3/4) ... [2021-08-27 13:55:44,344 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 13:55:44,344 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 13:55:44,345 INFO L168 Benchmark]: Toolchain (without parser) took 5475.10 ms. Allocated memory was 60.8 MB in the beginning and 113.2 MB in the end (delta: 52.4 MB). Free memory was 39.3 MB in the beginning and 46.0 MB in the end (delta: -6.7 MB). Peak memory consumption was 45.0 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:44,345 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:44,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.02 ms. Allocated memory is still 60.8 MB. Free memory was 39.1 MB in the beginning and 30.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:44,346 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.80 ms. Allocated memory is still 60.8 MB. Free memory was 30.7 MB in the beginning and 44.1 MB in the end (delta: -13.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:44,346 INFO L168 Benchmark]: Boogie Preprocessor took 12.49 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 43.2 MB in the end (delta: 837.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:44,346 INFO L168 Benchmark]: RCFGBuilder took 210.82 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 34.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:44,347 INFO L168 Benchmark]: BuchiAutomizer took 5054.03 ms. Allocated memory was 60.8 MB in the beginning and 113.2 MB in the end (delta: 52.4 MB). Free memory was 34.1 MB in the beginning and 47.0 MB in the end (delta: -12.9 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:44,347 INFO L168 Benchmark]: Witness Printer took 3.09 ms. Allocated memory is still 113.2 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:44,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 141.02 ms. Allocated memory is still 60.8 MB. Free memory was 39.1 MB in the beginning and 30.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.80 ms. Allocated memory is still 60.8 MB. Free memory was 30.7 MB in the beginning and 44.1 MB in the end (delta: -13.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.49 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 43.2 MB in the end (delta: 837.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 210.82 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 34.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5054.03 ms. Allocated memory was 60.8 MB in the beginning and 113.2 MB in the end (delta: 52.4 MB). Free memory was 34.1 MB in the beginning and 47.0 MB in the end (delta: -12.9 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.09 ms. Allocated memory is still 113.2 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 p and consists of 5 locations. One nondeterministic module has affine ranking function p and consists of 4 locations. One nondeterministic module has affine ranking function q and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.9s and 8 iterations. TraceHistogramMax:3. Analysis of lassos took 3.6s. Construction of modules took 0.1s. Büchi inclusion checks took 1.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 17.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 15 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 6. Nontrivial modules had stage [3, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 56 SDtfs, 69 SDslu, 9 SDs, 0 SdLazy, 123 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 114.7ms Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT6 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax162 hnf100 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq159 hnf93 smp90 dnf100 smp100 tf107 neg98 sie118 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 30ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 13:55:44,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:44,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...