./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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-lit/Urban-WST2013-Fig2.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 31d0c4253184c01eb9f9573658b07bed7aa94585 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:41:35,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:41:35,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:41:35,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:41:35,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:41:35,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:41:35,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:41:35,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:41:35,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:41:35,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:41:35,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:41:35,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:41:35,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:41:35,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:41:35,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:41:35,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:41:35,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:41:35,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:41:35,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:41:35,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:41:35,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:41:35,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:41:35,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:41:35,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:41:35,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:41:35,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:41:35,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:41:35,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:41:35,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:41:35,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:41:35,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:41:35,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:41:35,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:41:35,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:41:35,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:41:35,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:41:35,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:41:35,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:41:35,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:41:35,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:41:35,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:41:35,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:41:35,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:41:35,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:41:35,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:41:35,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:41:35,177 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:41:35,178 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:41:35,178 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:41:35,178 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:41:35,178 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:41:35,179 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:41:35,180 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:41:35,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:41:35,180 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:41:35,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:41:35,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:41:35,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:41:35,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:41:35,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:41:35,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:41:35,183 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:41:35,183 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:41:35,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:41:35,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:41:35,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:41:35,184 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:41:35,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:41:35,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:41:35,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:41:35,185 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:41:35,187 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:41:35,187 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /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 -> 31d0c4253184c01eb9f9573658b07bed7aa94585 [2020-10-19 18:41:35,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:41:35,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:41:35,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:41:35,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:41:35,546 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:41:35,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2020-10-19 18:41:35,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d15c7a2/6e2021e09ab447329ef98571afe61f6b/FLAG66e399a02 [2020-10-19 18:41:36,044 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:41:36,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2020-10-19 18:41:36,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d15c7a2/6e2021e09ab447329ef98571afe61f6b/FLAG66e399a02 [2020-10-19 18:41:36,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d15c7a2/6e2021e09ab447329ef98571afe61f6b [2020-10-19 18:41:36,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:41:36,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:41:36,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:36,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:41:36,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:41:36,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c91dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36, skipping insertion in model container [2020-10-19 18:41:36,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:41:36,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:41:36,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:36,664 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:41:36,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:36,694 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:41:36,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36 WrapperNode [2020-10-19 18:41:36,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:36,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:36,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:41:36,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:41:36,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:36,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:41:36,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:41:36,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:41:36,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... [2020-10-19 18:41:36,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:41:36,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:41:36,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:41:36,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:41:36,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:41:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:41:37,025 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:41:37,025 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 18:41:37,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:37 BoogieIcfgContainer [2020-10-19 18:41:37,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:41:37,028 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:41:37,028 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:41:37,031 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:41:37,032 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:37,032 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:41:36" (1/3) ... [2020-10-19 18:41:37,033 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@686147bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:37, skipping insertion in model container [2020-10-19 18:41:37,033 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:37,034 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:36" (2/3) ... [2020-10-19 18:41:37,034 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@686147bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:37, skipping insertion in model container [2020-10-19 18:41:37,034 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:37,034 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:37" (3/3) ... [2020-10-19 18:41:37,036 INFO L373 chiAutomizerObserver]: Analyzing ICFG Urban-WST2013-Fig2.c [2020-10-19 18:41:37,092 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:41:37,092 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:41:37,092 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:41:37,093 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:41:37,093 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:41:37,093 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:41:37,093 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:41:37,093 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:41:37,109 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-19 18:41:37,132 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:41:37,132 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:37,132 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:37,138 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:37,138 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:41:37,138 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:41:37,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-19 18:41:37,140 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:41:37,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:37,140 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:37,140 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:37,140 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:41:37,147 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L19-2true [2020-10-19 18:41:37,147 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 9#L21-2true assume !(main_~x2~0 > 1); 8#L21-3true main_~x1~0 := 1 + main_~x1~0; 6#L19-2true [2020-10-19 18:41:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-19 18:41:37,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918578777] [2020-10-19 18:41:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,241 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,246 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,265 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-10-19 18:41:37,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713570621] [2020-10-19 18:41:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:37,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713570621] [2020-10-19 18:41:37,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:41:37,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:41:37,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522880234] [2020-10-19 18:41:37,341 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:37,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:37,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:41:37,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:41:37,363 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-10-19 18:41:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:37,385 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-10-19 18:41:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:41:37,388 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-10-19 18:41:37,390 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:41:37,394 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2020-10-19 18:41:37,395 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-10-19 18:41:37,396 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-10-19 18:41:37,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2020-10-19 18:41:37,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:37,397 INFO L691 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-10-19 18:41:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2020-10-19 18:41:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-10-19 18:41:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 18:41:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2020-10-19 18:41:37,435 INFO L714 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-10-19 18:41:37,435 INFO L594 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-10-19 18:41:37,435 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:41:37,435 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2020-10-19 18:41:37,436 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:41:37,436 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:37,436 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:37,437 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:37,437 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:41:37,437 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L19-2 [2020-10-19 18:41:37,437 INFO L796 eck$LassoCheckResult]: Loop: 27#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 28#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 30#L21-2 assume !(main_~x2~0 > 1); 29#L21-3 main_~x1~0 := 1 + main_~x1~0; 27#L19-2 [2020-10-19 18:41:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-10-19 18:41:37,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817348118] [2020-10-19 18:41:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,444 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,448 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2020-10-19 18:41:37,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598822982] [2020-10-19 18:41:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:37,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598822982] [2020-10-19 18:41:37,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721843237] [2020-10-19 18:41:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:37,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:41:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:37,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:37,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-10-19 18:41:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534504058] [2020-10-19 18:41:37,608 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:41:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:41:37,610 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 4 states. [2020-10-19 18:41:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:37,632 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2020-10-19 18:41:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:41:37,634 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2020-10-19 18:41:37,634 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 18:41:37,635 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2020-10-19 18:41:37,635 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-10-19 18:41:37,635 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-10-19 18:41:37,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2020-10-19 18:41:37,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:37,636 INFO L691 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-10-19 18:41:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2020-10-19 18:41:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-10-19 18:41:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:41:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-10-19 18:41:37,638 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-10-19 18:41:37,639 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-10-19 18:41:37,639 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:41:37,639 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-10-19 18:41:37,640 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 18:41:37,640 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:37,640 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:37,640 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:37,641 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2020-10-19 18:41:37,641 INFO L794 eck$LassoCheckResult]: Stem: 53#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 54#L19-2 [2020-10-19 18:41:37,641 INFO L796 eck$LassoCheckResult]: Loop: 54#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 55#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 57#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 58#L21-2 assume !(main_~x2~0 > 1); 56#L21-3 main_~x1~0 := 1 + main_~x1~0; 54#L19-2 [2020-10-19 18:41:37,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,642 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2020-10-19 18:41:37,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133067534] [2020-10-19 18:41:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,648 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,650 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,651 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2020-10-19 18:41:37,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410329867] [2020-10-19 18:41:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:37,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410329867] [2020-10-19 18:41:37,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570457144] [2020-10-19 18:41:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:41:37,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:41:37,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:37,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:37,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:37,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:37,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-10-19 18:41:37,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068975341] [2020-10-19 18:41:37,745 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:37,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:37,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:41:37,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:41:37,746 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 5 states. [2020-10-19 18:41:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:37,778 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2020-10-19 18:41:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:41:37,779 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2020-10-19 18:41:37,780 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-19 18:41:37,780 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2020-10-19 18:41:37,780 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-19 18:41:37,781 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-19 18:41:37,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-10-19 18:41:37,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:37,781 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-19 18:41:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-10-19 18:41:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-19 18:41:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 18:41:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-10-19 18:41:37,783 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-19 18:41:37,783 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-19 18:41:37,783 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:41:37,783 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2020-10-19 18:41:37,784 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-19 18:41:37,784 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:37,784 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:37,785 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:37,785 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2020-10-19 18:41:37,785 INFO L794 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 87#L19-2 [2020-10-19 18:41:37,785 INFO L796 eck$LassoCheckResult]: Loop: 87#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 88#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 90#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 92#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 91#L21-2 assume !(main_~x2~0 > 1); 89#L21-3 main_~x1~0 := 1 + main_~x1~0; 87#L19-2 [2020-10-19 18:41:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,786 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2020-10-19 18:41:37,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195945828] [2020-10-19 18:41:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,790 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,793 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2020-10-19 18:41:37,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536675806] [2020-10-19 18:41:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:37,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536675806] [2020-10-19 18:41:37,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304756970] [2020-10-19 18:41:37,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:37,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 18:41:37,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:41:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:41:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:37,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:37,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-19 18:41:37,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252365462] [2020-10-19 18:41:37,891 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:37,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:41:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:41:37,892 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-10-19 18:41:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:37,921 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-10-19 18:41:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:41:37,922 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-10-19 18:41:37,923 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-19 18:41:37,923 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2020-10-19 18:41:37,923 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-19 18:41:37,924 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-19 18:41:37,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-10-19 18:41:37,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:37,925 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-19 18:41:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-10-19 18:41:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-19 18:41:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 18:41:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-10-19 18:41:37,927 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-19 18:41:37,927 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-19 18:41:37,927 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 18:41:37,927 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-10-19 18:41:37,928 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-19 18:41:37,928 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:37,928 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:37,929 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:37,929 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2020-10-19 18:41:37,930 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 126#L19-2 [2020-10-19 18:41:37,930 INFO L796 eck$LassoCheckResult]: Loop: 126#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 127#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 129#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 132#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 131#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 130#L21-2 assume !(main_~x2~0 > 1); 128#L21-3 main_~x1~0 := 1 + main_~x1~0; 126#L19-2 [2020-10-19 18:41:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,930 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2020-10-19 18:41:37,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683209772] [2020-10-19 18:41:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:37,938 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:37,942 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2020-10-19 18:41:37,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:37,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995482285] [2020-10-19 18:41:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995482285] [2020-10-19 18:41:38,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197080113] [2020-10-19 18:41:38,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:38,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:41:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:41:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:41:38,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:38,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-19 18:41:38,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660473826] [2020-10-19 18:41:38,111 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:38,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:38,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:41:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:41:38,113 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 7 states. [2020-10-19 18:41:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:38,134 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-10-19 18:41:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:41:38,135 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-10-19 18:41:38,135 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:41:38,136 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2020-10-19 18:41:38,136 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-10-19 18:41:38,136 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-10-19 18:41:38,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2020-10-19 18:41:38,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:38,137 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-19 18:41:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2020-10-19 18:41:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-19 18:41:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-19 18:41:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-10-19 18:41:38,139 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-19 18:41:38,139 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-19 18:41:38,140 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 18:41:38,140 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2020-10-19 18:41:38,140 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:41:38,141 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:38,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:38,141 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:38,142 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2020-10-19 18:41:38,142 INFO L794 eck$LassoCheckResult]: Stem: 170#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 171#L19-2 [2020-10-19 18:41:38,142 INFO L796 eck$LassoCheckResult]: Loop: 171#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 172#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 174#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 178#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 177#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 176#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 175#L21-2 assume !(main_~x2~0 > 1); 173#L21-3 main_~x1~0 := 1 + main_~x1~0; 171#L19-2 [2020-10-19 18:41:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,143 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2020-10-19 18:41:38,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420694511] [2020-10-19 18:41:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,147 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,150 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2020-10-19 18:41:38,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290827911] [2020-10-19 18:41:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290827911] [2020-10-19 18:41:38,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786826765] [2020-10-19 18:41:38,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:41:38,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-19 18:41:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:41:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:41:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:38,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-19 18:41:38,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914069080] [2020-10-19 18:41:38,270 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:38,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:41:38,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:41:38,271 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 8 states. [2020-10-19 18:41:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:38,297 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2020-10-19 18:41:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:41:38,298 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2020-10-19 18:41:38,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-19 18:41:38,299 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2020-10-19 18:41:38,299 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-10-19 18:41:38,299 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-10-19 18:41:38,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2020-10-19 18:41:38,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:38,300 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-10-19 18:41:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2020-10-19 18:41:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-19 18:41:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 18:41:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-10-19 18:41:38,302 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-10-19 18:41:38,303 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-10-19 18:41:38,303 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 18:41:38,303 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2020-10-19 18:41:38,304 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-19 18:41:38,304 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:38,304 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:38,305 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:38,305 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2020-10-19 18:41:38,305 INFO L794 eck$LassoCheckResult]: Stem: 221#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 222#L19-2 [2020-10-19 18:41:38,305 INFO L796 eck$LassoCheckResult]: Loop: 222#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 223#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 225#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 230#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 229#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 228#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 227#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 226#L21-2 assume !(main_~x2~0 > 1); 224#L21-3 main_~x1~0 := 1 + main_~x1~0; 222#L19-2 [2020-10-19 18:41:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,306 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2020-10-19 18:41:38,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994751386] [2020-10-19 18:41:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,311 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,312 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,313 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2020-10-19 18:41:38,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627017202] [2020-10-19 18:41:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627017202] [2020-10-19 18:41:38,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731348370] [2020-10-19 18:41:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:41:38,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-19 18:41:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:41:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:41:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:38,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-19 18:41:38,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293789171] [2020-10-19 18:41:38,442 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:41:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:41:38,443 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 9 states. [2020-10-19 18:41:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:38,463 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-10-19 18:41:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:41:38,464 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2020-10-19 18:41:38,465 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 18:41:38,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2020-10-19 18:41:38,466 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-10-19 18:41:38,466 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-19 18:41:38,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-10-19 18:41:38,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:38,467 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-19 18:41:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-10-19 18:41:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-19 18:41:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-19 18:41:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-19 18:41:38,469 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-19 18:41:38,469 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-19 18:41:38,470 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 18:41:38,470 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2020-10-19 18:41:38,470 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 18:41:38,471 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:38,471 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:38,471 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:38,472 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2020-10-19 18:41:38,472 INFO L794 eck$LassoCheckResult]: Stem: 278#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 279#L19-2 [2020-10-19 18:41:38,472 INFO L796 eck$LassoCheckResult]: Loop: 279#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 280#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 282#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 288#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 287#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 286#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 285#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 284#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 283#L21-2 assume !(main_~x2~0 > 1); 281#L21-3 main_~x1~0 := 1 + main_~x1~0; 279#L19-2 [2020-10-19 18:41:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2020-10-19 18:41:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339722699] [2020-10-19 18:41:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,477 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,479 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,480 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2020-10-19 18:41:38,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269830685] [2020-10-19 18:41:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269830685] [2020-10-19 18:41:38,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64938312] [2020-10-19 18:41:38,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:41:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:38,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:41:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:38,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-19 18:41:38,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404124042] [2020-10-19 18:41:38,635 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:38,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:38,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:41:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:41:38,637 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 10 states. [2020-10-19 18:41:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:38,662 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-10-19 18:41:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:41:38,663 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2020-10-19 18:41:38,664 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-10-19 18:41:38,665 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2020-10-19 18:41:38,665 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-10-19 18:41:38,665 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-10-19 18:41:38,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2020-10-19 18:41:38,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:38,666 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-19 18:41:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2020-10-19 18:41:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-19 18:41:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 18:41:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-19 18:41:38,668 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-19 18:41:38,668 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-19 18:41:38,668 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-19 18:41:38,668 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2020-10-19 18:41:38,669 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-10-19 18:41:38,670 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:38,670 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:38,670 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:38,670 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2020-10-19 18:41:38,671 INFO L794 eck$LassoCheckResult]: Stem: 341#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 342#L19-2 [2020-10-19 18:41:38,671 INFO L796 eck$LassoCheckResult]: Loop: 342#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 343#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 345#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 352#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 351#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 350#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 349#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 348#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 347#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 346#L21-2 assume !(main_~x2~0 > 1); 344#L21-3 main_~x1~0 := 1 + main_~x1~0; 342#L19-2 [2020-10-19 18:41:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2020-10-19 18:41:38,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591944336] [2020-10-19 18:41:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,678 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,679 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2020-10-19 18:41:38,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702701309] [2020-10-19 18:41:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702701309] [2020-10-19 18:41:38,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215755397] [2020-10-19 18:41:38,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:41:38,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:41:38,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:41:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:41:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:38,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:38,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-19 18:41:38,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121813774] [2020-10-19 18:41:38,828 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:41:38,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:41:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:41:38,829 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 11 states. [2020-10-19 18:41:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:38,859 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-10-19 18:41:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:41:38,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-10-19 18:41:38,861 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-10-19 18:41:38,861 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2020-10-19 18:41:38,861 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-10-19 18:41:38,861 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-10-19 18:41:38,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2020-10-19 18:41:38,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:38,862 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-19 18:41:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2020-10-19 18:41:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-19 18:41:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-19 18:41:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-19 18:41:38,864 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-19 18:41:38,865 INFO L594 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-19 18:41:38,865 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-19 18:41:38,865 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2020-10-19 18:41:38,865 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-10-19 18:41:38,866 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:38,866 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:38,867 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:38,867 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2020-10-19 18:41:38,867 INFO L794 eck$LassoCheckResult]: Stem: 410#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 411#L19-2 [2020-10-19 18:41:38,867 INFO L796 eck$LassoCheckResult]: Loop: 411#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 412#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 414#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 422#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 421#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 420#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 419#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 418#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 417#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 416#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 415#L21-2 assume !(main_~x2~0 > 1); 413#L21-3 main_~x1~0 := 1 + main_~x1~0; 411#L19-2 [2020-10-19 18:41:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2020-10-19 18:41:38,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003608995] [2020-10-19 18:41:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,872 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2020-10-19 18:41:38,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649279184] [2020-10-19 18:41:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,895 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2020-10-19 18:41:38,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:38,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002710311] [2020-10-19 18:41:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,905 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:38,912 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:38,915 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:39,039 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:39,039 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:39,040 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:39,040 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:39,040 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:39,040 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,040 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:39,040 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:39,041 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2020-10-19 18:41:39,041 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:39,041 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:39,056 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,151 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:39,152 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:39,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:39,163 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,176 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:39,176 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:39,218 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:39,218 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,224 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:39,224 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:39,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:39,271 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,312 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:39,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:39,354 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:39,356 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:39,357 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:39,357 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:39,357 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:39,357 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:39,357 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,357 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:39,357 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:39,358 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2020-10-19 18:41:39,358 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:39,358 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:39,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,428 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:39,434 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,444 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:39,447 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:39,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:39,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:39,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:39,453 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:39,453 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:39,459 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,498 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:39,500 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:39,501 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:39,501 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:39,501 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:39,506 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:39,506 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:39,511 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,539 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:39,541 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:39,541 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:39,542 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:39,542 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:39,542 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:39,543 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:39,543 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:41:39,545 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:39,555 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:39,555 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,562 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:39,562 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:39,563 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:39,563 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x1~0) = -2*ULTIMATE.start_main_~x1~0 + 21 Supporting invariants [] [2020-10-19 18:41:39,608 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:39,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-19 18:41:39,684 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 [2020-10-19 18:41:39,685 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-10-19 18:41:39,725 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 25 states and 28 transitions. Complement of second has 4 states. [2020-10-19 18:41:39,726 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 [2020-10-19 18:41:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:41:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-19 18:41:39,729 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2020-10-19 18:41:39,730 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:39,730 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2020-10-19 18:41:39,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:39,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2020-10-19 18:41:39,732 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:39,732 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2020-10-19 18:41:39,734 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:39,734 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2020-10-19 18:41:39,735 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-10-19 18:41:39,735 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-10-19 18:41:39,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2020-10-19 18:41:39,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:39,736 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-19 18:41:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2020-10-19 18:41:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2020-10-19 18:41:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 18:41:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-19 18:41:39,738 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-19 18:41:39,738 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-19 18:41:39,739 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-19 18:41:39,739 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2020-10-19 18:41:39,739 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:39,740 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:39,740 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:39,740 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:41:39,741 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:41:39,741 INFO L794 eck$LassoCheckResult]: Stem: 507#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 508#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 510#L21-2 [2020-10-19 18:41:39,741 INFO L796 eck$LassoCheckResult]: Loop: 510#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 510#L21-2 [2020-10-19 18:41:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-19 18:41:39,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:39,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030156119] [2020-10-19 18:41:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:39,747 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:39,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:39,750 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-10-19 18:41:39,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:39,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687176018] [2020-10-19 18:41:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:39,756 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:39,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:39,758 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:39,759 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-10-19 18:41:39,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:39,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019633225] [2020-10-19 18:41:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:39,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:39,766 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:39,767 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:39,827 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:39,828 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:39,828 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:39,828 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:39,828 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:39,828 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,828 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:39,828 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:39,829 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2020-10-19 18:41:39,829 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:39,829 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:39,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:39,948 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:39,948 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:39,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:39,955 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:39,959 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:39,960 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,000 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:40,000 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:40,004 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:40,004 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,049 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:40,049 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,096 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:40,096 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,134 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:40,137 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:40,137 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:40,137 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:40,137 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:40,138 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:40,138 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,138 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:40,138 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:40,138 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2020-10-19 18:41:40,138 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:40,138 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:40,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,192 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:40,192 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,214 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,216 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:40,216 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:40,216 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:40,216 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:40,219 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:40,219 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:40,224 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,272 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:40,274 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:40,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:40,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:40,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:40,277 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:40,277 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:40,282 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,318 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:40,319 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:40,320 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:40,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:40,320 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:40,320 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:40,321 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:40,321 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:41:40,324 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,331 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 18:41:40,331 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,347 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:40,347 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:40,347 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:40,347 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,371 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:40,400 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:41:40,400 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 2 states. [2020-10-19 18:41:40,410 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 31 states and 36 transitions. Complement of second has 5 states. [2020-10-19 18:41:40,410 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 [2020-10-19 18:41:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-19 18:41:40,411 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2020-10-19 18:41:40,411 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,411 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2020-10-19 18:41:40,411 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,412 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-10-19 18:41:40,412 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,412 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2020-10-19 18:41:40,413 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:40,414 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2020-10-19 18:41:40,414 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-10-19 18:41:40,414 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-10-19 18:41:40,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2020-10-19 18:41:40,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:40,414 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-19 18:41:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2020-10-19 18:41:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2020-10-19 18:41:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 18:41:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-19 18:41:40,417 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-19 18:41:40,417 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-19 18:41:40,417 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-10-19 18:41:40,417 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2020-10-19 18:41:40,417 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:40,417 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:40,417 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:40,418 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2020-10-19 18:41:40,418 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:41:40,418 INFO L794 eck$LassoCheckResult]: Stem: 582#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 583#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 584#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 588#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 596#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 595#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 594#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 593#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 592#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 591#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 590#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 589#L21-2 assume !(main_~x2~0 > 1); 587#L21-3 main_~x1~0 := 1 + main_~x1~0; 585#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 586#L21-2 [2020-10-19 18:41:40,418 INFO L796 eck$LassoCheckResult]: Loop: 586#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 586#L21-2 [2020-10-19 18:41:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:40,419 INFO L82 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2020-10-19 18:41:40,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:40,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149054682] [2020-10-19 18:41:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:40,428 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:40,434 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:40,436 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-10-19 18:41:40,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:40,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382696871] [2020-10-19 18:41:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:40,440 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:40,441 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:40,442 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2020-10-19 18:41:40,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:40,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79261389] [2020-10-19 18:41:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:40,450 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:40,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:40,459 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:40,471 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:40,471 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:40,471 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:40,471 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:40,471 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:40,472 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,472 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:40,472 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:40,472 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2020-10-19 18:41:40,472 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:40,472 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:40,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,525 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:40,525 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:40,539 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,543 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:40,543 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,593 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:40,594 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,635 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:40,635 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,672 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:40,675 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:40,675 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:40,675 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:40,675 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:40,675 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:40,676 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,676 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:40,676 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:40,676 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2020-10-19 18:41:40,676 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:40,676 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:40,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:40,725 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:40,725 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,729 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:40,730 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:40,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:40,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:40,731 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:40,733 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:40,733 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,740 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,776 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:40,778 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:40,778 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:40,778 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:40,778 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:40,779 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:40,780 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:40,780 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,783 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:40,785 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 18:41:40,786 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:40,789 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:40,789 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:40,789 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:40,789 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:40,810 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:40,849 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:41:40,849 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-10-19 18:41:40,858 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-10-19 18:41:40,859 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 [2020-10-19 18:41:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-19 18:41:40,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-10-19 18:41:40,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,860 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:41:40,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:40,889 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:41:40,889 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-10-19 18:41:40,898 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-10-19 18:41:40,899 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 [2020-10-19 18:41:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-19 18:41:40,899 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-10-19 18:41:40,899 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,899 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:41:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:40,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:40,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:40,929 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 1 loop predicates [2020-10-19 18:41:40,929 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-10-19 18:41:40,941 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 18 states and 20 transitions. Complement of second has 4 states. [2020-10-19 18:41:40,942 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 [2020-10-19 18:41:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-10-19 18:41:40,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2020-10-19 18:41:40,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2020-10-19 18:41:40,945 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2020-10-19 18:41:40,945 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:40,945 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2020-10-19 18:41:40,946 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:41:40,946 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2020-10-19 18:41:40,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 18:41:40,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 18:41:40,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 18:41:40,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:40,946 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:40,947 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:40,947 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:40,947 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-10-19 18:41:40,947 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:41:40,947 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:41:40,947 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 18:41:40,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:41:40 BoogieIcfgContainer [2020-10-19 18:41:40,955 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:41:40,955 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:41:40,955 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:41:40,956 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:41:40,956 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:37" (3/4) ... [2020-10-19 18:41:40,960 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:41:40,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:41:40,962 INFO L168 Benchmark]: Toolchain (without parser) took 4512.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.0 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -137.2 MB). Peak memory consumption was 67.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:40,963 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:40,963 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:40,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 1.0 GB. Free memory is still 943.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:40,964 INFO L168 Benchmark]: Boogie Preprocessor took 76.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:40,965 INFO L168 Benchmark]: RCFGBuilder took 222.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:40,965 INFO L168 Benchmark]: BuchiAutomizer took 3927.26 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.3 MB). Peak memory consumption was 91.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:40,965 INFO L168 Benchmark]: Witness Printer took 4.66 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:40,968 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 239.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 1.0 GB. Free memory is still 943.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 76.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 222.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3927.26 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.3 MB). Peak memory consumption was 91.7 MB. Max. memory is 11.5 GB. * Witness Printer took 4.66 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * x1 + 21 and consists of 3 locations. One deterministic module has affine ranking function x2 and consists of 3 locations. One nondeterministic module has affine ranking function x2 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.8s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 3.1s. Construction of modules took 0.1s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 50 SDs, 0 SdLazy, 157 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf98 lsp42 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 23ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...