./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-invgen/nested6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/loop-invgen/nested6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash b3a725921be8310e882457f7f33c9ff7dbee0bc2 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:13:08,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 19:13:08,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 19:13:08,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 19:13:08,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 19:13:08,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 19:13:08,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 19:13:08,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 19:13:08,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 19:13:08,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 19:13:08,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 19:13:08,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 19:13:08,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 19:13:08,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 19:13:08,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 19:13:08,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 19:13:08,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 19:13:08,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 19:13:08,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 19:13:08,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 19:13:08,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 19:13:08,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 19:13:08,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 19:13:08,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 19:13:08,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 19:13:08,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 19:13:08,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 19:13:08,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 19:13:08,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 19:13:08,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 19:13:08,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 19:13:08,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 19:13:08,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 19:13:08,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 19:13:08,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 19:13:08,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 19:13:08,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 19:13:08,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 19:13:08,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 19:13:08,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 19:13:08,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 19:13:08,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 19:13:08,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 19:13:08,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 19:13:08,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 19:13:08,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 19:13:08,581 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 19:13:08,582 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 19:13:08,582 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 19:13:08,582 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 19:13:08,583 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 19:13:08,583 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 19:13:08,584 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 19:13:08,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 19:13:08,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 19:13:08,585 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 19:13:08,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 19:13:08,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 19:13:08,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 19:13:08,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 19:13:08,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 19:13:08,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 19:13:08,587 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 19:13:08,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 19:13:08,588 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 19:13:08,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 19:13:08,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 19:13:08,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 19:13:08,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 19:13:08,589 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 19:13:08,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 19:13:08,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 19:13:08,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 19:13:08,590 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 19:13:08,592 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 19:13:08,592 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2020-10-19 19:13:08,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 19:13:08,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 19:13:08,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 19:13:08,916 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 19:13:08,917 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 19:13:08,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested6.i [2020-10-19 19:13:08,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a1de022/c503a8158e634859ac9bfb3185474c74/FLAGebd75e6df [2020-10-19 19:13:09,362 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 19:13:09,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i [2020-10-19 19:13:09,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a1de022/c503a8158e634859ac9bfb3185474c74/FLAGebd75e6df [2020-10-19 19:13:09,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a1de022/c503a8158e634859ac9bfb3185474c74 [2020-10-19 19:13:09,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 19:13:09,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 19:13:09,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 19:13:09,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 19:13:09,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 19:13:09,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 07:13:09" (1/1) ... [2020-10-19 19:13:09,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a14673a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:09, skipping insertion in model container [2020-10-19 19:13:09,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 07:13:09" (1/1) ... [2020-10-19 19:13:09,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 19:13:09,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 19:13:10,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 19:13:10,029 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 19:13:10,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 19:13:10,085 INFO L208 MainTranslator]: Completed translation [2020-10-19 19:13:10,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10 WrapperNode [2020-10-19 19:13:10,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 19:13:10,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 19:13:10,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 19:13:10,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 19:13:10,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 19:13:10,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 19:13:10,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 19:13:10,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 19:13:10,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (1/1) ... [2020-10-19 19:13:10,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 19:13:10,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 19:13:10,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 19:13:10,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 19:13:10,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (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 19:13:10,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 19:13:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 19:13:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 19:13:10,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 19:13:10,726 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 19:13:10,727 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-10-19 19:13:10,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:10 BoogieIcfgContainer [2020-10-19 19:13:10,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 19:13:10,730 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 19:13:10,730 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 19:13:10,734 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 19:13:10,734 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:10,734 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 07:13:09" (1/3) ... [2020-10-19 19:13:10,736 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@a884ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 07:13:10, skipping insertion in model container [2020-10-19 19:13:10,736 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:10,736 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:10" (2/3) ... [2020-10-19 19:13:10,736 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@a884ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 07:13:10, skipping insertion in model container [2020-10-19 19:13:10,736 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:10,737 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:10" (3/3) ... [2020-10-19 19:13:10,738 INFO L373 chiAutomizerObserver]: Analyzing ICFG nested6.i [2020-10-19 19:13:10,792 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 19:13:10,793 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 19:13:10,793 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 19:13:10,793 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 19:13:10,793 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 19:13:10,793 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 19:13:10,794 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 19:13:10,794 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 19:13:10,811 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states. [2020-10-19 19:13:10,835 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-19 19:13:10,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:10,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:10,843 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 19:13:10,843 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:10,843 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 19:13:10,843 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states. [2020-10-19 19:13:10,846 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-19 19:13:10,846 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:10,846 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:10,847 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 19:13:10,847 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:10,855 INFO L794 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 10#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 22#L28true assume !!(main_~n~0 < 1000000); 8#L29true assume main_~k~0 == main_~n~0; 6#L29-1true main_~i~0 := 0; 9#L33-3true [2020-10-19 19:13:10,855 INFO L796 eck$LassoCheckResult]: Loop: 9#L33-3true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 13#L34-2true assume !true; 27#L33-2true main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 9#L33-3true [2020-10-19 19:13:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 1 times [2020-10-19 19:13:10,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:10,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683877419] [2020-10-19 19:13:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:10,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:10,993 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:11,017 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash 54167, now seen corresponding path program 1 times [2020-10-19 19:13:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:11,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621498300] [2020-10-19 19:13:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:11,053 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 19:13:11,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621498300] [2020-10-19 19:13:11,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 19:13:11,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 19:13:11,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353923151] [2020-10-19 19:13:11,062 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 19:13:11,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 19:13:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 19:13:11,083 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-19 19:13:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:11,092 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-10-19 19:13:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 19:13:11,094 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 31 transitions. [2020-10-19 19:13:11,096 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-10-19 19:13:11,101 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 16 states and 19 transitions. [2020-10-19 19:13:11,102 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-10-19 19:13:11,103 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-10-19 19:13:11,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 19 transitions. [2020-10-19 19:13:11,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:11,104 INFO L691 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-19 19:13:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 19 transitions. [2020-10-19 19:13:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 19:13:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 19:13:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-19 19:13:11,130 INFO L714 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-19 19:13:11,130 INFO L594 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-19 19:13:11,130 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 19:13:11,130 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 19 transitions. [2020-10-19 19:13:11,131 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-10-19 19:13:11,132 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:11,132 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:11,132 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 19:13:11,132 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:11,133 INFO L794 eck$LassoCheckResult]: Stem: 76#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 73#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 67#L28 assume !!(main_~n~0 < 1000000); 68#L29 assume main_~k~0 == main_~n~0; 69#L29-1 main_~i~0 := 0; 70#L33-3 [2020-10-19 19:13:11,133 INFO L796 eck$LassoCheckResult]: Loop: 70#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 72#L34-2 assume !(main_~j~0 < main_~n~0); 74#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 70#L33-3 [2020-10-19 19:13:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 2 times [2020-10-19 19:13:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:11,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995538682] [2020-10-19 19:13:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:11,146 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:11,157 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:11,162 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:11,162 INFO L82 PathProgramCache]: Analyzing trace with hash 51904, now seen corresponding path program 1 times [2020-10-19 19:13:11,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:11,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113984349] [2020-10-19 19:13:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:11,169 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:11,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:11,176 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:11,176 INFO L82 PathProgramCache]: Analyzing trace with hash 177631353, now seen corresponding path program 1 times [2020-10-19 19:13:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:11,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121600387] [2020-10-19 19:13:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:11,234 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 19:13:11,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121600387] [2020-10-19 19:13:11,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 19:13:11,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 19:13:11,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537874572] [2020-10-19 19:13:11,277 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:11,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:11,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:11,279 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:11,279 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:11,279 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:11,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:11,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2020-10-19 19:13:11,280 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:11,280 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:11,301 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 19:13:11,310 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 19:13:11,382 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:11,383 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:11,391 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:11,392 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,406 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:11,406 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:11,431 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:11,464 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:11,702 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:11,705 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:11,705 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:11,705 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:11,705 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:11,705 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:11,705 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,705 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:11,706 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:11,706 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2020-10-19 19:13:11,706 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:11,706 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:11,707 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 19:13:11,711 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 19:13:11,765 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:11,771 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:11,793 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 19:13:11,796 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:11,796 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:11,797 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:11,797 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:11,797 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:11,800 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:11,801 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,807 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:11,854 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 19:13:11,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:11,857 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:11,857 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:11,858 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:11,858 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:11,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:11,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,867 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:11,878 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-19 19:13:11,879 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:11,894 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:11,895 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:11,895 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:11,896 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:11,933 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:11,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:12,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:12,016 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 19:13:12,020 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 19:13:12,021 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 19:13:12,087 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 28 states and 36 transitions. Complement of second has 4 states. [2020-10-19 19:13:12,088 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 19:13:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 19 transitions. [2020-10-19 19:13:12,092 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 3 letters. [2020-10-19 19:13:12,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:12,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-19 19:13:12,094 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:12,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 6 letters. [2020-10-19 19:13:12,095 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:12,095 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 36 transitions. [2020-10-19 19:13:12,097 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-19 19:13:12,098 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 27 states and 34 transitions. [2020-10-19 19:13:12,098 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-10-19 19:13:12,099 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-10-19 19:13:12,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 34 transitions. [2020-10-19 19:13:12,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:12,100 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-19 19:13:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 34 transitions. [2020-10-19 19:13:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-19 19:13:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-19 19:13:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-19 19:13:12,104 INFO L714 BuchiCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-19 19:13:12,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:12,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 19:13:12,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 19:13:12,105 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 4 states. [2020-10-19 19:13:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:12,170 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-10-19 19:13:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 19:13:12,171 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2020-10-19 19:13:12,173 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-10-19 19:13:12,175 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 47 states and 59 transitions. [2020-10-19 19:13:12,175 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-10-19 19:13:12,175 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-10-19 19:13:12,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 59 transitions. [2020-10-19 19:13:12,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:12,176 INFO L691 BuchiCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-19 19:13:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 59 transitions. [2020-10-19 19:13:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-19 19:13:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 19:13:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-19 19:13:12,181 INFO L714 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-19 19:13:12,181 INFO L594 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-19 19:13:12,181 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 19:13:12,182 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 34 transitions. [2020-10-19 19:13:12,183 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-19 19:13:12,183 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:12,183 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:12,184 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-19 19:13:12,184 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 19:13:12,185 INFO L794 eck$LassoCheckResult]: Stem: 252#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 247#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 236#L28 assume !!(main_~n~0 < 1000000); 237#L29 assume main_~k~0 == main_~n~0; 238#L29-1 main_~i~0 := 0; 239#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 243#L34-2 [2020-10-19 19:13:12,185 INFO L796 eck$LassoCheckResult]: Loop: 243#L34-2 assume !!(main_~j~0 < main_~n~0); 250#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 233#L36-2 assume !(main_~k~0 < main_~n~0); 248#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 243#L34-2 [2020-10-19 19:13:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 1 times [2020-10-19 19:13:12,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:12,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236112401] [2020-10-19 19:13:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,199 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,211 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,215 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1850272, now seen corresponding path program 1 times [2020-10-19 19:13:12,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:12,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750524832] [2020-10-19 19:13:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:12,240 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 19:13:12,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750524832] [2020-10-19 19:13:12,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 19:13:12,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 19:13:12,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331569031] [2020-10-19 19:13:12,242 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 19:13:12,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 19:13:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 19:13:12,243 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. cyclomatic complexity: 9 Second operand 4 states. [2020-10-19 19:13:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:12,287 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-10-19 19:13:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 19:13:12,288 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 36 transitions. [2020-10-19 19:13:12,289 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 19:13:12,290 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 36 transitions. [2020-10-19 19:13:12,290 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-10-19 19:13:12,290 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-10-19 19:13:12,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 36 transitions. [2020-10-19 19:13:12,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:12,291 INFO L691 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-19 19:13:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 36 transitions. [2020-10-19 19:13:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-19 19:13:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 19:13:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-19 19:13:12,295 INFO L714 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-19 19:13:12,296 INFO L594 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-19 19:13:12,296 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 19:13:12,296 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 36 transitions. [2020-10-19 19:13:12,297 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 19:13:12,297 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:12,298 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:12,298 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-19 19:13:12,298 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-19 19:13:12,299 INFO L794 eck$LassoCheckResult]: Stem: 315#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 311#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 301#L28 assume !!(main_~n~0 < 1000000); 302#L29 assume main_~k~0 == main_~n~0; 303#L29-1 main_~i~0 := 0; 304#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 308#L34-2 [2020-10-19 19:13:12,299 INFO L796 eck$LassoCheckResult]: Loop: 308#L34-2 assume !!(main_~j~0 < main_~n~0); 316#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 293#L18-3 assume !(0 == __VERIFIER_assert_~cond); 294#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 318#L18-6 assume !(0 == __VERIFIER_assert_~cond); 313#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 308#L34-2 [2020-10-19 19:13:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 2 times [2020-10-19 19:13:12,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:12,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135783501] [2020-10-19 19:13:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,311 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,325 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1807888138, now seen corresponding path program 1 times [2020-10-19 19:13:12,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:12,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112702118] [2020-10-19 19:13:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,343 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,346 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash 32528759, now seen corresponding path program 1 times [2020-10-19 19:13:12,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:12,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987888535] [2020-10-19 19:13:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:12,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:12,384 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:12,441 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-19 19:13:12,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 19:13:12,489 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:12,490 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:12,490 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:12,490 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:12,490 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:12,490 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:12,491 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:12,491 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:12,491 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2020-10-19 19:13:12,491 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:12,492 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:12,493 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 19:13:12,497 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 19:13:12,508 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 19:13:12,512 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 19:13:12,576 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:12,577 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:12,581 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:12,581 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:12,593 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:12,593 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post6=0} Honda state: {ULTIMATE.start_main_#t~post6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:12,708 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:12,708 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 19:13:12,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:12,766 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 19:13:13,129 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:13,132 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:13,132 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:13,133 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:13,133 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:13,133 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:13,133 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:13,133 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:13,133 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:13,133 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2020-10-19 19:13:13,134 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:13,134 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:13,136 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 19:13:13,139 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 19:13:13,150 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 19:13:13,153 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 19:13:13,212 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:13,212 INFO L489 LassoAnalysis]: Using template 'affine'. 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 19:13:13,226 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 19:13:13,228 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:13,228 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:13,228 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:13,228 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:13,229 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:13,230 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:13,230 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 19:13:13,231 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 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:13,257 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 19:13:13,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:13,259 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:13,259 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:13,259 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:13,259 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:13,261 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:13,261 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 19:13:13,268 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:13,277 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-19 19:13:13,277 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. 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) [2020-10-19 19:13:13,288 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:13,288 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:13,288 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:13,288 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~j~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:13,313 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:13,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:13,365 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 19:13:13,366 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 19:13:13,366 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-10-19 19:13:13,397 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 72 states and 91 transitions. Complement of second has 7 states. [2020-10-19 19:13:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-19 19:13:13,398 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 6 letters. [2020-10-19 19:13:13,399 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:13,399 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 12 letters. Loop has 6 letters. [2020-10-19 19:13:13,399 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:13,399 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 12 letters. [2020-10-19 19:13:13,400 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:13,400 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 72 states and 91 transitions. [2020-10-19 19:13:13,403 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2020-10-19 19:13:13,404 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 72 states to 57 states and 72 transitions. [2020-10-19 19:13:13,404 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2020-10-19 19:13:13,404 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2020-10-19 19:13:13,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 72 transitions. [2020-10-19 19:13:13,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:13,405 INFO L691 BuchiCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-10-19 19:13:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 72 transitions. [2020-10-19 19:13:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-10-19 19:13:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 19:13:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-19 19:13:13,409 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-19 19:13:13,409 INFO L594 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-19 19:13:13,410 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 19:13:13,410 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2020-10-19 19:13:13,411 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2020-10-19 19:13:13,411 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:13,411 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:13,411 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 19:13:13,411 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:13,412 INFO L794 eck$LassoCheckResult]: Stem: 479#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 474#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 462#L28 assume !!(main_~n~0 < 1000000); 463#L29 assume main_~k~0 == main_~n~0; 464#L29-1 main_~i~0 := 0; 465#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 469#L34-2 assume !!(main_~j~0 < main_~n~0); 483#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 459#L36-2 [2020-10-19 19:13:13,412 INFO L796 eck$LassoCheckResult]: Loop: 459#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 466#L18 assume !(0 == __VERIFIER_assert_~cond); 458#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 459#L36-2 [2020-10-19 19:13:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash 177631345, now seen corresponding path program 1 times [2020-10-19 19:13:13,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:13,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800886662] [2020-10-19 19:13:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:13,422 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:13,430 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:13,438 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:13,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:13,438 INFO L82 PathProgramCache]: Analyzing trace with hash 70956, now seen corresponding path program 1 times [2020-10-19 19:13:13,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:13,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862306894] [2020-10-19 19:13:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:13,453 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:13,459 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:13,461 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:13,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:13,462 INFO L82 PathProgramCache]: Analyzing trace with hash 415731388, now seen corresponding path program 1 times [2020-10-19 19:13:13,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:13,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707282918] [2020-10-19 19:13:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:13,473 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:13,483 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:13,486 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:13,542 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:13,542 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:13,542 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:13,542 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:13,543 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:13,543 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:13,543 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:13,543 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:13,543 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2020-10-19 19:13:13,543 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:13,544 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:13,545 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 19:13:13,557 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 19:13:13,559 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 19:13:13,606 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:13,606 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 19:13:13,618 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:13,618 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:13,665 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:13,666 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:13,926 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:13,928 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:13,928 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:13,929 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:13,929 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:13,929 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:13,929 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:13,929 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:13,929 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:13,929 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2020-10-19 19:13:13,929 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:13,929 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:13,931 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 19:13:13,940 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 19:13:13,946 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 19:13:13,989 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:13,989 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-19 19:13:14,003 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 19:13:14,005 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:14,005 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:14,005 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:14,005 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:14,005 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:14,007 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:14,007 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 19:13:14,009 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:14,013 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 19:13:14,014 INFO L444 ModelExtractionUtils]: 2 out of 5 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 19:13:14,023 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:14,023 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:14,023 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:14,023 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~k~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2020-10-19 19:13:14,053 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:14,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:14,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:14,104 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 19:13:14,105 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 19:13:14,105 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15 Second operand 3 states. [2020-10-19 19:13:14,144 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15. Second operand 3 states. Result 133 states and 168 transitions. Complement of second has 7 states. [2020-10-19 19:13:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-10-19 19:13:14,145 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-19 19:13:14,146 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:14,146 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 11 letters. Loop has 3 letters. [2020-10-19 19:13:14,146 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:14,146 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 6 letters. [2020-10-19 19:13:14,147 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:14,147 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 168 transitions. [2020-10-19 19:13:14,149 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2020-10-19 19:13:14,151 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 98 states and 122 transitions. [2020-10-19 19:13:14,151 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2020-10-19 19:13:14,151 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 36 [2020-10-19 19:13:14,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 122 transitions. [2020-10-19 19:13:14,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:14,152 INFO L691 BuchiCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-10-19 19:13:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 122 transitions. [2020-10-19 19:13:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2020-10-19 19:13:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-19 19:13:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-19 19:13:14,158 INFO L714 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-19 19:13:14,158 INFO L594 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-19 19:13:14,158 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 19:13:14,159 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 84 transitions. [2020-10-19 19:13:14,159 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 19 [2020-10-19 19:13:14,160 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:14,160 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:14,161 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 19:13:14,161 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-19 19:13:14,161 INFO L794 eck$LassoCheckResult]: Stem: 713#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 709#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 696#L28 assume !!(main_~n~0 < 1000000); 697#L29 assume main_~k~0 == main_~n~0; 698#L29-1 main_~i~0 := 0; 699#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 704#L34-2 assume !!(main_~j~0 < main_~n~0); 734#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 738#L18-3 assume !(0 == __VERIFIER_assert_~cond); 737#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 736#L18-6 assume !(0 == __VERIFIER_assert_~cond); 735#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 730#L34-2 assume !(main_~j~0 < main_~n~0); 732#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 729#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 727#L34-2 [2020-10-19 19:13:14,161 INFO L796 eck$LassoCheckResult]: Loop: 727#L34-2 assume !!(main_~j~0 < main_~n~0); 722#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 723#L18-3 assume !(0 == __VERIFIER_assert_~cond); 733#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 731#L18-6 assume !(0 == __VERIFIER_assert_~cond); 728#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 727#L34-2 [2020-10-19 19:13:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1598319404, now seen corresponding path program 1 times [2020-10-19 19:13:14,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:14,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142845422] [2020-10-19 19:13:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 19:13:14,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142845422] [2020-10-19 19:13:14,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901902813] [2020-10-19 19:13:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 19:13:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 19:13:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 19:13:14,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 19:13:14,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-19 19:13:14,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770794647] [2020-10-19 19:13:14,533 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 19:13:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1807888138, now seen corresponding path program 2 times [2020-10-19 19:13:14,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:14,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808102094] [2020-10-19 19:13:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:14,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:14,558 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:14,562 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:14,589 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-19 19:13:14,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 19:13:14,653 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:14,654 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:14,654 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:14,654 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:14,654 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:14,654 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:14,654 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:14,654 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:14,654 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2020-10-19 19:13:14,655 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:14,655 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:14,656 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 19:13:14,667 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 19:13:14,669 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 19:13:14,674 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 19:13:14,735 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:14,735 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 19:13:14,741 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:14,741 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:14,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:14,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:15,106 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:15,109 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:15,109 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:15,109 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:15,109 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:15,109 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:15,109 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,109 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:15,109 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:15,110 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2020-10-19 19:13:15,110 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:15,110 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:15,112 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 19:13:15,121 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 19:13:15,126 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 19:13:15,130 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 19:13:15,178 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:15,179 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,194 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 19:13:15,195 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:15,196 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:15,196 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:15,196 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:15,196 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:15,198 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:15,198 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 19:13:15,201 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:15,208 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 19:13:15,208 INFO L444 ModelExtractionUtils]: 2 out of 5 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,215 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:15,215 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:15,215 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:15,215 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2020-10-19 19:13:15,236 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:15,288 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 19:13:15,288 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 19:13:15,289 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand 3 states. [2020-10-19 19:13:15,322 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand 3 states. Result 124 states and 156 transitions. Complement of second has 7 states. [2020-10-19 19:13:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-19 19:13:15,323 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-19 19:13:15,323 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:15,323 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 19:13:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:15,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:15,379 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 19:13:15,379 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:15,380 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand 3 states. [2020-10-19 19:13:15,404 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand 3 states. Result 124 states and 156 transitions. Complement of second has 7 states. [2020-10-19 19:13:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-19 19:13:15,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-19 19:13:15,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:15,406 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 19:13:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:15,453 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 19:13:15,453 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:15,454 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand 3 states. [2020-10-19 19:13:15,484 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand 3 states. Result 124 states and 155 transitions. Complement of second has 6 states. [2020-10-19 19:13:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2020-10-19 19:13:15,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-19 19:13:15,486 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:15,486 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 21 letters. Loop has 6 letters. [2020-10-19 19:13:15,487 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:15,487 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 12 letters. [2020-10-19 19:13:15,488 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:15,488 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 155 transitions. [2020-10-19 19:13:15,490 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-10-19 19:13:15,491 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 75 states and 93 transitions. [2020-10-19 19:13:15,492 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-10-19 19:13:15,492 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-19 19:13:15,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 93 transitions. [2020-10-19 19:13:15,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:15,493 INFO L691 BuchiCegarLoop]: Abstraction has 75 states and 93 transitions. [2020-10-19 19:13:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states and 93 transitions. [2020-10-19 19:13:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2020-10-19 19:13:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-19 19:13:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-19 19:13:15,497 INFO L714 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-19 19:13:15,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 19:13:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-19 19:13:15,498 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 12 states. [2020-10-19 19:13:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:15,594 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2020-10-19 19:13:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 19:13:15,595 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 148 states and 181 transitions. [2020-10-19 19:13:15,597 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2020-10-19 19:13:15,599 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 148 states to 144 states and 177 transitions. [2020-10-19 19:13:15,599 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2020-10-19 19:13:15,599 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2020-10-19 19:13:15,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 177 transitions. [2020-10-19 19:13:15,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:15,600 INFO L691 BuchiCegarLoop]: Abstraction has 144 states and 177 transitions. [2020-10-19 19:13:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states and 177 transitions. [2020-10-19 19:13:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 61. [2020-10-19 19:13:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-19 19:13:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-19 19:13:15,604 INFO L714 BuchiCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-19 19:13:15,605 INFO L594 BuchiCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-19 19:13:15,605 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 19:13:15,605 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 61 states and 76 transitions. [2020-10-19 19:13:15,605 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 19:13:15,606 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:15,606 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:15,606 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 19:13:15,606 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:15,606 INFO L794 eck$LassoCheckResult]: Stem: 1629#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 1625#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1613#L28 assume !!(main_~n~0 < 1000000); 1614#L29 assume main_~k~0 == main_~n~0; 1615#L29-1 main_~i~0 := 0; 1616#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 1620#L34-2 assume !!(main_~j~0 < main_~n~0); 1628#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 1631#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1618#L18 assume !(0 == __VERIFIER_assert_~cond); 1611#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 1612#L36-2 assume !(main_~k~0 < main_~n~0); 1642#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 1633#L34-2 assume !!(main_~j~0 < main_~n~0); 1632#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 1610#L36-2 [2020-10-19 19:13:15,607 INFO L796 eck$LassoCheckResult]: Loop: 1610#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1617#L18 assume !(0 == __VERIFIER_assert_~cond); 1609#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 1610#L36-2 [2020-10-19 19:13:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,607 INFO L82 PathProgramCache]: Analyzing trace with hash 951911067, now seen corresponding path program 1 times [2020-10-19 19:13:15,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:15,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909179541] [2020-10-19 19:13:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 19:13:15,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909179541] [2020-10-19 19:13:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710503559] [2020-10-19 19:13:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 19:13:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 19:13:15,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 19:13:15,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 19:13:15,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-19 19:13:15,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167871682] [2020-10-19 19:13:15,702 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 19:13:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash 70956, now seen corresponding path program 2 times [2020-10-19 19:13:15,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:15,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070380184] [2020-10-19 19:13:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,707 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,711 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,712 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:15,772 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:15,772 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:15,772 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:15,772 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:15,773 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:15,773 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,773 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:15,773 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:15,773 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2020-10-19 19:13:15,773 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:15,774 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:15,775 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 19:13:15,781 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 19:13:15,784 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 19:13:15,832 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:15,832 INFO L404 LassoAnalysis]: Checking for nontermination... 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) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,843 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:15,843 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:15,848 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:15,848 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Honda state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 19:13:15,886 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:15,886 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,889 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:15,890 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post8=0} Honda state: {ULTIMATE.start_main_#t~post8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 19:13:15,927 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:15,927 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 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 19:13:15,965 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:15,966 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 [2020-10-19 19:13:16,183 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:16,185 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:16,185 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:16,185 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:16,185 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:16,186 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:16,186 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,186 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:16,186 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:16,186 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2020-10-19 19:13:16,186 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:16,186 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:16,187 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 19:13:16,196 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 19:13:16,207 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 19:13:16,254 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:16,254 INFO L489 LassoAnalysis]: Using template 'affine'. 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 19:13:16,262 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 19:13:16,264 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:16,264 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:16,264 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:16,264 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:16,264 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:16,269 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:16,269 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,272 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,295 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 19:13:16,298 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:16,298 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:16,298 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:16,298 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:16,298 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:16,301 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:16,301 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 19:13:16,303 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:16,307 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 19:13:16,308 INFO L444 ModelExtractionUtils]: 2 out of 5 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,310 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:16,310 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:16,310 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:16,310 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~k~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2020-10-19 19:13:16,331 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,375 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 19:13:16,375 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 19:13:16,376 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21 Second operand 3 states. [2020-10-19 19:13:16,423 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21. Second operand 3 states. Result 116 states and 148 transitions. Complement of second has 7 states. [2020-10-19 19:13:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-10-19 19:13:16,425 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2020-10-19 19:13:16,425 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,425 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 19:13:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,475 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 19:13:16,475 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:16,475 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21 Second operand 3 states. [2020-10-19 19:13:16,498 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21. Second operand 3 states. Result 116 states and 148 transitions. Complement of second has 7 states. [2020-10-19 19:13:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-10-19 19:13:16,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2020-10-19 19:13:16,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,500 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 19:13:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,539 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 19:13:16,539 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:16,539 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21 Second operand 3 states. [2020-10-19 19:13:16,568 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21. Second operand 3 states. Result 95 states and 120 transitions. Complement of second has 6 states. [2020-10-19 19:13:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2020-10-19 19:13:16,569 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 3 letters. [2020-10-19 19:13:16,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 18 letters. Loop has 3 letters. [2020-10-19 19:13:16,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-19 19:13:16,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,571 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 95 states and 120 transitions. [2020-10-19 19:13:16,572 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:16,573 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 95 states to 0 states and 0 transitions. [2020-10-19 19:13:16,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 19:13:16,573 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 19:13:16,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 19:13:16,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:16,574 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:16,574 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:16,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:16,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 19:13:16,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 19:13:16,574 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 6 states. [2020-10-19 19:13:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:16,575 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-19 19:13:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 19:13:16,575 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-19 19:13:16,575 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:16,575 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 19:13:16,575 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 19:13:16,575 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 19:13:16,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 19:13:16,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:16,576 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:16,576 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:16,576 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:16,576 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 19:13:16,576 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 19:13:16,576 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:16,576 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 19:13:16,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 07:13:16 BoogieIcfgContainer [2020-10-19 19:13:16,584 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 19:13:16,585 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 19:13:16,585 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 19:13:16,585 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 19:13:16,585 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:10" (3/4) ... [2020-10-19 19:13:16,588 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 19:13:16,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 19:13:16,591 INFO L168 Benchmark]: Toolchain (without parser) took 6839.18 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 231.7 MB). Free memory was 949.2 MB in the beginning and 973.7 MB in the end (delta: -24.5 MB). Peak memory consumption was 207.3 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:16,592 INFO L168 Benchmark]: CDTParser took 0.26 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 19:13:16,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.34 ms. Allocated memory is still 1.0 GB. Free memory was 949.2 MB in the beginning and 938.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:16,596 INFO L168 Benchmark]: Boogie Procedure Inliner took 141.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 938.5 MB in the beginning and 1.2 GB in the end (delta: -221.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:16,604 INFO L168 Benchmark]: Boogie Preprocessor took 56.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:16,605 INFO L168 Benchmark]: RCFGBuilder took 440.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:16,608 INFO L168 Benchmark]: BuchiAutomizer took 5854.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 973.7 MB in the end (delta: 154.7 MB). Peak memory consumption was 222.8 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:16,608 INFO L168 Benchmark]: Witness Printer took 4.09 ms. Allocated memory is still 1.3 GB. Free memory is still 973.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 19:13:16,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 332.34 ms. Allocated memory is still 1.0 GB. Free memory was 949.2 MB in the beginning and 938.5 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 141.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 938.5 MB in the beginning and 1.2 GB in the end (delta: -221.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 56.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 440.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5854.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 973.7 MB in the end (delta: 154.7 MB). Peak memory consumption was 222.8 MB. Max. memory is 11.5 GB. * Witness Printer took 4.09 ms. Allocated memory is still 1.3 GB. Free memory is still 973.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function n + -1 * i and consists of 3 locations. One deterministic module has affine ranking function -1 * j + n and consists of 4 locations. One deterministic module has affine ranking function -1 * k + n and consists of 4 locations. One nondeterministic module has affine ranking function n + -1 * j and consists of 4 locations. One nondeterministic module has affine ranking function -1 * k + n and consists of 4 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.8s and 8 iterations. TraceHistogramMax:2. Analysis of lassos took 4.5s. Construction of modules took 0.2s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 173 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 68 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 221 SDtfs, 350 SDslu, 142 SDs, 0 SdLazy, 296 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax100 hnf98 lsp74 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq144 hnf94 smp100 dnf100 smp100 tf109 neg100 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 34ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...