./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/GCD3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/GCD3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash aae625cda61f26fa063b78c3d3a58aff5ded8a89 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 04:16:27,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 04:16:27,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 04:16:27,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 04:16:27,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 04:16:27,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 04:16:27,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 04:16:27,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 04:16:27,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 04:16:27,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 04:16:27,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 04:16:27,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 04:16:27,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 04:16:27,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 04:16:27,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 04:16:27,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 04:16:27,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 04:16:27,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 04:16:27,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 04:16:27,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 04:16:27,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 04:16:27,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 04:16:27,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 04:16:27,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 04:16:27,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 04:16:27,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 04:16:27,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 04:16:27,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 04:16:27,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 04:16:27,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 04:16:27,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 04:16:27,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 04:16:27,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 04:16:27,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 04:16:27,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 04:16:27,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 04:16:27,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 04:16:27,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 04:16:27,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 04:16:27,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 04:16:27,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 04:16:27,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-26 04:16:27,622 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 04:16:27,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 04:16:27,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 04:16:27,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 04:16:27,625 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 04:16:27,625 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-26 04:16:27,626 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-26 04:16:27,626 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-26 04:16:27,626 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-26 04:16:27,626 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-26 04:16:27,627 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-26 04:16:27,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 04:16:27,627 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 04:16:27,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 04:16:27,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 04:16:27,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-26 04:16:27,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-26 04:16:27,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-26 04:16:27,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 04:16:27,629 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-26 04:16:27,629 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 04:16:27,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-26 04:16:27,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 04:16:27,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 04:16:27,631 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-26 04:16:27,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 04:16:27,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 04:16:27,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 04:16:27,632 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-26 04:16:27,633 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-26 04:16:27,633 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aae625cda61f26fa063b78c3d3a58aff5ded8a89 [2020-10-26 04:16:28,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 04:16:28,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 04:16:28,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 04:16:28,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 04:16:28,113 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 04:16:28,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD3.c [2020-10-26 04:16:28,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c68b2774/f3ad0c88cf5b49a68882024146b0b3a8/FLAG64a854105 [2020-10-26 04:16:28,889 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 04:16:28,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD3.c [2020-10-26 04:16:28,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c68b2774/f3ad0c88cf5b49a68882024146b0b3a8/FLAG64a854105 [2020-10-26 04:16:29,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c68b2774/f3ad0c88cf5b49a68882024146b0b3a8 [2020-10-26 04:16:29,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 04:16:29,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 04:16:29,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 04:16:29,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 04:16:29,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 04:16:29,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78cc2cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29, skipping insertion in model container [2020-10-26 04:16:29,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 04:16:29,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 04:16:29,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:16:29,464 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 04:16:29,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:16:29,496 INFO L208 MainTranslator]: Completed translation [2020-10-26 04:16:29,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29 WrapperNode [2020-10-26 04:16:29,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 04:16:29,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 04:16:29,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 04:16:29,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 04:16:29,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 04:16:29,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 04:16:29,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 04:16:29,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 04:16:29,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (1/1) ... [2020-10-26 04:16:29,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 04:16:29,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 04:16:29,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 04:16:29,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 04:16:29,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (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 [2020-10-26 04:16:29,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 04:16:29,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 04:16:29,826 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 04:16:29,827 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-26 04:16:29,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:16:29 BoogieIcfgContainer [2020-10-26 04:16:29,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 04:16:29,830 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-26 04:16:29,831 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-26 04:16:29,835 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-26 04:16:29,836 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:16:29,837 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.10 04:16:29" (1/3) ... [2020-10-26 04:16:29,838 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@128e76a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:16:29, skipping insertion in model container [2020-10-26 04:16:29,838 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:16:29,839 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:16:29" (2/3) ... [2020-10-26 04:16:29,839 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@128e76a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:16:29, skipping insertion in model container [2020-10-26 04:16:29,840 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:16:29,840 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:16:29" (3/3) ... [2020-10-26 04:16:29,842 INFO L373 chiAutomizerObserver]: Analyzing ICFG GCD3.c [2020-10-26 04:16:29,907 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-26 04:16:29,908 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-26 04:16:29,908 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-26 04:16:29,908 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 04:16:29,908 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 04:16:29,909 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-26 04:16:29,909 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 04:16:29,909 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-26 04:16:29,927 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-26 04:16:29,954 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-26 04:16:29,954 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:29,955 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:29,963 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-26 04:16:29,963 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-26 04:16:29,963 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-26 04:16:29,964 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-26 04:16:29,966 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-26 04:16:29,966 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:29,966 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:29,967 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-26 04:16:29,967 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-26 04:16:29,976 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 11#L13-2true [2020-10-26 04:16:29,976 INFO L796 eck$LassoCheckResult]: Loop: 11#L13-2true assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 3#L17true assume 0 == main_~y~0;main_~y~0 := main_~y~0; 7#L21-2true assume !(main_~xtmp~0 > 0); 5#L31-2true assume !true; 4#L31-3true main_~y~0 := main_~xtmp~0; 15#L25-1true main_~x~0 := main_~tmp~0; 11#L13-2true [2020-10-26 04:16:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-26 04:16:29,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:29,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170042140] [2020-10-26 04:16:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,093 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,116 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1187012529, now seen corresponding path program 1 times [2020-10-26 04:16:30,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:30,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863782144] [2020-10-26 04:16:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863782144] [2020-10-26 04:16:30,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 04:16:30,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 04:16:30,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024844319] [2020-10-26 04:16:30,212 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-26 04:16:30,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:16:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 04:16:30,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 04:16:30,240 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-10-26 04:16:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:16:30,279 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2020-10-26 04:16:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 04:16:30,283 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 17 transitions. [2020-10-26 04:16:30,284 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-26 04:16:30,290 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 10 states and 13 transitions. [2020-10-26 04:16:30,292 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-10-26 04:16:30,292 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-10-26 04:16:30,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-10-26 04:16:30,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:16:30,294 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-26 04:16:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-10-26 04:16:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-26 04:16:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-26 04:16:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-10-26 04:16:30,333 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-26 04:16:30,333 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-26 04:16:30,333 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-26 04:16:30,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2020-10-26 04:16:30,335 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-26 04:16:30,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:30,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:30,336 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-26 04:16:30,336 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:16:30,337 INFO L794 eck$LassoCheckResult]: Stem: 39#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 40#L13-2 [2020-10-26 04:16:30,337 INFO L796 eck$LassoCheckResult]: Loop: 40#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 41#L17 assume !(0 == main_~y~0); 37#L21 assume !(main_~y~0 < 0); 38#L21-2 assume !(main_~xtmp~0 > 0); 45#L31-2 assume !(main_~xtmp~0 < 0); 42#L31-3 main_~y~0 := main_~xtmp~0; 43#L25-1 main_~x~0 := main_~tmp~0; 40#L13-2 [2020-10-26 04:16:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:30,339 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-10-26 04:16:30,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:30,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243104701] [2020-10-26 04:16:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,347 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,351 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,353 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:30,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1817939337, now seen corresponding path program 1 times [2020-10-26 04:16:30,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:30,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629660322] [2020-10-26 04:16:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:30,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629660322] [2020-10-26 04:16:30,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 04:16:30,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 04:16:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567432117] [2020-10-26 04:16:30,385 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-26 04:16:30,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:16:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 04:16:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 04:16:30,387 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-26 04:16:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:16:30,408 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-10-26 04:16:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 04:16:30,410 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2020-10-26 04:16:30,411 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-10-26 04:16:30,412 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 14 transitions. [2020-10-26 04:16:30,412 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-10-26 04:16:30,413 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-10-26 04:16:30,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 14 transitions. [2020-10-26 04:16:30,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:16:30,414 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-10-26 04:16:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 14 transitions. [2020-10-26 04:16:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 8. [2020-10-26 04:16:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-26 04:16:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-10-26 04:16:30,417 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-26 04:16:30,417 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-26 04:16:30,417 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-26 04:16:30,417 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-10-26 04:16:30,418 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-26 04:16:30,418 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:30,418 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:30,419 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-26 04:16:30,419 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:16:30,419 INFO L794 eck$LassoCheckResult]: Stem: 67#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 68#L13-2 [2020-10-26 04:16:30,420 INFO L796 eck$LassoCheckResult]: Loop: 68#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 69#L17 assume !(0 == main_~y~0); 65#L21 assume !(main_~y~0 < 0); 66#L21-2 assume main_~xtmp~0 > 0; 72#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 70#L26-3 main_~y~0 := main_~xtmp~0; 71#L25-1 main_~x~0 := main_~tmp~0; 68#L13-2 [2020-10-26 04:16:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2020-10-26 04:16:30,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:30,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791589981] [2020-10-26 04:16:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,427 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,430 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,432 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1818401082, now seen corresponding path program 1 times [2020-10-26 04:16:30,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:30,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937731660] [2020-10-26 04:16:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,455 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:30,459 INFO L82 PathProgramCache]: Analyzing trace with hash 669111751, now seen corresponding path program 1 times [2020-10-26 04:16:30,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:30,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491412954] [2020-10-26 04:16:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:30,482 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:30,485 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:30,575 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:30,576 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:30,576 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:30,576 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:30,577 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:16:30,577 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:30,577 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:30,577 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:30,578 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration3_Loop [2020-10-26 04:16:30,578 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:30,578 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:30,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:30,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:30,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:30,788 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:30,789 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) [2020-10-26 04:16:30,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:30,799 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 [2020-10-26 04:16:30,812 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:16:30,812 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:30,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:30,858 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:30,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:16:30,866 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:30,905 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:30,905 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /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) [2020-10-26 04:16:30,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:16:30,967 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:36,928 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:16:36,932 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:36,932 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:36,932 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:36,932 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:36,932 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:16:36,932 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:36,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:36,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:36,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration3_Loop [2020-10-26 04:16:36,935 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:36,935 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:36,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:36,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:36,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:37,131 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:37,139 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-26 04:16:37,149 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 [2020-10-26 04:16:37,152 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:37,153 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:37,153 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:37,153 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:37,162 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:37,162 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:37,173 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:37,219 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 [2020-10-26 04:16:37,222 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:37,223 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:37,223 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:37,224 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:37,231 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:37,233 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:37,244 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:37,290 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 [2020-10-26 04:16:37,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:37,293 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:16:37,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:37,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:37,296 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:37,302 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:16:37,303 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:37,309 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:16:37,317 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:16:37,317 INFO L444 ModelExtractionUtils]: 3 out of 6 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:37,325 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:16:37,326 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:16:37,326 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:16:37,327 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:37,376 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:16:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:37,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:16:37,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:37,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:16:37,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:37,562 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-10-26 04:16:37,563 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-10-26 04:16:37,663 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2. Second operand 6 states. Result 27 states and 32 transitions. Complement of second has 9 states. [2020-10-26 04:16:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 04:16:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 04:16:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2020-10-26 04:16:37,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 7 letters. [2020-10-26 04:16:37,677 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:37,677 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 8 letters. Loop has 7 letters. [2020-10-26 04:16:37,677 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:37,678 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 14 letters. [2020-10-26 04:16:37,679 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:37,680 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 32 transitions. [2020-10-26 04:16:37,684 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-10-26 04:16:37,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 24 states and 28 transitions. [2020-10-26 04:16:37,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-10-26 04:16:37,686 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-10-26 04:16:37,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 28 transitions. [2020-10-26 04:16:37,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:16:37,686 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-26 04:16:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 28 transitions. [2020-10-26 04:16:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-26 04:16:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-26 04:16:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-26 04:16:37,690 INFO L714 BuchiCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-26 04:16:37,690 INFO L594 BuchiCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-26 04:16:37,690 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-26 04:16:37,690 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 24 transitions. [2020-10-26 04:16:37,691 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-26 04:16:37,691 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:37,691 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:37,692 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-26 04:16:37,692 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-26 04:16:37,692 INFO L794 eck$LassoCheckResult]: Stem: 158#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 159#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 161#L17 assume !(0 == main_~y~0); 174#L21 assume !(main_~y~0 < 0); 173#L21-2 assume main_~xtmp~0 > 0; 169#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 170#L26-2 [2020-10-26 04:16:37,692 INFO L796 eck$LassoCheckResult]: Loop: 170#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 170#L26-2 [2020-10-26 04:16:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash 925834904, now seen corresponding path program 1 times [2020-10-26 04:16:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:37,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854692593] [2020-10-26 04:16:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:37,703 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:37,710 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:37,713 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash 64, now seen corresponding path program 1 times [2020-10-26 04:16:37,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:37,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902004459] [2020-10-26 04:16:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:37,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:37,722 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:37,723 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:37,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889015, now seen corresponding path program 2 times [2020-10-26 04:16:37,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:37,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707338390] [2020-10-26 04:16:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:37,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:37,740 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:37,742 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:37,810 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:37,810 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:37,810 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:37,810 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:37,811 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:16:37,811 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:37,811 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:37,811 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:37,811 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration4_Lasso [2020-10-26 04:16:37,811 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:37,811 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:37,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:37,817 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:37,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:37,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:37,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:37,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:37,954 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:37,955 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:37,958 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:37,958 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:16:37,962 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:16:37,963 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:38,013 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:38,014 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:38,022 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:16:38,022 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0=0} Honda state: {ULTIMATE.start_main_#t~nondet0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:38,063 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:38,064 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:38,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:16:38,114 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:38,289 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:16:38,292 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:38,292 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:38,292 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:38,292 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:38,292 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:16:38,292 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:38,293 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:38,293 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:38,293 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration4_Lasso [2020-10-26 04:16:38,293 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:38,293 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:38,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:38,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:38,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:38,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:38,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:38,353 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:38,493 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:38,494 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:38,503 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 [2020-10-26 04:16:38,505 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:38,505 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:38,505 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:38,506 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:38,509 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:38,509 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-26 04:16:38,513 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:38,550 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 [2020-10-26 04:16:38,552 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:38,552 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:38,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:38,553 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:38,560 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:38,561 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-26 04:16:38,575 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:16:38,585 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-26 04:16:38,585 INFO L444 ModelExtractionUtils]: 9 out of 16 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:38,590 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:38,598 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 2. [2020-10-26 04:16:38,598 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:16:38,598 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 2*ULTIMATE.start_main_~xtmp~0 + 1 Supporting invariants [1*ULTIMATE.start_main_~y~0 - 1 >= 0, 1*ULTIMATE.start_main_~xtmp~0 >= 0] [2020-10-26 04:16:38,637 INFO L297 tatePredicateManager]: 1 out of 2 supporting invariants were superfluous and have been removed [2020-10-26 04:16:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:38,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-26 04:16:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:38,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:16:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:38,792 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2020-10-26 04:16:38,792 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 24 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-10-26 04:16:38,866 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 24 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 25 states and 31 transitions. Complement of second has 6 states. [2020-10-26 04:16:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-26 04:16:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:16:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-26 04:16:38,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 1 letters. [2020-10-26 04:16:38,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:38,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 1 letters. [2020-10-26 04:16:38,869 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:38,869 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2020-10-26 04:16:38,869 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:38,869 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2020-10-26 04:16:38,871 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-26 04:16:38,872 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 29 transitions. [2020-10-26 04:16:38,873 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-10-26 04:16:38,873 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-10-26 04:16:38,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 29 transitions. [2020-10-26 04:16:38,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:16:38,873 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-26 04:16:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 29 transitions. [2020-10-26 04:16:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-26 04:16:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 04:16:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-10-26 04:16:38,877 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-10-26 04:16:38,877 INFO L594 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-10-26 04:16:38,878 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-26 04:16:38,878 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 28 transitions. [2020-10-26 04:16:38,879 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-26 04:16:38,879 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:38,879 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:38,880 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:16:38,880 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:16:38,880 INFO L794 eck$LassoCheckResult]: Stem: 260#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 261#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 275#L17 assume !(0 == main_~y~0); 278#L21 assume !(main_~y~0 < 0); 277#L21-2 assume main_~xtmp~0 > 0; 276#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 274#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 266#L26-3 [2020-10-26 04:16:38,880 INFO L796 eck$LassoCheckResult]: Loop: 266#L26-3 main_~y~0 := main_~xtmp~0; 267#L25-1 main_~x~0 := main_~tmp~0; 262#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 263#L17 assume !(0 == main_~y~0); 256#L21 assume !(main_~y~0 < 0); 257#L21-2 assume main_~xtmp~0 > 0; 270#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 266#L26-3 [2020-10-26 04:16:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889017, now seen corresponding path program 1 times [2020-10-26 04:16:38,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:38,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170213492] [2020-10-26 04:16:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:38,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:38,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:38,899 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1776384388, now seen corresponding path program 2 times [2020-10-26 04:16:38,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:38,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838147134] [2020-10-26 04:16:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:38,908 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:38,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:38,923 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1008190014, now seen corresponding path program 1 times [2020-10-26 04:16:38,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:38,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710100118] [2020-10-26 04:16:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 04:16:39,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710100118] [2020-10-26 04:16:39,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350694436] [2020-10-26 04:16:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 04:16:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-26 04:16:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 04:16:39,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 04:16:39,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-26 04:16:39,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577044176] [2020-10-26 04:16:39,233 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:39,234 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:39,234 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:39,234 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:39,234 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:16:39,234 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:39,234 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:39,234 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:39,234 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration5_Loop [2020-10-26 04:16:39,234 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:39,234 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:39,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:39,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:39,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:39,352 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:39,352 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:39,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:39,364 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:16:39,369 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:16:39,369 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:39,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:39,410 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 [2020-10-26 04:16:39,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:16:39,462 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:16:41,504 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:16:41,507 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:41,507 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:41,507 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:41,507 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:41,507 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:16:41,507 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:41,508 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:41,508 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:41,508 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration5_Loop [2020-10-26 04:16:41,508 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:41,508 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:41,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:41,513 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:41,533 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:41,638 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:41,638 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) [2020-10-26 04:16:41,654 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 [2020-10-26 04:16:41,657 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:41,658 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:41,658 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:41,658 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:41,666 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:41,666 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:41,675 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 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 [2020-10-26 04:16:41,720 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 [2020-10-26 04:16:41,723 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:41,723 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:16:41,724 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:41,724 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:41,724 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:41,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:16:41,731 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:16:41,737 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:16:41,747 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:16:41,748 INFO L444 ModelExtractionUtils]: 3 out of 6 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:41,758 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:16:41,758 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:16:41,758 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:16:41,758 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:41,801 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:16:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:41,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:16:41,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:41,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:16:41,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:41,878 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-26 04:16:41,878 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 28 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-10-26 04:16:42,037 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 28 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 58 states and 72 transitions. Complement of second has 8 states. [2020-10-26 04:16:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 04:16:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 04:16:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-10-26 04:16:42,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 7 letters. Loop has 7 letters. [2020-10-26 04:16:42,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:42,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 7 letters. [2020-10-26 04:16:42,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:42,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 7 letters. Loop has 14 letters. [2020-10-26 04:16:42,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:42,041 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 72 transitions. [2020-10-26 04:16:42,048 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-26 04:16:42,049 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 53 states and 67 transitions. [2020-10-26 04:16:42,050 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2020-10-26 04:16:42,050 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-10-26 04:16:42,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 67 transitions. [2020-10-26 04:16:42,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:16:42,050 INFO L691 BuchiCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-26 04:16:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 67 transitions. [2020-10-26 04:16:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-10-26 04:16:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 04:16:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-10-26 04:16:42,058 INFO L714 BuchiCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-10-26 04:16:42,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:16:42,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 04:16:42,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 04:16:42,059 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 8 states. [2020-10-26 04:16:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:16:42,226 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-26 04:16:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 04:16:42,227 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 60 transitions. [2020-10-26 04:16:42,229 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-26 04:16:42,230 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 31 states and 37 transitions. [2020-10-26 04:16:42,230 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-10-26 04:16:42,230 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2020-10-26 04:16:42,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 37 transitions. [2020-10-26 04:16:42,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:16:42,231 INFO L691 BuchiCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-26 04:16:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 37 transitions. [2020-10-26 04:16:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-26 04:16:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 04:16:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-26 04:16:42,235 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-26 04:16:42,235 INFO L594 BuchiCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-26 04:16:42,235 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-26 04:16:42,235 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 27 transitions. [2020-10-26 04:16:42,236 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-26 04:16:42,236 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:42,237 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:42,237 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:16:42,238 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:16:42,238 INFO L794 eck$LassoCheckResult]: Stem: 563#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 564#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 580#L17 assume !(0 == main_~y~0); 579#L21 assume !(main_~y~0 < 0); 578#L21-2 assume main_~xtmp~0 > 0; 577#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 576#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 567#L26-3 [2020-10-26 04:16:42,238 INFO L796 eck$LassoCheckResult]: Loop: 567#L26-3 main_~y~0 := main_~xtmp~0; 568#L25-1 main_~x~0 := main_~tmp~0; 565#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 566#L17 assume !(0 == main_~y~0); 561#L21 assume !(main_~y~0 < 0); 562#L21-2 assume main_~xtmp~0 > 0; 569#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 570#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 567#L26-3 [2020-10-26 04:16:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:42,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889017, now seen corresponding path program 2 times [2020-10-26 04:16:42,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:42,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216483102] [2020-10-26 04:16:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:42,246 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:42,252 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:42,254 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash -766658727, now seen corresponding path program 1 times [2020-10-26 04:16:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:42,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642981501] [2020-10-26 04:16:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:42,261 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:42,266 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:42,268 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1189119455, now seen corresponding path program 2 times [2020-10-26 04:16:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:42,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797331607] [2020-10-26 04:16:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:42,287 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:42,307 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:42,312 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:42,395 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:42,395 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:42,395 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:42,395 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:42,396 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:16:42,396 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:42,396 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:42,396 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:42,396 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration6_Loop [2020-10-26 04:16:42,396 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:42,396 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:42,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:42,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:42,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:42,517 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:42,517 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) [2020-10-26 04:16:42,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:42,524 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /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) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:42,558 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:16:42,559 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:16:48,931 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:16:48,934 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:48,934 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:48,934 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:48,935 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:48,935 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:16:48,935 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:48,935 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:48,935 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:48,935 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration6_Loop [2020-10-26 04:16:48,935 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:48,935 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:48,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:48,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:48,967 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,064 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:49,064 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-26 04:16:49,078 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 [2020-10-26 04:16:49,080 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:49,080 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:16:49,081 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:49,081 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:49,081 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:49,084 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:16:49,084 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:49,093 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:16:49,103 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:16:49,103 INFO L444 ModelExtractionUtils]: 3 out of 6 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:49,112 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:16:49,112 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:16:49,112 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:16:49,112 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:49,150 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:16:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:16:49,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:16:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 04:16:49,215 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-26 04:16:49,215 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-26 04:16:49,261 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 45 states and 54 transitions. Complement of second has 6 states. [2020-10-26 04:16:49,262 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 [2020-10-26 04:16:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 04:16:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-10-26 04:16:49,263 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 8 letters. [2020-10-26 04:16:49,263 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:49,263 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 15 letters. Loop has 8 letters. [2020-10-26 04:16:49,264 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:49,264 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 16 letters. [2020-10-26 04:16:49,264 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:49,264 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 54 transitions. [2020-10-26 04:16:49,266 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-26 04:16:49,266 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 37 states and 45 transitions. [2020-10-26 04:16:49,266 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2020-10-26 04:16:49,267 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-26 04:16:49,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 45 transitions. [2020-10-26 04:16:49,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:16:49,267 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-26 04:16:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 45 transitions. [2020-10-26 04:16:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-26 04:16:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 04:16:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-26 04:16:49,270 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-26 04:16:49,270 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-26 04:16:49,270 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-26 04:16:49,270 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2020-10-26 04:16:49,271 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-26 04:16:49,271 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:16:49,271 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:16:49,272 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-26 04:16:49,272 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-26 04:16:49,272 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 704#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 722#L17 assume !(0 == main_~y~0); 721#L21 assume !(main_~y~0 < 0); 720#L21-2 assume main_~xtmp~0 > 0; 719#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 718#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 716#L26-3 main_~y~0 := main_~xtmp~0; 712#L25-1 main_~x~0 := main_~tmp~0; 705#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 706#L17 assume !(0 == main_~y~0); 699#L21 assume !(main_~y~0 < 0); 700#L21-2 assume main_~xtmp~0 > 0; 713#L26-2 [2020-10-26 04:16:49,272 INFO L796 eck$LassoCheckResult]: Loop: 713#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 713#L26-2 [2020-10-26 04:16:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -521667071, now seen corresponding path program 3 times [2020-10-26 04:16:49,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:49,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339971168] [2020-10-26 04:16:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:49,282 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:49,289 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:49,291 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:49,292 INFO L82 PathProgramCache]: Analyzing trace with hash 64, now seen corresponding path program 2 times [2020-10-26 04:16:49,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:49,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415907861] [2020-10-26 04:16:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:49,296 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:49,297 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:49,298 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1008190016, now seen corresponding path program 4 times [2020-10-26 04:16:49,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:16:49,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612728141] [2020-10-26 04:16:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:16:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:49,312 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:16:49,333 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:16:49,339 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:16:49,494 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-10-26 04:16:49,516 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:49,516 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:49,516 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:49,516 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:49,516 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:16:49,516 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:49,516 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:49,516 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:49,517 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration7_Lasso [2020-10-26 04:16:49,517 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:49,517 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:49,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,546 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,647 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:49,647 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-26 04:16:49,654 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:49,654 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:49,659 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:16:49,659 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:49,700 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:16:49,700 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:49,748 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:16:49,748 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:49,924 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:16:49,926 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:16:49,926 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:16:49,926 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:16:49,926 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:16:49,926 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:16:49,926 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:49,926 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:16:49,926 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:16:49,926 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration7_Lasso [2020-10-26 04:16:49,927 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:16:49,927 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:16:49,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:49,944 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:16:50,047 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:16:50,047 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:50,062 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 [2020-10-26 04:16:50,063 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:50,064 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:16:50,064 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:50,064 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:50,064 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:50,065 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:16:50,065 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:50,066 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:50,090 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 [2020-10-26 04:16:50,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:50,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:16:50,092 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:50,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:50,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:50,092 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:16:50,092 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:16:50,097 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:50,122 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 [2020-10-26 04:16:50,124 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:50,124 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:50,124 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:50,124 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:50,126 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:50,127 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-26 04:16:50,131 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:50,157 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 [2020-10-26 04:16:50,158 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:50,159 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:16:50,159 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:50,159 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:50,159 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:50,159 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:16:50,159 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:16:50,161 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 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:50,185 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 [2020-10-26 04:16:50,186 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:50,187 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:50,187 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:50,187 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:16:50,189 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:50,189 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-26 04:16:50,195 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:50,232 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 [2020-10-26 04:16:50,234 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:16:50,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:16:50,235 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:16:50,235 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:50,240 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-26 04:16:50,242 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-26 04:16:50,256 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:16:50,269 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2020-10-26 04:16:50,269 INFO L444 ModelExtractionUtils]: 8 out of 16 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:16:50,276 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:16:50,282 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2020-10-26 04:16:50,282 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:16:50,282 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~xtmp~0) = -2*ULTIMATE.start_main_~y~0 + 2*ULTIMATE.start_main_~xtmp~0 + 1 Supporting invariants [1*ULTIMATE.start_main_~y~0 - 1 >= 0] [2020-10-26 04:16:50,311 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2020-10-26 04:16:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:50,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-26 04:16:50,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:50,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:16:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:50,392 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2020-10-26 04:16:50,392 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-10-26 04:16:50,451 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 30 states and 37 transitions. Complement of second has 6 states. [2020-10-26 04:16:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-26 04:16:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:16:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-10-26 04:16:50,453 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 13 letters. Loop has 1 letters. [2020-10-26 04:16:50,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:50,453 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:16:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-26 04:16:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:50,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:16:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:50,533 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 1 loop predicates [2020-10-26 04:16:50,534 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-10-26 04:16:50,573 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 30 states and 37 transitions. Complement of second has 6 states. [2020-10-26 04:16:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-26 04:16:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:16:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-10-26 04:16:50,576 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 13 letters. Loop has 1 letters. [2020-10-26 04:16:50,576 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:50,576 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:16:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:16:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-26 04:16:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:16:50,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:16:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:16:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:16:50,637 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2020-10-26 04:16:50,637 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-10-26 04:16:50,680 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 32 states and 39 transitions. Complement of second has 5 states. [2020-10-26 04:16:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-26 04:16:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:16:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-10-26 04:16:50,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 13 letters. Loop has 1 letters. [2020-10-26 04:16:50,682 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:50,682 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 14 letters. Loop has 1 letters. [2020-10-26 04:16:50,682 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:50,682 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 13 letters. Loop has 2 letters. [2020-10-26 04:16:50,682 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:16:50,682 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2020-10-26 04:16:50,684 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 04:16:50,684 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 0 states and 0 transitions. [2020-10-26 04:16:50,684 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-26 04:16:50,684 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-26 04:16:50,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-26 04:16:50,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:16:50,685 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:16:50,685 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:16:50,685 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:16:50,685 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-26 04:16:50,685 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-26 04:16:50,685 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 04:16:50,685 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-26 04:16:50,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.10 04:16:50 BoogieIcfgContainer [2020-10-26 04:16:50,693 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-26 04:16:50,693 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 04:16:50,694 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 04:16:50,694 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 04:16:50,695 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:16:29" (3/4) ... [2020-10-26 04:16:50,698 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-26 04:16:50,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 04:16:50,700 INFO L168 Benchmark]: Toolchain (without parser) took 21453.30 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 27.9 MB in the beginning and 19.7 MB in the end (delta: 8.2 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2020-10-26 04:16:50,701 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 44.0 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:16:50,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.07 ms. Allocated memory is still 44.0 MB. Free memory was 27.3 MB in the beginning and 26.7 MB in the end (delta: 647.0 kB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2020-10-26 04:16:50,703 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.23 ms. Allocated memory is still 44.0 MB. Free memory was 26.7 MB in the beginning and 25.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:16:50,703 INFO L168 Benchmark]: Boogie Preprocessor took 22.75 ms. Allocated memory is still 44.0 MB. Free memory was 25.4 MB in the beginning and 24.5 MB in the end (delta: 917.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:16:50,704 INFO L168 Benchmark]: RCFGBuilder took 271.00 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 35.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-26 04:16:50,705 INFO L168 Benchmark]: BuchiAutomizer took 20862.65 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.0 MB in the beginning and 20.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. [2020-10-26 04:16:50,706 INFO L168 Benchmark]: Witness Printer took 5.25 ms. Allocated memory is still 67.1 MB. Free memory is still 19.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:16:50,711 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 44.0 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 240.07 ms. Allocated memory is still 44.0 MB. Free memory was 27.3 MB in the beginning and 26.7 MB in the end (delta: 647.0 kB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.23 ms. Allocated memory is still 44.0 MB. Free memory was 26.7 MB in the beginning and 25.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.75 ms. Allocated memory is still 44.0 MB. Free memory was 25.4 MB in the beginning and 24.5 MB in the end (delta: 917.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 271.00 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 35.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 20862.65 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.0 MB in the beginning and 20.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.25 ms. Allocated memory is still 67.1 MB. Free memory is still 19.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (3 trivial, 4 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y and consists of 5 locations. One deterministic module has affine ranking function 2 * xtmp + 1 and consists of 4 locations. One deterministic module has affine ranking function xtmp and consists of 5 locations. One deterministic module has affine ranking function xtmp and consists of 4 locations. One nondeterministic module has affine ranking function -2 * y + 2 * xtmp + 1 and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 20.8s and 8 iterations. TraceHistogramMax:2. Analysis of lassos took 19.0s. Construction of modules took 0.3s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 32 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 6. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 56 SDtfs, 92 SDslu, 16 SDs, 0 SdLazy, 186 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso2 LassoPreprocessingBenchmarks: Lassos: inital24 mio100 ax149 hnf94 lsp64 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq175 hnf90 smp96 dnf100 smp100 tf103 neg99 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 15.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...