./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/bitvector/gcd_4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c20edfd7ede05443471560aa2c7be34d4e8c171 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:52:21,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:52:21,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:52:21,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:52:21,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:52:21,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:52:21,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:52:21,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:52:21,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:52:21,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:52:21,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:52:21,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:52:21,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:52:21,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:52:21,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:52:21,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:52:21,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:52:21,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:52:21,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:52:21,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:52:21,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:52:21,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:52:21,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:52:21,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:52:21,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:52:21,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:52:21,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:52:21,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:52:21,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:52:21,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:52:21,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:52:21,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:52:21,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:52:21,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:52:21,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:52:21,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:52:21,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:52:21,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:52:21,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:52:21,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:52:21,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:52:21,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 18:52:21,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:52:21,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:52:21,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:52:21,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:52:21,637 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:52:21,638 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:52:21,638 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:52:21,638 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:52:21,638 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:52:21,639 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:52:21,640 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:52:21,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:52:21,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:52:21,641 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:52:21,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:52:21,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:52:21,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:52:21,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:52:21,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:52:21,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:52:21,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:52:21,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:52:21,643 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:52:21,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:52:21,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:52:21,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:52:21,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:52:21,645 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:52:21,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:52:21,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:52:21,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:52:21,646 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:52:21,647 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:52:21,648 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2020-10-19 18:52:21,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:52:21,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:52:21,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:52:21,974 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:52:21,974 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:52:21,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_4.c [2020-10-19 18:52:22,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4d6383a/3ac924b04520450dbbe62ffd7f3c53b6/FLAGe9109caf4 [2020-10-19 18:52:22,426 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:52:22,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c [2020-10-19 18:52:22,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4d6383a/3ac924b04520450dbbe62ffd7f3c53b6/FLAGe9109caf4 [2020-10-19 18:52:22,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4d6383a/3ac924b04520450dbbe62ffd7f3c53b6 [2020-10-19 18:52:22,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:52:22,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:52:22,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:52:22,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:52:22,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:52:22,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:52:22" (1/1) ... [2020-10-19 18:52:22,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd6c9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:22, skipping insertion in model container [2020-10-19 18:52:22,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:52:22" (1/1) ... [2020-10-19 18:52:22,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:52:22,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:52:23,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:52:23,114 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:52:23,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:52:23,150 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:52:23,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23 WrapperNode [2020-10-19 18:52:23,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:52:23,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:52:23,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:52:23,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:52:23,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:52:23,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:52:23,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:52:23,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:52:23,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... [2020-10-19 18:52:23,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:52:23,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:52:23,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:52:23,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:52:23,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:52:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:52:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:52:23,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:52:23,590 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:52:23,591 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-10-19 18:52:23,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:52:23 BoogieIcfgContainer [2020-10-19 18:52:23,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:52:23,593 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:52:23,594 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:52:23,597 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:52:23,598 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:52:23,599 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:52:22" (1/3) ... [2020-10-19 18:52:23,600 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@364ef3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:52:23, skipping insertion in model container [2020-10-19 18:52:23,600 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:52:23,600 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:52:23" (2/3) ... [2020-10-19 18:52:23,601 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@364ef3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:52:23, skipping insertion in model container [2020-10-19 18:52:23,601 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:52:23,601 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:52:23" (3/3) ... [2020-10-19 18:52:23,603 INFO L373 chiAutomizerObserver]: Analyzing ICFG gcd_4.c [2020-10-19 18:52:23,684 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:52:23,684 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:52:23,684 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:52:23,685 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:52:23,685 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:52:23,685 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:52:23,686 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:52:23,686 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:52:23,720 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-10-19 18:52:23,763 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:23,764 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:23,764 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:23,771 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:52:23,772 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:23,772 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:52:23,772 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-10-19 18:52:23,778 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:23,779 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:23,779 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:23,780 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:52:23,780 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:23,789 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 24#L14true assume !(gcd_test_~a < 0); 18#L14-2true assume !(gcd_test_~b < 0); 25#L15-1true assume !(0 == gcd_test_~a); 11#L22-2true [2020-10-19 18:52:23,789 INFO L796 eck$LassoCheckResult]: Loop: 11#L22-2true assume !!(0 != gcd_test_~b); 15#L22true assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 11#L22-2true [2020-10-19 18:52:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 28695882, now seen corresponding path program 1 times [2020-10-19 18:52:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:23,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492319583] [2020-10-19 18:52:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:23,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:23,953 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:23,973 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 1 times [2020-10-19 18:52:23,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:23,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777776979] [2020-10-19 18:52:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:23,980 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:23,984 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:23,986 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1806939727, now seen corresponding path program 1 times [2020-10-19 18:52:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:23,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450212792] [2020-10-19 18:52:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:24,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450212792] [2020-10-19 18:52:24,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:52:24,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:52:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019731797] [2020-10-19 18:52:24,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:52:24,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:52:24,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:52:24,172 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-19 18:52:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:52:24,258 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-19 18:52:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:52:24,265 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 24 transitions. [2020-10-19 18:52:24,269 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:24,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 9 states and 10 transitions. [2020-10-19 18:52:24,278 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-10-19 18:52:24,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-10-19 18:52:24,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2020-10-19 18:52:24,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:52:24,281 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-19 18:52:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2020-10-19 18:52:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-19 18:52:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-19 18:52:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-10-19 18:52:24,314 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-19 18:52:24,314 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-19 18:52:24,315 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:52:24,315 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2020-10-19 18:52:24,316 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:24,317 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:24,317 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:24,318 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:52:24,318 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:24,318 INFO L794 eck$LassoCheckResult]: Stem: 60#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 58#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 59#L14 assume !(gcd_test_~a < 0); 63#L14-2 assume !(gcd_test_~b < 0); 64#L15-1 assume !(0 == gcd_test_~a); 65#L22-2 assume !!(0 != gcd_test_~b); 61#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 62#L22-2 [2020-10-19 18:52:24,318 INFO L796 eck$LassoCheckResult]: Loop: 62#L22-2 assume !!(0 != gcd_test_~b); 66#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 62#L22-2 [2020-10-19 18:52:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1806939725, now seen corresponding path program 1 times [2020-10-19 18:52:24,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786666214] [2020-10-19 18:52:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,394 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,400 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 2 times [2020-10-19 18:52:24,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905009490] [2020-10-19 18:52:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,411 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1302289042, now seen corresponding path program 1 times [2020-10-19 18:52:24,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212489765] [2020-10-19 18:52:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:24,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212489765] [2020-10-19 18:52:24,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632872925] [2020-10-19 18:52:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:52:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:52:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:24,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:52:24,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-19 18:52:24,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049766687] [2020-10-19 18:52:24,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:52:24,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:52:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:52:24,609 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-10-19 18:52:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:52:24,633 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-10-19 18:52:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:52:24,635 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2020-10-19 18:52:24,636 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:24,637 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2020-10-19 18:52:24,637 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-10-19 18:52:24,637 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-19 18:52:24,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-10-19 18:52:24,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:52:24,638 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-19 18:52:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-10-19 18:52:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-19 18:52:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-19 18:52:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-19 18:52:24,640 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-19 18:52:24,641 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-19 18:52:24,641 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:52:24,641 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2020-10-19 18:52:24,642 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:24,642 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:24,642 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:24,643 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1] [2020-10-19 18:52:24,643 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:24,643 INFO L794 eck$LassoCheckResult]: Stem: 115#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 113#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 114#L14 assume !(gcd_test_~a < 0); 118#L14-2 assume !(gcd_test_~b < 0); 119#L15-1 assume !(0 == gcd_test_~a); 120#L22-2 assume !!(0 != gcd_test_~b); 116#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 117#L22-2 assume !!(0 != gcd_test_~b); 121#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 123#L22-2 [2020-10-19 18:52:24,644 INFO L796 eck$LassoCheckResult]: Loop: 123#L22-2 assume !!(0 != gcd_test_~b); 122#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 123#L22-2 [2020-10-19 18:52:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1302289040, now seen corresponding path program 2 times [2020-10-19 18:52:24,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846771995] [2020-10-19 18:52:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,659 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,675 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 3 times [2020-10-19 18:52:24,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555711473] [2020-10-19 18:52:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,681 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,687 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1664285205, now seen corresponding path program 2 times [2020-10-19 18:52:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654233471] [2020-10-19 18:52:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:24,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654233471] [2020-10-19 18:52:24,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835407811] [2020-10-19 18:52:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:52:24,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:52:24,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:52:24,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:52:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:24,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:52:24,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-19 18:52:24,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943122182] [2020-10-19 18:52:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:52:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:52:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:52:24,891 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 8 states. [2020-10-19 18:52:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:52:24,922 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-10-19 18:52:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:52:24,923 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-10-19 18:52:24,924 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:24,924 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2020-10-19 18:52:24,925 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-10-19 18:52:24,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-10-19 18:52:24,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2020-10-19 18:52:24,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:52:24,926 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-19 18:52:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2020-10-19 18:52:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-19 18:52:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-19 18:52:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-19 18:52:24,929 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-19 18:52:24,929 INFO L594 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-19 18:52:24,929 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:52:24,929 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2020-10-19 18:52:24,930 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:24,930 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:24,931 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:24,931 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1, 1] [2020-10-19 18:52:24,931 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:24,932 INFO L794 eck$LassoCheckResult]: Stem: 182#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 180#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 181#L14 assume !(gcd_test_~a < 0); 185#L14-2 assume !(gcd_test_~b < 0); 186#L15-1 assume !(0 == gcd_test_~a); 187#L22-2 assume !!(0 != gcd_test_~b); 183#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 184#L22-2 assume !!(0 != gcd_test_~b); 188#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 192#L22-2 assume !!(0 != gcd_test_~b); 191#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 190#L22-2 [2020-10-19 18:52:24,932 INFO L796 eck$LassoCheckResult]: Loop: 190#L22-2 assume !!(0 != gcd_test_~b); 189#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 190#L22-2 [2020-10-19 18:52:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1664285203, now seen corresponding path program 3 times [2020-10-19 18:52:24,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469533691] [2020-10-19 18:52:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,957 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,962 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:24,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 4 times [2020-10-19 18:52:24,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592243485] [2020-10-19 18:52:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,969 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,971 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:24,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1650246872, now seen corresponding path program 3 times [2020-10-19 18:52:24,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:24,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318297927] [2020-10-19 18:52:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,984 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:24,996 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:25,000 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:25,290 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-19 18:52:25,398 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:52:25,399 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:52:25,399 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:52:25,399 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:52:25,400 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:52:25,400 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:25,400 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:52:25,401 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:52:25,401 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration4_Lasso [2020-10-19 18:52:25,401 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:52:25,401 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:52:25,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,522 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:52:25,843 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:52:25,848 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:25,854 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:25,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:25,857 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:25,857 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:25,858 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:25,864 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:25,864 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:25,870 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:52:25,914 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:25,917 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:25,917 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:52:25,918 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:25,918 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:25,919 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:25,920 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:52:25,920 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:52:25,922 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:52:25,968 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:25,970 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:25,970 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:25,970 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:25,970 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:25,975 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:25,976 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 [2020-10-19 18:52:25,982 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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,027 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,029 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,029 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,030 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,033 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,033 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,037 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) [2020-10-19 18:52:26,077 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,079 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,079 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,080 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,080 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,082 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,082 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,086 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,124 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,126 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,127 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,127 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,127 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,132 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,132 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,144 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:52:26,181 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,183 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,183 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,183 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,183 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,187 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,187 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,191 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 11 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,219 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 [2020-10-19 18:52:26,220 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,221 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,221 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,221 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,224 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,224 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,233 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,274 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,276 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,276 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,276 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,277 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,280 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,280 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,284 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,320 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,322 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,322 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,322 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,323 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,325 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,325 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,330 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,357 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,359 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,359 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,359 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,360 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,363 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,364 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,370 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,417 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,423 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,423 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,423 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,424 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,429 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,430 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,439 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,481 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,482 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,482 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,482 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,482 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,484 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,484 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:52:26,488 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:52:26,530 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,531 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,532 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,532 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,534 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:52:26,534 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,538 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,564 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,566 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,566 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:52:26,566 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,566 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:52:26,566 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,567 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:52:26,567 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:52:26,569 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,593 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:52:26,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:52:26,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:52:26,595 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-19 18:52:26,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:52:26,611 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2020-10-19 18:52:26,612 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2020-10-19 18:52:26,650 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:52:26,730 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2020-10-19 18:52:26,731 INFO L444 ModelExtractionUtils]: 25 out of 36 variables were initially zero. Simplification set additionally 5 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:52:26,740 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:52:26,746 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2020-10-19 18:52:26,747 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:52:26,748 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_gcd_test_~b) = 1*ULTIMATE.start_gcd_test_~b Supporting invariants [1*ULTIMATE.start_gcd_test_~a - 2 >= 0] [2020-10-19 18:52:26,806 INFO L297 tatePredicateManager]: 7 out of 8 supporting invariants were superfluous and have been removed [2020-10-19 18:52:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:52:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:26,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:52:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:26,946 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.4 stem predicates 1 loop predicates [2020-10-19 18:52:26,947 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-10-19 18:52:27,046 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 6 states. Result 14 states and 15 transitions. Complement of second has 6 states. [2020-10-19 18:52:27,047 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 [2020-10-19 18:52:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:52:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-10-19 18:52:27,050 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 11 letters. Loop has 2 letters. [2020-10-19 18:52:27,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:52:27,052 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:52:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:52:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:27,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:52:27,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:27,185 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.4 stem predicates 1 loop predicates [2020-10-19 18:52:27,185 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-10-19 18:52:27,253 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 6 states. Result 14 states and 15 transitions. Complement of second has 6 states. [2020-10-19 18:52:27,254 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 [2020-10-19 18:52:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:52:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-10-19 18:52:27,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 11 letters. Loop has 2 letters. [2020-10-19 18:52:27,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:52:27,255 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:52:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:52:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:27,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:52:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:27,374 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.4 stem predicates 1 loop predicates [2020-10-19 18:52:27,374 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-10-19 18:52:27,507 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 6 states. Result 21 states and 25 transitions. Complement of second has 12 states. [2020-10-19 18:52:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 4 stem states 1 non-accepting loop states 2 accepting loop states [2020-10-19 18:52:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:52:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 20 transitions. [2020-10-19 18:52:27,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 11 letters. Loop has 2 letters. [2020-10-19 18:52:27,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:52:27,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 13 letters. Loop has 2 letters. [2020-10-19 18:52:27,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:52:27,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 11 letters. Loop has 4 letters. [2020-10-19 18:52:27,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:52:27,512 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 25 transitions. [2020-10-19 18:52:27,513 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:52:27,513 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 19 states and 23 transitions. [2020-10-19 18:52:27,513 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-10-19 18:52:27,514 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-10-19 18:52:27,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 23 transitions. [2020-10-19 18:52:27,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:52:27,517 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-19 18:52:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 23 transitions. [2020-10-19 18:52:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-19 18:52:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 18:52:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-19 18:52:27,519 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-19 18:52:27,520 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-19 18:52:27,520 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 18:52:27,520 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 20 transitions. [2020-10-19 18:52:27,521 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:27,521 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:27,522 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:27,522 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1, 1, 1] [2020-10-19 18:52:27,522 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:27,523 INFO L794 eck$LassoCheckResult]: Stem: 463#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 461#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 462#L14 assume !(gcd_test_~a < 0); 468#L14-2 assume !(gcd_test_~b < 0); 469#L15-1 assume !(0 == gcd_test_~a); 470#L22-2 assume !!(0 != gcd_test_~b); 477#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 476#L22-2 assume !!(0 != gcd_test_~b); 475#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 474#L22-2 assume !!(0 != gcd_test_~b); 473#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 472#L22-2 assume !!(0 != gcd_test_~b); 464#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 465#L22-2 [2020-10-19 18:52:27,523 INFO L796 eck$LassoCheckResult]: Loop: 465#L22-2 assume !!(0 != gcd_test_~b); 471#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 465#L22-2 [2020-10-19 18:52:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1650246870, now seen corresponding path program 4 times [2020-10-19 18:52:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:27,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204896430] [2020-10-19 18:52:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:27,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204896430] [2020-10-19 18:52:27,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:52:27,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:52:27,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633547505] [2020-10-19 18:52:27,625 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:52:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 5 times [2020-10-19 18:52:27,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:27,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122513719] [2020-10-19 18:52:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:27,629 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:27,630 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:27,632 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:27,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:52:27,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:52:27,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:52:27,646 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. cyclomatic complexity: 5 Second operand 6 states. [2020-10-19 18:52:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:52:27,672 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-10-19 18:52:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:52:27,672 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 21 transitions. [2020-10-19 18:52:27,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:27,674 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 18 states and 20 transitions. [2020-10-19 18:52:27,674 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-10-19 18:52:27,674 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2020-10-19 18:52:27,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 20 transitions. [2020-10-19 18:52:27,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:52:27,674 INFO L691 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-19 18:52:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 20 transitions. [2020-10-19 18:52:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-19 18:52:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 18:52:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-19 18:52:27,677 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-19 18:52:27,677 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-19 18:52:27,677 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 18:52:27,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 19 transitions. [2020-10-19 18:52:27,677 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:27,677 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:27,678 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:27,678 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 1, 1, 1, 1, 1, 1] [2020-10-19 18:52:27,678 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:27,678 INFO L794 eck$LassoCheckResult]: Stem: 508#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 506#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 507#L14 assume !(gcd_test_~a < 0); 513#L14-2 assume !(gcd_test_~b < 0); 514#L15-1 assume !(0 == gcd_test_~a); 515#L22-2 assume !!(0 != gcd_test_~b); 522#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 521#L22-2 assume !!(0 != gcd_test_~b); 520#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 519#L22-2 assume !!(0 != gcd_test_~b); 518#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 517#L22-2 assume !!(0 != gcd_test_~b); 511#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 512#L22-2 assume !!(0 != gcd_test_~b); 509#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 510#L22-2 [2020-10-19 18:52:27,679 INFO L796 eck$LassoCheckResult]: Loop: 510#L22-2 assume !!(0 != gcd_test_~b); 516#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 510#L22-2 [2020-10-19 18:52:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1044312667, now seen corresponding path program 4 times [2020-10-19 18:52:27,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:27,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227217465] [2020-10-19 18:52:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:27,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227217465] [2020-10-19 18:52:27,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221888090] [2020-10-19 18:52:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:52:27,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:52:27,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:52:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:52:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:27,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:52:27,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-19 18:52:27,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657361370] [2020-10-19 18:52:27,854 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:52:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 6 times [2020-10-19 18:52:27,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:27,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039013433] [2020-10-19 18:52:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:27,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:27,859 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:27,860 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:52:27,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:52:27,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:52:27,875 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. cyclomatic complexity: 4 Second operand 12 states. [2020-10-19 18:52:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:52:27,934 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-19 18:52:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:52:27,935 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 23 transitions. [2020-10-19 18:52:27,936 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:27,936 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 22 transitions. [2020-10-19 18:52:27,936 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-10-19 18:52:27,936 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2020-10-19 18:52:27,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 22 transitions. [2020-10-19 18:52:27,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:52:27,937 INFO L691 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-19 18:52:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 22 transitions. [2020-10-19 18:52:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-19 18:52:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 18:52:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 18:52:27,939 INFO L714 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 18:52:27,939 INFO L594 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 18:52:27,939 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 18:52:27,939 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2020-10-19 18:52:27,940 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:52:27,940 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:52:27,940 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:52:27,940 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 4, 2, 1, 1, 1, 1, 1] [2020-10-19 18:52:27,941 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:52:27,941 INFO L794 eck$LassoCheckResult]: Stem: 605#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 603#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 604#L14 assume !(gcd_test_~a < 0); 610#L14-2 assume !(gcd_test_~b < 0); 611#L15-1 assume !(0 == gcd_test_~a); 612#L22-2 assume !!(0 != gcd_test_~b); 621#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 620#L22-2 assume !!(0 != gcd_test_~b); 619#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 618#L22-2 assume !!(0 != gcd_test_~b); 617#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 615#L22-2 assume !!(0 != gcd_test_~b); 616#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 614#L22-2 assume !!(0 != gcd_test_~b); 608#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 609#L22-2 assume !!(0 != gcd_test_~b); 606#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 607#L22-2 [2020-10-19 18:52:27,941 INFO L796 eck$LassoCheckResult]: Loop: 607#L22-2 assume !!(0 != gcd_test_~b); 613#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 607#L22-2 [2020-10-19 18:52:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1437871456, now seen corresponding path program 5 times [2020-10-19 18:52:27,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:27,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386684149] [2020-10-19 18:52:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:52:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:28,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386684149] [2020-10-19 18:52:28,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824115855] [2020-10-19 18:52:28,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:52:28,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-19 18:52:28,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:52:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 18:52:28,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:52:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:52:28,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:52:28,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-10-19 18:52:28,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478716243] [2020-10-19 18:52:28,210 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:52:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:52:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 7 times [2020-10-19 18:52:28,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:52:28,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684391132] [2020-10-19 18:52:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:52:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:28,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:52:28,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:52:28,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:52:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:52:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 18:52:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:52:28,232 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. cyclomatic complexity: 4 Second operand 13 states. [2020-10-19 18:52:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:52:28,371 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2020-10-19 18:52:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:52:28,371 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 15 transitions. [2020-10-19 18:52:28,372 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:52:28,372 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 0 states and 0 transitions. [2020-10-19 18:52:28,372 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 18:52:28,372 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 18:52:28,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 18:52:28,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:52:28,373 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:52:28,373 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:52:28,373 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:52:28,373 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 18:52:28,373 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:52:28,373 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:52:28,373 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 18:52:28,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:52:28 BoogieIcfgContainer [2020-10-19 18:52:28,380 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:52:28,380 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:52:28,380 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:52:28,381 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:52:28,381 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:52:23" (3/4) ... [2020-10-19 18:52:28,385 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:52:28,385 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:52:28,387 INFO L168 Benchmark]: Toolchain (without parser) took 5512.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 207.6 MB). Free memory was 958.6 MB in the beginning and 941.7 MB in the end (delta: 16.9 MB). Peak memory consumption was 224.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:52:28,388 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:52:28,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.21 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:52:28,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:52:28,390 INFO L168 Benchmark]: Boogie Preprocessor took 26.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:52:28,391 INFO L168 Benchmark]: RCFGBuilder took 311.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:52:28,392 INFO L168 Benchmark]: BuchiAutomizer took 4786.58 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 948.5 MB in the end (delta: 148.8 MB). Peak memory consumption was 223.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:52:28,393 INFO L168 Benchmark]: Witness Printer took 4.62 ms. Allocated memory is still 1.2 GB. Free memory was 948.5 MB in the beginning and 941.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:52:28,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 270.21 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 102.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 311.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4786.58 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 948.5 MB in the end (delta: 148.8 MB). Peak memory consumption was 223.3 MB. Max. memory is 11.5 GB. * Witness Printer took 4.62 ms. Allocated memory is still 1.2 GB. Free memory was 948.5 MB in the beginning and 941.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (6 trivial, 0 deterministic, 1 nondeterministic). One nondeterministic module has affine ranking function b and consists of 7 locations. 6 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.7s and 8 iterations. TraceHistogramMax:6. Analysis of lassos took 3.3s. Construction of modules took 0.2s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 4. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 19 states and ocurred in iteration 6. Nontrivial modules had stage [0, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 36 SDtfs, 69 SDslu, 44 SDs, 0 SdLazy, 270 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc3 concLT0 SILN3 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital146 mio100 ax100 hnf95 lsp66 ukn47 mio100 lsp81 div100 bol100 ite100 ukn100 eq205 hnf90 smp100 dnf122 smp100 tf100 neg97 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 155ms VariablesStem: 6 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...