./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:38:27,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:38:27,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:38:27,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:38:27,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:38:27,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:38:27,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:38:27,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:38:27,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:38:27,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:38:27,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:38:27,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:38:27,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:38:27,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:38:27,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:38:27,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:38:27,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:38:27,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:38:27,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:38:27,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:38:27,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:38:27,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:38:27,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:38:27,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:38:27,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:38:27,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:38:27,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:38:27,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:38:27,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:38:27,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:38:27,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:38:27,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:38:27,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:38:27,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:38:27,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:38:27,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:38:27,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:38:27,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:38:27,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:38:27,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:38:27,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:38:27,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 16:38:27,046 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:38:27,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:38:27,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:38:27,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:38:27,047 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:38:27,047 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 16:38:27,047 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 16:38:27,047 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 16:38:27,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 16:38:27,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 16:38:27,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 16:38:27,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:38:27,049 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 16:38:27,049 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:38:27,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 16:38:27,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:38:27,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:38:27,049 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 16:38:27,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:38:27,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:38:27,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:38:27,050 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 16:38:27,050 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 16:38:27,050 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 [2019-12-07 16:38:27,148 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:38:27,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:38:27,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:38:27,159 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:38:27,160 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:38:27,160 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2019-12-07 16:38:27,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/data/ce75ef08a/bedd531b6d0a495dac88244ac5746038/FLAG00e4415e9 [2019-12-07 16:38:27,634 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:38:27,635 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2019-12-07 16:38:27,638 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/data/ce75ef08a/bedd531b6d0a495dac88244ac5746038/FLAG00e4415e9 [2019-12-07 16:38:27,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/data/ce75ef08a/bedd531b6d0a495dac88244ac5746038 [2019-12-07 16:38:27,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:38:27,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:38:27,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:38:27,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:38:27,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:38:27,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2c5fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27, skipping insertion in model container [2019-12-07 16:38:27,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:38:27,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:38:27,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:38:27,767 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:38:27,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:38:27,820 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:38:27,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27 WrapperNode [2019-12-07 16:38:27,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:38:27,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:38:27,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:38:27,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:38:27,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:38:27,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:38:27,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:38:27,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:38:27,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... [2019-12-07 16:38:27,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:38:27,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:38:27,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:38:27,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:38:27,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:27,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:38:27,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:38:27,988 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:38:27,988 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-12-07 16:38:27,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:38:27 BoogieIcfgContainer [2019-12-07 16:38:27,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:38:27,990 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 16:38:27,990 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 16:38:27,992 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 16:38:27,992 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:38:27,993 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 04:38:27" (1/3) ... [2019-12-07 16:38:27,993 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@fe02b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 04:38:27, skipping insertion in model container [2019-12-07 16:38:27,993 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:38:27,993 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:38:27" (2/3) ... [2019-12-07 16:38:27,994 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@fe02b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 04:38:27, skipping insertion in model container [2019-12-07 16:38:27,994 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:38:27,994 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:38:27" (3/3) ... [2019-12-07 16:38:27,995 INFO L371 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a-modified.c [2019-12-07 16:38:28,024 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 16:38:28,024 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 16:38:28,024 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 16:38:28,024 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:38:28,024 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:38:28,025 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 16:38:28,025 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:38:28,025 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 16:38:28,033 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-12-07 16:38:28,046 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:28,046 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:38:28,046 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:38:28,050 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 16:38:28,050 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-12-07 16:38:28,050 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 16:38:28,050 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-12-07 16:38:28,051 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:28,051 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:38:28,051 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:38:28,051 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 16:38:28,051 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-12-07 16:38:28,056 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 5#L18-2true [2019-12-07 16:38:28,056 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-2true assume !!(main_~x~0 != main_~K~0); 7#L18true assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 5#L18-2true [2019-12-07 16:38:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-12-07 16:38:28,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:28,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056217683] [2019-12-07 16:38:28,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,127 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-12-07 16:38:28,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:28,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420606612] [2019-12-07 16:38:28,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,138 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:28,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:28,139 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-12-07 16:38:28,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:28,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351539343] [2019-12-07 16:38:28,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,150 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:28,193 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:28,194 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:28,194 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:28,194 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:28,194 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:38:28,194 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,194 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:28,194 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:28,194 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2019-12-07 16:38:28,194 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:28,195 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:28,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,275 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:28,275 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 2 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,279 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:28,279 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:28,286 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:38:28,287 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:28,291 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:28,294 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:38:28,294 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:28,299 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:28,299 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 5 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,309 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:38:28,310 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:28,485 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:38:28,486 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:28,486 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:28,486 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:28,486 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:28,487 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:38:28,487 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,487 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:28,487 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:28,487 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2019-12-07 16:38:28,487 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:28,487 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:28,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,527 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:28,530 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 6 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,534 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 [2019-12-07 16:38:28,536 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:38:28,536 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:38:28,537 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:38:28,537 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:38:28,537 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:38:28,539 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:38:28,539 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:38:28,541 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:38:28,546 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-12-07 16:38:28,546 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:28,550 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:38:28,550 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:38:28,550 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:38:28,551 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] [2019-12-07 16:38:28,554 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:38:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:28,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 16:38:28,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:28,593 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:38:28,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:28,606 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 16:38:28,607 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2019-12-07 16:38:28,636 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 23 states and 30 transitions. Complement of second has 6 states. [2019-12-07 16:38:28,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 16:38:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 16:38:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-12-07 16:38:28,638 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2019-12-07 16:38:28,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:28,639 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2019-12-07 16:38:28,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:28,639 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2019-12-07 16:38:28,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:28,640 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-12-07 16:38:28,642 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:28,644 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2019-12-07 16:38:28,645 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-12-07 16:38:28,645 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-12-07 16:38:28,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-12-07 16:38:28,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:38:28,645 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 16:38:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-12-07 16:38:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 16:38:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 16:38:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-12-07 16:38:28,662 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 16:38:28,662 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 16:38:28,662 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 16:38:28,662 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-12-07 16:38:28,663 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:28,663 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:38:28,663 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:38:28,663 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-12-07 16:38:28,663 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-12-07 16:38:28,663 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 69#L18-2 assume !!(main_~x~0 != main_~K~0); 67#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 63#L18-2 [2019-12-07 16:38:28,663 INFO L796 eck$LassoCheckResult]: Loop: 63#L18-2 assume !!(main_~x~0 != main_~K~0); 64#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 63#L18-2 [2019-12-07 16:38:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-12-07 16:38:28,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:28,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923655069] [2019-12-07 16:38:28,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,670 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-12-07 16:38:28,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:28,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414464083] [2019-12-07 16:38:28,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:28,675 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2019-12-07 16:38:28,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:28,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848284681] [2019-12-07 16:38:28,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:28,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848284681] [2019-12-07 16:38:28,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310632942] [2019-12-07 16:38:28,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:38:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:28,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:38:28,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:28,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:38:28,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-12-07 16:38:28,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353522500] [2019-12-07 16:38:28,750 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:28,750 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:28,750 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:28,750 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:28,750 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:38:28,750 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,751 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:28,751 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:28,751 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2019-12-07 16:38:28,751 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:28,751 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:28,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,756 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,785 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:28,785 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:28,788 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:28,788 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:28,792 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:38:28,793 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,797 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:28,797 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:28,801 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:38:28,802 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:28,805 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:28,806 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:28,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:38:28,812 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:28,982 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:38:28,983 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:28,983 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:28,984 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:28,984 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:28,984 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:38:28,984 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:28,984 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:28,984 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:28,984 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2019-12-07 16:38:28,984 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:28,984 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:28,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:28,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:29,013 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:29,014 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:29,017 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 [2019-12-07 16:38:29,019 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:38:29,019 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:38:29,019 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:38:29,019 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:38:29,021 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 16:38:29,021 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 16:38:29,025 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:29,029 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 [2019-12-07 16:38:29,030 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:38:29,030 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:38:29,030 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:38:29,031 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:38:29,032 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 16:38:29,033 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 16:38:29,036 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:29,041 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 [2019-12-07 16:38:29,042 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:38:29,042 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:38:29,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:38:29,043 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:38:29,043 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:38:29,043 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:38:29,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:38:29,045 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:38:29,050 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-12-07 16:38:29,050 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:29,057 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:38:29,057 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:38:29,057 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:38:29,057 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] [2019-12-07 16:38:29,059 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:38:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:29,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 16:38:29,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:29,086 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:38:29,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:29,087 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 16:38:29,087 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-12-07 16:38:29,098 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 11 states and 16 transitions. Complement of second has 5 states. [2019-12-07 16:38:29,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 16:38:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 16:38:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2019-12-07 16:38:29,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2019-12-07 16:38:29,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:29,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2019-12-07 16:38:29,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:29,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2019-12-07 16:38:29,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:29,099 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2019-12-07 16:38:29,100 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:29,100 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2019-12-07 16:38:29,100 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 16:38:29,101 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-12-07 16:38:29,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-12-07 16:38:29,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:38:29,101 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-12-07 16:38:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-12-07 16:38:29,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 16:38:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 16:38:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2019-12-07 16:38:29,102 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-12-07 16:38:29,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:38:29,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:38:29,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:38:29,105 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2019-12-07 16:38:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:38:29,121 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2019-12-07 16:38:29,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:38:29,122 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2019-12-07 16:38:29,122 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:29,122 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2019-12-07 16:38:29,122 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-12-07 16:38:29,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-12-07 16:38:29,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2019-12-07 16:38:29,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:38:29,123 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-12-07 16:38:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2019-12-07 16:38:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2019-12-07 16:38:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-12-07 16:38:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2019-12-07 16:38:29,123 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-12-07 16:38:29,124 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-12-07 16:38:29,124 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 16:38:29,124 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2019-12-07 16:38:29,124 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:29,124 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:38:29,124 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:38:29,124 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 16:38:29,124 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-12-07 16:38:29,124 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 158#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2019-12-07 16:38:29,124 INFO L796 eck$LassoCheckResult]: Loop: 154#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 153#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2019-12-07 16:38:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-12-07 16:38:29,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:29,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028266712] [2019-12-07 16:38:29,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:29,128 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2019-12-07 16:38:29,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:29,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528067684] [2019-12-07 16:38:29,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:29,133 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2019-12-07 16:38:29,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:29,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339500964] [2019-12-07 16:38:29,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:29,139 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:29,149 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:29,149 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:29,149 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:29,149 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:29,149 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:38:29,149 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:29,149 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:29,149 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:29,149 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2019-12-07 16:38:29,149 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:29,149 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:29,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:29,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:29,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:29,205 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:29,205 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:29,208 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:29,208 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:29,212 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:38:29,212 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:29,216 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:29,216 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:29,224 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:38:29,224 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:31,035 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:38:31,036 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:31,037 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:31,037 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:31,037 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:31,037 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:38:31,037 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:31,037 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:31,037 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:31,037 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2019-12-07 16:38:31,037 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:31,038 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:31,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:31,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:31,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:31,098 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:31,099 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/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 [2019-12-07 16:38:31,101 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 [2019-12-07 16:38:31,102 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:38:31,103 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:38:31,103 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:38:31,103 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-12-07 16:38:31,103 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:38:31,104 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-12-07 16:38:31,104 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:38:31,107 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:38:31,110 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 16:38:31,110 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:31,114 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:38:31,114 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:38:31,114 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:38:31,114 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~K~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~K~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2019-12-07 16:38:31,116 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:38:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:31,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 16:38:31,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:31,132 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:38:31,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:31,144 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-12-07 16:38:31,144 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2019-12-07 16:38:31,151 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 11 states and 13 transitions. Complement of second has 5 states. [2019-12-07 16:38:31,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 16:38:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 16:38:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 16:38:31,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-12-07 16:38:31,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:31,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2019-12-07 16:38:31,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:31,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2019-12-07 16:38:31,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:31,153 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2019-12-07 16:38:31,153 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:31,154 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2019-12-07 16:38:31,154 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-12-07 16:38:31,154 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-12-07 16:38:31,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2019-12-07 16:38:31,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:38:31,154 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-12-07 16:38:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2019-12-07 16:38:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2019-12-07 16:38:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-12-07 16:38:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-12-07 16:38:31,155 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-12-07 16:38:31,155 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-12-07 16:38:31,155 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 16:38:31,156 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2019-12-07 16:38:31,156 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-12-07 16:38:31,156 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:38:31,156 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:38:31,156 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2019-12-07 16:38:31,157 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-12-07 16:38:31,157 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 203#L18-2 assume !!(main_~x~0 != main_~K~0); 204#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 205#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2019-12-07 16:38:31,157 INFO L796 eck$LassoCheckResult]: Loop: 206#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 208#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2019-12-07 16:38:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2019-12-07 16:38:31,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:31,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694999685] [2019-12-07 16:38:31,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:31,165 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2019-12-07 16:38:31,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:31,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979265741] [2019-12-07 16:38:31,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:38:31,171 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:38:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2019-12-07 16:38:31,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:38:31,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238698919] [2019-12-07 16:38:31,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:38:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:31,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238698919] [2019-12-07 16:38:31,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:38:31,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 16:38:31,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626338706] [2019-12-07 16:38:31,216 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:31,216 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:31,216 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:31,216 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:31,216 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:38:31,216 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:31,216 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:31,216 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:31,216 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2019-12-07 16:38:31,216 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:31,216 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:31,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:31,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:31,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:31,274 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:31,274 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:31,277 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:38:31,278 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 23 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:31,287 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:38:31,287 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:38:33,455 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:38:33,458 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:38:33,458 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:38:33,458 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:38:33,458 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:38:33,458 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:38:33,458 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:33,458 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:38:33,458 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:38:33,459 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2019-12-07 16:38:33,459 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:38:33,459 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:38:33,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:33,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:33,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:38:33,519 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:38:33,519 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:33,522 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 [2019-12-07 16:38:33,523 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:38:33,523 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:38:33,524 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:38:33,524 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-12-07 16:38:33,524 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:38:33,525 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-12-07 16:38:33,525 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:38:33,527 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:38:33,529 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 16:38:33,530 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc995e17-1148-4a41-91d4-3bfcce74f951/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:38:33,532 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:38:33,532 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:38:33,532 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:38:33,532 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = -2*ULTIMATE.start_main_~x~0 + 2*ULTIMATE.start_main_~K~0 + 1 Supporting invariants [] [2019-12-07 16:38:33,534 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:38:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:33,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 16:38:33,545 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:33,548 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:38:33,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:33,557 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-12-07 16:38:33,557 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-12-07 16:38:33,560 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2019-12-07 16:38:33,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-12-07 16:38:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 16:38:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-12-07 16:38:33,560 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-12-07 16:38:33,560 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:33,560 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:38:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:33,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 16:38:33,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:33,573 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:38:33,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:33,583 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2019-12-07 16:38:33,583 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-12-07 16:38:33,587 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2019-12-07 16:38:33,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-12-07 16:38:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 16:38:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-12-07 16:38:33,587 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-12-07 16:38:33,588 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:33,588 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:38:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:38:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:33,598 INFO L264 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 16:38:33,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:38:33,600 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:38:33,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:38:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:38:33,614 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-12-07 16:38:33,614 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-12-07 16:38:33,622 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 8 states and 9 transitions. Complement of second has 4 states. [2019-12-07 16:38:33,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 16:38:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 16:38:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-12-07 16:38:33,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2019-12-07 16:38:33,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:33,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2019-12-07 16:38:33,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:33,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-12-07 16:38:33,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:38:33,624 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2019-12-07 16:38:33,624 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:38:33,625 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2019-12-07 16:38:33,625 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 16:38:33,625 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 16:38:33,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 16:38:33,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 16:38:33,625 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:38:33,625 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:38:33,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:38:33,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:38:33,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:38:33,625 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2019-12-07 16:38:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:38:33,625 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-12-07 16:38:33,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 16:38:33,626 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-12-07 16:38:33,626 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:38:33,626 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 16:38:33,626 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 16:38:33,626 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 16:38:33,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 16:38:33,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 16:38:33,626 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:38:33,626 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:38:33,626 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:38:33,626 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 16:38:33,626 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 16:38:33,626 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:38:33,626 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 16:38:33,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 04:38:33 BoogieIcfgContainer [2019-12-07 16:38:33,631 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 16:38:33,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:38:33,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:38:33,631 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:38:33,631 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:38:27" (3/4) ... [2019-12-07 16:38:33,634 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 16:38:33,634 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:38:33,635 INFO L168 Benchmark]: Toolchain (without parser) took 5985.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -104.2 MB). Peak memory consumption was 617.6 kB. Max. memory is 11.5 GB. [2019-12-07 16:38:33,635 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:38:33,636 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -153.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-12-07 16:38:33,636 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:38:33,636 INFO L168 Benchmark]: Boogie Preprocessor took 12.54 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:38:33,637 INFO L168 Benchmark]: RCFGBuilder took 133.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:38:33,637 INFO L168 Benchmark]: BuchiAutomizer took 5640.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 11.5 GB. [2019-12-07 16:38:33,637 INFO L168 Benchmark]: Witness Printer took 2.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:38:33,639 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -153.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.54 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 133.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5640.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x + -1 * K and consists of 4 locations. One deterministic module has affine ranking function x + -1 * K and consists of 3 locations. One deterministic module has affine ranking function 2 * K + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * x + 2 * K + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.6s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 5.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 11ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...